10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒       QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2021

OR

☐       TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 001-36541

LIMBACH HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

Delaware, USA	46-5399422
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1251 Waterfront Place, Suite 201 Pittsburgh, Pennsylvania	15222
(Address of principal executive offices)	(Zip Code)

1-412-359-2100

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Trading Symbol(s)	Name of Each Exchange on Which Registered
Common Stock, par value $0.0001 per share	LMB	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes  ☒    No   ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒     No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Smaller reporting company	☒
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐   No  ☒

As of August 11, 2021, there were 10,267,841 shares of the registrant’s common stock, $0.0001 par value per share, outstanding.

LIMBACH HOLDINGS, INC.

Form 10-Q

TABLE OF CONTENTS

Part I.
Item 1.	Financial Statements (Unaudited)	1
	Condensed Consolidated Balance Sheets as of June 30, 2021 and December 31, 2020	1
	Condensed Consolidated Statements of Operations for the Three and Six Months Ended June 30, 2021 and June 30, 2020	2
	Condensed Consolidated Statement of Stockholders’ Equity for the Three and Six Months Ended June 30, 2021 and June 30, 2020	3
	Condensed Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2021 and June 30, 2020	4
	Notes to Condensed Consolidated Financial Statements	5
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	29
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	48
Item 4.	Controls and Procedures	48
Part II.
Item 1.	Legal Proceedings	49
Item 1A.	Risk Factors	49
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	49
Item 3.	Defaults Upon Senior Securities	49
Item 4.	Mine Safety Disclosures	49
Item 5.	Other Information	49
Item 6.	Exhibits	50

Part I

Item 1. Financial Statements

LIMBACH HOLDINGS, INC.

Condensed Consolidated Balance Sheets

(Unaudited)

(in thousands, except share and per share data)	June 30, 2021		December 31, 2020
ASSETS
Current assets
Cash and cash equivalents	$	27,693	$	42,147
Restricted cash	113		113
Accounts receivable, net	94,615		85,767
Contract assets	70,815		67,098
Income tax receivable	891		—
Other current assets	5,599		4,292
Total current assets	199,726		199,417
Property and equipment, net	17,433		19,700
Intangible assets, net	11,473		11,681
Goodwill	6,129		6,129
Operating lease right-of-use assets	16,852		18,751
Deferred tax asset	6,393		6,087
Other assets	283		392
Total assets	$	258,289	$	262,157
LIABILITIES
Current liabilities
Current portion of long-term debt	$	8,454	$	6,536
Current operating lease liabilities	4,122		3,929
Accounts payable, including retainage	66,954		66,763
Contract liabilities	39,179		46,648
Accrued income taxes	—		1,671
Accrued expenses and other current liabilities	19,215		24,747
Total current liabilities	137,924		150,294
Long-term debt	24,721		36,513
Long-term operating lease liabilities	13,454		15,459
Other long-term liabilities	4,031		6,159
Total liabilities	180,130		208,425
Commitments and contingencies (Note 15)
STOCKHOLDERS’ EQUITY
Common stock, $0.0001 par value; 100,000,000 shares authorized, 10,251,696 issued and outstanding at June 30, 2021 and 7,926,137 at December 31, 2020	1		1
Additional paid-in capital	83,589		57,612
Accumulated deficit	(5,431)		(3,881)
Total stockholders’ equity	78,159		53,732
Total liabilities and stockholders’ equity	$	258,289	$	262,157

The accompanying notes are an integral part of these condensed consolidated financial statements

1

LIMBACH HOLDINGS, INC.

Condensed Consolidated Statements of Operations

(Unaudited)

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands, except share and per share data)	2021		2020		2021		2020
Revenue	$	121,019	$	135,185	$	234,363	$	273,957
Cost of revenue	102,329		114,850		198,444		235,398
Gross profit	18,690		20,335		35,919		38,559
Operating expenses:
Selling, general and administrative	17,232		13,752		34,377		30,552
Amortization of intangibles	104		274		208		417
Total operating expenses	17,336		14,026		34,585		30,969
Operating income	1,354		6,309		1,334		7,590
Other income (expenses):
Interest expense, net	(452)		(2,137)		(1,716)		(4,295)
Gain (loss) on disposition of property and equipment	94		(13)		8		17
Loss on early debt extinguishment	—		—		(1,961)		—
Gain (loss) on change in fair value of warrant liability	—		(102)		14		59
Total other expenses	(358)		(2,252)		(3,655)		(4,219)
Income (loss) before income taxes	996		4,057		(2,321)		3,371
Income tax provision (benefit)	264		1,110		(771)		476
Net income (loss)	$	732	$	2,947	$	(1,550)	$	2,895
Earnings Per Share (“EPS”)
Income (loss) per common share:
Basic	$	0.07	$	0.38	$	(0.16)	$	0.37
Diluted	$	0.07	$	0.37	$	(0.16)	$	0.37
Weighted average number of shares outstanding:
Basic	10,251,696		7,845,515		9,737,801		7,821,594
Diluted	10,469,028		7,905,368		9,737,801		7,878,246

The accompanying notes are an integral part of these condensed consolidated financial statements

2

LIMBACH HOLDINGS, INC.

Condensed Consolidated Statements of Stockholders’ Equity

(Unaudited)

	Common Stock
(in thousands, except share amounts)	Number of shares outstanding	Par value amount		Additional paid-in capital		Accumulated deficit		Stockholders’ equity
Balance at December 31, 2020	7,926,137	$	1	$	57,612	$	(3,881)	$	53,732
Stock-based compensation	—	—		677		—		677
Shares issued related to vested restricted stock units	89,446	—		—		—		—
Tax withholding related to vested restricted stock units	—	—		(183)		—		(183)
Shares issued related to employee stock purchase plan	8,928	—		92		—		92
Shares issued related to the exercise of warrants	172,869	—		1,989		—		1,989
Shares issued related to sale of common stock	2,051,025	—		22,773		—		22,773
Net loss	—	—		—		(2,282)		(2,282)
Balance at March 31, 2021	10,248,405	1		82,960		(6,163)		76,798
Stock-based compensation	—	—		636		—		636
Shares issued related to vested restricted stock units	3,291	—		—		—		—
Tax withholding related to vested restricted stock units	—	—		(7)		—		(7)
Net income	—	—		—		732		732
Balance at June 30, 2021	10,251,696	$	1	$	83,589	$	(5,431)	$	78,159

	Common Stock
(in thousands, except share amounts)	Number of shares outstanding	Par value amount		Additional paid-in capital		Accumulated deficit		Stockholders’ equity
Balance at December 31, 2019	7,688,958	$	1	$	56,557	$	(9,688)	$	46,870
Stock-based compensation	—	—		295		—		295
Shares issued related to vested restricted stock units	104,905	—		—		—		—
Net loss	—	—		—		(52)		(52)
Balance at March 31, 2020	7,793,863	1		56,852		(9,740)		47,113
Stock-based compensation	—	—		140		—		140
Shares issued related to vested restricted stock units	59,514	—		—		—		—
Net income	—	—		—		2,947		2,947
Balance at June 30, 2020	7,853,377	$	1	$	56,992	$	(6,793)	$	50,200

The accompanying notes are an integral part of these condensed consolidated financial statements

3

LIMBACH HOLDINGS, INC.

Condensed Consolidated Statements of Cash Flows

(Unaudited)

	Six months ended June 30,
(in thousands)	2021		2020
Cash flows from operating activities:
Net (loss) income	$	(1,550)	$	2,895
Adjustments to reconcile net (loss) income to cash (used in) provided by operating activities:
Depreciation and amortization	2,964		3,140
Provision for doubtful accounts	70		27
Stock-based compensation expense	1,313		435
Noncash operating lease expense	2,091		2,025
Amortization of debt issuance costs	220		1,080
Deferred income tax provision	(306)		798
Gain on sale of property and equipment	(8)		(17)
Loss on early debt extinguishment	1,961		—
Gain on change in fair value of warrant liability	(14)		(59)
Changes in operating assets and liabilities:
Accounts receivable	(8,918)		3,588
Contract assets	(3,717)		4,901
Other current assets	(1,306)		(166)
Accounts payable, including retainage	190		(19,519)
Prepaid income taxes	(891)		(171)
Accrued taxes payable	(1,671)		(11)
Contract liabilities	(7,469)		16,254
Operating lease liabilities	(2,004)		(2,399)
Accrued expenses and other current liabilities	(5,450)		9,419
Other long-term liabilities	(114)		237
Net cash (used in) provided by operating activities	(24,609)		22,457
Cash flows from investing activities:
Proceeds from sale of property and equipment	361		64
Advances to joint ventures	—		(1)
Purchase of property and equipment	(501)		(660)
Net cash used in investing activities	(140)		(597)
Cash flows from financing activities:
Proceeds from Wintrust Term Loan	30,000		—
Payments on Wintrust Term Loan	(2,000)		—
Proceeds from 2019 Revolving Credit Facility	—		7,250
Payments on 2019 Revolving Credit Facility	—		(7,250)
Payments on 2019 Refinancing Term Loan	(39,000)		—
Prepayment penalty and other costs associated with early debt extinguishment	(1,376)		—
Proceeds from the sale of common stock	22,773		—
Proceeds from the exercise of warrants	1,989		—
Payments on finance leases	(1,318)		(1,285)
Payments of debt issuance costs	(593)		—
Taxes paid related to net-share settlement of equity awards	(401)		(90)
Proceeds from contributions to Employee Stock Purchase Plan	221		—
Net cash provided by (used in) financing activities	10,295		(1,375)
(Decrease) increase in cash, cash equivalents and restricted cash	(14,454)		20,485
Cash, cash equivalents and restricted cash, beginning of period	42,260		8,457
Cash, cash equivalents and restricted cash, end of period	$	27,806	$	28,942
Supplemental disclosures of cash flow information
Noncash investing and financing transactions:
Right of use assets obtained in exchange for new operating lease liabilities	$	156	$	—
Right of use assets obtained in exchange for new finance lease liabilities	336		1,050
Right of use assets disposed or adjusted modifying operating lease liabilities	36		586
Right of use assets disposed or adjusted modifying finance lease liabilities	—		(64)
Interest paid	1,741		3,250
Cash paid for income taxes	$	2,096	$	734

The accompanying notes are an integral part of these condensed consolidated financial statements

4

LIMBACH HOLDINGS, INC.

Notes to Condensed Consolidated Financial Statements (Unaudited)

Note 1 – Organization and Plan of Business Operations

Limbach Holdings, Inc. (the “Company,” “we” or “us”), is a Delaware corporation headquartered in Pittsburgh, Pennsylvania that was formed on July 20, 2016, as a result of a business combination with Limbach Holdings LLC (“LHLLC”). The Company’s condensed consolidated financial statements include the accounts of Limbach Holdings, Inc. and its wholly-owned subsidiaries, including LHLLC, Limbach Facility Services LLC, Limbach Company LLC, Limbach Company LP, Harper Limbach LLC, and Harper Limbach Construction LLC.

As of January 1, 2021, the Company renamed its existing two reportable segments to reflect our two distinct approaches to our customer base and to better align with our owner direct strategy. The previously named Construction Segment is now known as General Contractor Relationships (“GCR”); the previously named Service Segment is now known as Owner Direct Relationships (“ODR”). The Company operates in two segments that are based on the relationship with its customer, (i) GCR, in which the Company generally manages new construction or renovation projects that involve primarily heating, ventilation, and air conditioning (“HVAC”), plumbing, or electrical services awarded to the Company by general contractors or construction managers, and (ii) ODR, in which the Company provides maintenance or service primarily on HVAC, plumbing or electrical systems, building controls and specialty contracting projects direct to, or assigned by, building owners or property managers. This work is primarily performed under fixed price, modified fixed price, and time and material contracts over periods of typically less than two years.

The Company's customers operate in diverse industries including, but not limited to, healthcare, life sciences, data centers, industrial and light manufacturing, entertainment, education and government. The Company operates primarily in the Northeast, Mid-Atlantic, Southeast, Midwest, and Southwestern regions of the United States.

Impact of the COVID-19 Pandemic

In March 2020, the World Health Organization declared the outbreak of COVID-19 a global pandemic. The COVID-19 pandemic has caused significant disruption and volatility on a global scale resulting in, among other things, an economic slowdown and the possibility of a continued economic recession. In response to the COVID-19 outbreak, national and local governments around the world instituted certain measures, including travel bans, restrictions on group events and gatherings, shutdowns of certain non-essential businesses, curfews, shelter-in-place orders and recommendations to practice social distancing. The various governmental actions have abated over time, but remain applicable to Limbach's operations in various ways, often varying by state. In some instances, these orders continued to affect certain projects in our GCR and ODR segments into the first quarter of 2021. In limited instances, during fiscal 2020, projects chose to shutdown work irrespective of the existence or applicability of government action. In most markets, construction is considered an essential business and Limbach continued to staff its projects and perform work during fiscal 2020 and into 2021, and most of the projects that were in progress at the time shutdowns commenced were restarted. The Company’s branches are expecting building owners to maintain or retrofit current facilities in lieu of funding larger capital projects as the effects of the pandemic remain ongoing and uncertain.

During fiscal 2020 and through the second quarter of 2021, the Company continued to take several actions to combat the adverse impacts that the COVID-19 outbreak had on our business including, but not limited to the following:

•    Identification of projects that have been shut down and methods for seeking to preserve any contractual entitlement that may exist to recover monetary and time impacts;

•    Establishment of a task force to identify possible types and areas of impact from COVID-19 for both shutdown and     continuing operations;

•    Examination of the Company's productivity and potential impact on gross profit as a result of COVID-19;

•    Implementation of the Company's pandemic response plan;

•    Implemented our furlough and work schedule reduction plans, as well as permanent reductions in force; and

•    Temporarily suspended substantially all discretionary, non-essential expenditures, including but not limited to, auto allowances, deferral of rent ranging between 1 and 3 months; and

•    A temporary 10% salary reduction for a select group of corporate and regional management, along with a 10% fee reduction in director compensation, and cost reduction opportunities identified by our external consultant.

5

During the month of July 2020, with the substantial restart and return of project and service work, the Company removed the 10% salary reduction for the select group of corporate and regional management, along with the fee reduction for director compensation, returned auto allowances, reinstated positions, removed schedule reduction plans and discontinued our hiring freeze. During the remainder of 2020 and into 2021, the Company reinstituted limited travel and in-person meetings, along with encouraging employees to return to the office, field and training settings in a partial, flexible manner that is consistent with our Work From Home Policy and our COVID-19 Policy. The Company has remained steadfastly committed to our COVID-19 Policy as our work environment evolves in response to the changing landscape of the pandemic and in response to the increasing availability of vaccinations.

We continue to monitor the short and long term impacts of the pandemic. While our employees and customers have adapted to a new work environment and there continues to be scientific, societal and economic progress to address the effect of COVID-19, there remains significant uncertainty about the future impacts of the pandemic, including the potential effects on our operations. We remain cautiously optimistic about the markets in which we operate and the customers we serve; however, the spread of more contagious variants of the virus, including the current rapid increase of the Delta Variant, may impact economic activity and could cause projects to be delayed or canceled, or we may experience access restrictions to our customers’ facilities and project sites. Additionally, the spread of the Delta Variant has the near-term possibility of causing some state and local governments where we work to reinstitute restrictions that could impact our customers, vendors and our own ability to perform existing projects.

The ongoing effects of the pandemic, including decreased consumer confidence and economic instability, can make it extremely difficult for our customers, our vendors and us to accurately forecast and plan future business activities, and could cause constrained spending on our services, delays and a lengthening of our business development efforts, the demand for more favorable pricing or other terms, and/or difficulty in collection of our accounts receivable. Our clients may face budget deficits or other financial constraints that prohibit them from funding proposed and existing projects. During the fourth quarter of 2020 and the first half of 2021, several of our business units experienced slowdowns in the closing of sales related to the ongoing effects of the pandemic, which impacted our revenue and profitability. These impacts may continue as the pandemic persists. Further, ongoing economic instability in the global markets, including from the pandemic, could limit our ability to access the capital markets at a time when we would like, or need, to raise capital, which could have an impact on our ability to react to changing business conditions or new opportunities. If economic conditions remain uncertain or weaken, or spending continues to be reduced, our financial condition and results of operations may be adversely affected.

The Company continues to take steps to minimize the adverse impacts of the COVID-19 pandemic on its business and to protect the safety of its employees, and the Company continues to emphasize wearing of masks, more frequent washing of hands and tools, social distancing, and work protocols. Limbach's COVID-19 Policy is based on the best practices provided by the Centers for Disease Control and Prevention (“CDC”) and Occupational Safety and Health Administration for essential workers. Our updated Work From Home Policy, along with the Company's business continuity planning and information technology enhancements enabled an orderly transition to remote work and facilitated social distancing for salaried employees. Although the Company has not mandated vaccinations for employees, it is encouraging all employees to be vaccinated, in accordance with CDC recommendations.

Testing and inpatient treatment for COVID-19 is covered under our medical plan and fees have been waived since the onset of the pandemic. Counseling is available through our employee assistance plan to assist employees with financial, mental and emotional stress related to the virus and other issues.

Note 2 – Significant Accounting Policies

Basis of Presentation

Condensed Consolidated Financial Statements

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with instructions to the Quarterly Report on Form 10-Q and Rule 8-03 of Regulation S-X for smaller reporting companies. Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. Readers of this report should refer to the consolidated financial statements and the notes thereto included in our most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on March 25, 2021.

6

Unaudited Interim Financial Information

The accompanying interim Condensed Consolidated Balance Sheets, Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Stockholders’ Equity and Condensed Consolidated Statements of Cash Flows for the periods presented are unaudited. Also, within the notes to the Condensed Consolidated Financial Statements, we have included unaudited information for these interim periods. These unaudited interim Condensed Consolidated Financial Statements have been prepared in accordance with GAAP. In our opinion, the accompanying unaudited Condensed Consolidated Financial Statements contain all normal and recurring adjustments necessary for a fair statement of the Company’s financial position as of June 30, 2021, its results of operations and its cash flows for the three and six months ended June 30, 2021. The results for the three and six months ended June 30, 2021 are not necessarily indicative of the results to be expected for the year ending December 31, 2021.

The Condensed Consolidated Balance Sheet as of December 31, 2020 was derived from our audited financial statements included in our Annual Report on Form 10-K filed with the SEC on March 25, 2021, but is presented as condensed and does not contain all of the footnote disclosures from the annual financial statements.

Note 3 – Accounting Standards

Recently Adopted Accounting Standards

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), which affects general principles within Topic 740, and is meant to simplify and reduce the cost of accounting for income taxes. It removes certain exceptions to the general principles in Topic 740 and simplifies areas including franchise taxes that are partially based on income, transactions with a government that result in a step up in the tax basis of goodwill, the incremental approach for intraperiod tax allocation, interim period income tax accounting for year-to-date losses that exceed anticipated losses and enacted changes in tax laws in interim periods. The changes are effective for annual periods beginning after December 15, 2020. The adoption of this pronouncement did not have a material impact on our condensed consolidated financial statements or presentation thereof.

Also in October 2020, the FASB issued ASU 2020-10, Codification Improvements. The amendments in this update remove references to various FASB Concepts Statements, situates all disclosure guidance in the appropriate disclosure section of the Codification, and makes other improvements and technical corrections to the Codification. The amendments in Sections B and C of this amendment are effective for annual periods beginning after December 15, 2020, for public business entities, with early adoption permitted. The adoption of this pronouncement did not have a material impact on our condensed consolidated financial statements or presentation thereof.

Recent Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments, which introduced an expected credit loss methodology for the measurement and recognition of credit losses on most financial instruments, including trade receivables and off-balance sheet credit exposure. Under this guidance, an entity is required to consider a broader range of information to estimate expected credit losses, which may result in earlier recognition of losses. This ASU also requires disclosure of information regarding how a company developed its allowance, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. The guidance is effective for smaller reporting companies on January 1, 2023 with early adoption permitted. The adoption of this standard will be through a cumulative-effect adjustment to retained earnings as of the effective date. Based on our historical experience, the Company does not expect that this pronouncement will have a significant impact in its financial statements or on the estimate of the allowance for doubtful accounts.

The FASB has issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting in March 2020. This new guidance provides optional expedients for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform, on financial reporting. The risk of termination of the London Interbank Offered Rate (LIBOR), has caused regulators to undertake reference rate reform initiatives to identify alternative reference rates that are more observable or transaction based that are less susceptible to manipulation. ASU 2020-04 is effective between March 12, 2020 and December 31, 2022.

7

In addition, in January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope. The amendments in this update refine the scope for certain optional expedients and exceptions for contract modifications and hedge accounting to apply to derivative contracts and certain hedging relationships affected by the discounting transition. The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the impact of adopting the reference rate reform guidance (both ASU 2020-04 and ASU 2021-01) on its condensed consolidated financial statements. Management has identified that its credit agreement utilizes LIBOR as a benchmark rate. Management will continue to evaluate the impact of adopting reference rate reform as the LIBOR benchmark rate within the credit agreement is phased out.

In August 2020, the FASB issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity and amends the scope guidance for contracts in an entity's own equity. The ASU addresses how convertible instruments are accounted for in the calculation of diluted earnings per share by using the if-converted method. The guidance is effective for all entities for fiscal years beginning after March 31, 2024, albeit early adoption is permitted no earlier than fiscal years beginning after December 15, 2020. Management is currently assessing the impact of this pronouncement on its condensed consolidated financial statements.

Note 4 – Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable and the allowance for doubtful accounts are comprised of the following:

(in thousands)	June 30, 2021		December 31, 2020
Accounts receivable - trade	$	94,881	$	86,033
Allowance for doubtful accounts	(266)		(266)
Accounts receivable, net	$	94,615	$	85,767

Note 5 – Contract Assets and Liabilities

The Company classifies contract assets and liabilities that may be settled beyond one year from the balance sheet date as current, consistent with the length of time of the Company’s project operating cycle.

Contract assets include costs in excess of billings and estimated earnings and amounts due under retainage provisions. The components of the contract asset balances as of the respective dates were as follows:

(in thousands)	June 30, 2021		December 31, 2020		Change
Contract assets
Costs in excess of billings and estimated earnings	$	38,200	$	31,894	$	6,306
Retainage receivable	32,615		35,204		(2,589)
Total contract assets	$	70,815	$	67,098	$	3,717

Retainage receivable represents amounts invoiced to customers where payments have been partially withheld, typically 10%, pending the completion of certain milestones, satisfaction of other contractual conditions or the completion of the project. Retainage agreements vary from project to project and balances could be outstanding for several months or years depending on a number of circumstances such as contract-specific terms, project performance and other variables that may arise as the Company makes progress towards completion.

8

Contract assets represent the excess of contract costs and profits (or contract revenue) over the amount of contract billings to date and are classified as a current asset. Contract assets result when either: 1) the appropriate contract revenue amount has been recognized over time in accordance with ASC Topic 606, but a portion of the revenue recorded cannot be currently billed due to the billing terms defined in the contract, or 2) costs are incurred related to certain claims and unapproved change orders. Claims occur when there is a dispute regarding both a change in the scope of work and the price associated with that change. Unapproved change orders occur when a change in the scope of work results in additional work being performed before the parties have agreed on the corresponding change in the contract price. The Company routinely estimates recovery related to claims and unapproved change orders as a form of variable consideration at the most likely amount it expects to receive and to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Claims and unapproved change orders are billable upon the agreement and resolution between the contractual parties and after the execution of contractual amendments. Increases in claims and unapproved change orders typically result from costs being incurred against existing or new positions; decreases normally result from resolutions and subsequent billings.

The current estimated net realizable value on such claims and unapproved change orders as recorded in contract assets and contract liabilities in the condensed consolidated balance sheets was $40.1 million and $33.6 million as of June 30, 2021 and December 31, 2020, respectively. The Company anticipates that the majority of such amounts will be approved or executed within one year. The resolution of these claims and unapproved change orders may require litigation or other forms of dispute resolution proceedings.

Contract liabilities include billings in excess of costs and estimated earnings and provisions for losses. The components of the contract liability balances as of the respective dates were as follows:

(in thousands)	June 30, 2021		December 31, 2020		Change
Contract liabilities
Billings in excess of costs and estimated earnings	$	38,611	$	46,020	$	(7,409)
Provisions for losses	568		628		(60)
Total contract liabilities	$	39,179	$	46,648	$	(7,469)

Billings in excess of costs and estimated earnings represent the excess of contract billings to date over the amount of contract costs and profits (or contract revenue) recognized to date. The balance may fluctuate depending on the timing of contract billings and the recognition of contract revenue.

Provisions for losses are recognized in the condensed consolidated statements of operations at the uncompleted performance obligation level for the amount of total estimated losses in the period that evidence indicates that the estimated total cost of a performance obligation exceeds its estimated total revenue.

The net overbilling position for contracts in process consist of the following:

(in thousands)	June 30, 2021		December 31, 2020
Revenue earned on uncompleted contracts	$	691,473	$	752,564
Less: Billings to date	(691,884)		(766,690)
Net overbilling	$	(411)	$	(14,126)
(in thousands)	June 30, 2021		December 31, 2020
Costs in excess of billings and estimated earnings	$	38,200	$	31,894
Billings in excess of costs and estimated earnings	(38,611)		(46,020)
Net overbilling	$	(411)	$	(14,126)

For the three and six months ended June 30, 2021 and 2020, we recorded revisions in our contract estimates for certain GCR and ODR projects.

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For the three months ended June 30, 2021 and 2020, total net gross profit write-downs were $1.1 million and $2.0 million, respectively. For projects having a material gross profit impact of $0.25 million or more for the three months ended June 30, 2021, this resulted in material gross profit write downs on three GCR segment projects of $1.7 million and one ODR project for $0.3 million. Of the material GCR segment write downs, one project was within the Michigan region for a total of $1.0 million, one project was within the New England region for $0.3 million and one project was within the Southern California region for $0.4 million. Of the material ODR segment write downs, one project was within the Eastern Pennsylvania region for $0.3 million. We also recorded material gross profit write ups of $0.3 million on one GCR segment project in the Florida region and $0.3 million on one ODR segment project in the Michigan region. For the three months ended June 30, 2020, we recorded material revisions in our contract estimates on four GCR projects which resulted in gross profit write downs of $1.5 million. Two of these projects were within the Southern California region for a total of $0.7 million. No project revisions resulting in material gross profit write ups were recorded during the three months ended June 30, 2020.

For the six months ended June 30, 2021 and 2020, total net gross profit write-downs were $1.7 million and $3.4 million, respectively. For projects having a material gross profit impact of $0.25 million or more, we recorded gross profit write downs on eight GCR segment projects of $3.5 million and one ODR project for $0.3 million. Of the material GCR segment write downs, two projects were within the Michigan region for a total of $1.2 million, two projects were within the Eastern Pennsylvania region for $1.0 million, two projects were within the Southern California region for $0.8 million, one project was within the New England region for $0.3 million, and one project was within the Mid-Atlantic region for $0.3 million. We also materially wrote down one ODR segment project within the Eastern Pennsylvania region for $0.3 million. We also recorded material GCR segment gross profit write ups of $0.9 million on one GCR segment project in the Michigan region for $0.5 million and one project within the Ohio region for $0.4 million. For the six months ended June 30, 2020, we recorded material gross profit write downs on eight GCR projects and two gross profit write ups on GCR projects, for an aggregate revision of $5.2 million and $1.2 million, respectively.

Note 6 – Goodwill and Intangibles

Goodwill was $6.1 million at both June 30, 2021 and December 31, 2020. The goodwill is associated with the Company's ODR segment. Intangible assets are comprised of the following:

(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
June 30, 2021(1)
Amortized intangible assets:
Customer Relationships – ODR	$	4,710	$	(3,312)	$	1,398
Favorable Leasehold Interests(2)	190		(75)		115
Total amortized intangible assets	4,900		(3,387)		1,513
Unamortized intangible assets:
Trade Name	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	14,860	$	(3,387)	$	11,473

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(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
December 31, 2020(1)
Amortized intangible assets:
Customer Relationships – ODR	$	4,710	$	(3,112)	$	1,598
Favorable Leasehold Interests	530		(407)		123
Total amortized intangible assets	5,240		(3,519)		1,721
Unamortized intangible assets:
Trade Name	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	15,200	$	(3,519)	$	11,681

(1)     The Backlog-Construction intangible asset previously shown at December 31, 2020 has been fully amortized. Accordingly, its gross carrying amount of $4.8 million and corresponding accumulated amortization of $4.8 million have been removed from the table.

(2)     The gross carrying amount and accumulated amortization associated with our Favorable leasehold interests intangible asset was reduced by $0.3 million due to the lease termination of our Western Pennsylvania office associated with the intangible asset.

The definite-lived intangible assets are amortized over the period the Company expects to receive the related economic benefit, which for customer relationships is based upon estimated future net cash inflows. The Company has previously determined that its trade name has an indefinite useful life. The Limbach trade name has been in existence since the Company’s founding in 1901 and therefore is an established brand within the industry.

Total amortization expense for these amortizable intangible assets was $0.1 million and $0.2 million for the three and six months ended June 30, 2021, respectively, and $0.3 million and $0.4 million for the three and six months ended June 30, 2020, respectively.

The Company did not recognize any impairment charges on its goodwill or intangible assets for the three and six months ended June 30, 2021 or 2020.

Note 7 – Debt

Long-term debt consists of the following obligations as of:

(in thousands)	June 30, 2021		December 31, 2020
2019 Refinancing Term Loan - term loan payable in quarterly installments of principal, (commencing in September 2020) plus interest through April 2022	$	—	$	39,000
2019 Refinancing Revolving Credit Facility	—		—
Wintrust Term Loan - term loan payable in quarterly installments of principal, (commencing in March 2021) plus interest through February 2026	28,000		—
Wintrust Revolving Loan	—		—
Finance leases – collateralized by vehicles, payable in monthly installments of principal, plus interest ranging from 4.70% to 6.45% through 2025	5,476		6,459
Total debt	33,476		45,459
Less - Current portion of long-term debt	(8,454)		(6,536)
Less - Unamortized discount and debt issuance costs	(301)		(2,410)
Long-term debt	$	24,721	$	36,513

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The Company refinanced its 2019 Refinancing Term Loan and 2019 Refinancing Revolving Credit Facility on February 24, 2021, described below and therefore had no amounts outstanding under these agreements at June 30, 2021. Accordingly, the Company recognized a loss on the early debt extinguishment related to the refinancing of $2.0 million on the refinancing date. This loss consisted of the write-off of $2.6 million of debt issuance and debt discount costs, the reversal of the $2.0 million CB warrants liability due to the warrants being cancelled on the refinancing date and the prepayment penalty and other extinguishment costs of $1.4 million.

2019 Refinancing Agreement

On April 12, 2019 (the “Refinancing Closing Date”), Limbach Facility Services LLC (“LFS”) entered into a financing agreement (the “2019 Refinancing Agreement”) with the lenders thereto and Cortland Capital Market Services LLC, as collateral agent and administrative agent and CB Agent Services LLC, as origination agent (“CB”). The 2019 Refinancing Agreement consisted of (i) a $40.0 million term loan (the “2019 Refinancing Term Loan”) and (ii) a new $25.0 million multi-draw delayed draw term loan (the “2019 Delayed Draw Term Loan” and, collectively with the 2019 Refinancing Term Loan, the “2019 Term Loans”). Proceeds from the 2019 Refinancing Term Loan were used to repay the then existing Credit Agreement, to pay related fees and expenses thereof and to fund working capital of the 2019 Refinancing Borrowers (defined below). Management intended for proceeds of the 2019 Delayed Draw Term Loan to be used to fund permitted acquisitions under the 2019 Refinancing Agreement and related fees and expenses in connection therewith.

LFS and each of its subsidiaries were borrowers (the “2019 Refinancing Borrowers”) under the 2019 Refinancing Agreement. In addition, the 2019 Refinancing Agreement was guaranteed by the Company and LHLLC (each, a “2019 Refinancing Guarantor”, and together with the 2019 Refinancing Borrowers, the “Loan Parties”).

The 2019 Refinancing Agreement was secured by a first-priority lien on the real property of the Loan Parties and a second-priority lien on substantially all other assets of the Loan Parties, behind the 2019 ABL Credit Agreement (as defined below). The respective lien priorities of the 2019 Refinancing Agreement and the 2019 ABL Credit Agreement were governed by an intercreditor agreement.

2019 Refinancing Agreement - Interest Rates and Fees

The interest rate on borrowings under the 2019 Refinancing Agreement was, at the 2019 Refinancing Borrowers’ option, either LIBOR (with a 2.00% floor) plus 11.00% or a base rate (with a 3.00% minimum) plus 10.00%. At February 24, 2021 (the 2021 refinancing date) and June 30, 2020, the interest rate in effect on the 2019 Refinancing Term Loan was 13.00%.

2019 Refinancing Agreement - Other Terms and Conditions

The 2019 Refinancing Agreement was set to mature on April 12, 2022, subject to certain adjustment. Required amortization was $1.0 million per quarter and commenced with the fiscal quarter ending September 30, 2020. There was an unused line fee of 2.0% per annum on the undrawn portion of the 2019 Delayed Draw Term Loan, and there was a make-whole premium on prepayments made prior to the 19-month anniversary of the Refinancing Closing Date. This make-whole provision guaranteed that the Company would pay no less than 18 months’ applicable interest to the lenders under the 2019 Refinancing Agreement.

The 2019 Refinancing Agreement contained representations and warranties, and covenants which were customary for debt facilities of this type. Unless the Required Lenders (as defined in the 2019 Refinancing Agreement) otherwise consented in writing, the covenants limited the ability of the Company and its restricted subsidiaries to, among other things, (i) incur additional indebtedness or issue preferred stock, (ii) pay dividends or make distributions to the Company’s stockholders, (iii) purchase or redeem the Company’s equity interests, (iv) make investments, (v) create liens on their assets, (vi) enter into transactions with the Company’s affiliates, (vii) sell assets and (viii) merge or consolidate with, or dispose of substantially all of the Company’s assets to, other companies.

In addition, the 2019 Refinancing Agreement included customary events of default and other provisions that could require all amounts due thereunder to become immediately due and payable, either automatically or at the option of the lenders, if the Company failed to comply with the terms of the 2019 Refinancing Agreement or if other customary events occur.

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Furthermore, the 2019 Refinancing Agreement also contained two financial maintenance covenants for the 2019 Refinancing Term Loan, including a requirement to have sufficient collateral coverage of the aggregate outstanding principal amount of the 2019 Term Loans and as of the last day of each month for the total leverage ratio of the Company and its subsidiaries (the “Total Leverage Ratio”) not to exceed an amount beginning at 4.25 to 1.00 through June 30, 2019, and stepping down to 2.00 to 1.00 effective July 1, 2021. From July 1, 2019 through September 30, 2019, the Total Leverage Ratio may not exceed 4.00 to 1.00. In addition, the parties to the 2019 Refinancing Agreement entered into an amendment which, among other changes, revised the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 through the term of such agreement. The 2019 Refinancing Agreement contained a post-closing covenant requiring the remediation of the Company’s material weakness, as described in Item 9A of its 2018 Annual Report on Form 10-K, no later than December 31, 2020 and provision for updates as to the progress of such remediation, provided that, if such remediation was not completed on or prior to December 31, 2019, (x) the Company would be required to pay the post-closing fee pursuant to the terms of the Origination Agent Fee Letter (as defined in the 2019 Refinancing Agreement) and (y) the applicable margin shall be increased by 1.00% per annum for the period from January 1, 2020 until the date at which the material weakness was no longer disclosed or required to be disclosed in the Company’s SEC filings or audited financial statements of the Company or related auditor’s reports.

In connection with the 2019 Refinancing Amendment Number One and Waiver, dated November 14, 2019, the parties amended certain provisions of the 2019 Refinancing Agreement, including, among other changes to: (i) require, commencing October 1, 2019, a 3.00% increase in the interest rate on borrowings under the 2019 Refinancing Agreement; (ii) require the approval of CB and, generally, the lenders representing at least 50.1% of the aggregate undrawn term loan commitment or unpaid principal amount of the 2019 Term Loans, prior to effecting any permitted acquisition; (iii) revise the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 and thereafter through the term of the 2019 Refinancing Agreement; and (iv) require the liquidity of the loan parties, which is generally calculated by adding (a) unrestricted cash on hand of the Loan Parties maintained in deposit accounts subject to control agreements granting control to the collateral agent for the 2019 ABL Credit Agreement, to (b) the difference between (1) the lesser of (x) $15 million, as adjusted from time to time, and (y) 75% of certain customer accounts resulting from the sale of goods or services in the ordinary course of business minus certain reserves established by the administrative agent and (2) the sum of (x) the outstanding principal balance of all revolving loans under the 2019 ABL Credit Agreement plus (y) the aggregate undrawn available amount of all letters of credit then outstanding plus the amount of any obligations that arise from any draw against any letter of credit that have not been reimbursed by the borrowers or funded with a revolving loan under the 2019 ABL Credit Agreement (the “Loan Parties Liquidity”), as of the last day of any fiscal month ending on or after November 30, 2019, of at least $10,000,000. As a condition to executing the 2019 Refinancing Amendment Number One and Waiver, the loan parties were required to pay a non-refundable waiver fee of $400,000 and a non-refundable amendment fee of $1,000,000 (the “PIK First Amendment Fee”, which shall be paid in kind by adding the PIK First Amendment Fee to the outstanding principal amount of the 2019 Refinancing Term Loan as additional principal obligations thereunder on and as of the effective date 2019 Refinancing Amendment Number One and Waiver).

During December 2020, the Company was not in compliance with the collateral coverage debt covenant as defined by the 2019 Term Loan financing agreement. The Company was required to maintain at all times a Collateral Coverage Amount (as defined in the 2019 Refinancing Term Loan financing agreement) equal to or greater than the aggregate outstanding principal amount of the 2019 Term Loans. The Company calculated its Collateral Coverage amount at $37.9 million as of December 31, 2020, the aggregate outstanding principal amount of Term Loans was $39.0 million as of that same date for an excess of debt over collateral of $1.1 million. On February 1, 2021, the Company, LFS and LHLLC entered into a Waiver - Collateral Coverage Amount (December 2020) ("December 2020 Waiver") with the lenders party thereto and Cortland Capital Market Services LLC as collateral agent and administrative agent. The December 2020 Waiver included a waiver of the Company's compliance with the Collateral Coverage Amount for the month ending December 31, 2020. The lender waived the event of default arising from this noncompliance as of December 31, 2020, while reserving its rights with respect to covenant compliance in future months.

The 2019 Refinancing Term Loan was paid in full on February 24, 2021 as part of the refinancing transaction.

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2019 Refinancing Agreement - CB Warrants

In connection with the 2019 Refinancing Agreement, on the Refinancing Closing Date, the Company issued to CB and the other lenders under the 2019 Refinancing Agreement warrants (the “CB Warrants”) to purchase up to a maximum of 263,314 shares of the Company's common stock at an exercise price of $7.63 per share subject to certain adjustments, including for stock dividends, stock splits or reclassifications. The actual number of shares of common stock into which the CB Warrants were exercisable at any given time were equal to: (i) the product of (x) the number of shares equal to 2% of the Company’s issued and outstanding shares of common stock on the Refinancing Closing Date on a fully diluted basis and (y) the percentage of the total 2019 Delayed Draw Term Loan made as of the exercise date, minus (ii) the number of shares previously issued under the CB Warrants. As of the Refinancing Closing Date through February 24, 2021, no amounts had been drawn on the 2019 Delayed Draw Term Loan, so no portion of the CB Warrants were exercisable. The CB Warrants were to be exercised for cash or on a “cashless basis,” subject to certain adjustments, at any time after the 2019 Refinancing Closing Date until the expiration of such warrant at 5:00 p.m., New York time, on the earlier of (i) the five (5) year anniversary of the 2019 Refinancing Closing Date, or (ii) the liquidation of the Company. 

Accounting for the 2019 Term Loans and CB Warrants

The CB Warrants represented a freestanding financial instrument that was classified as a liability because the CB Warrants met the definition of a derivative instrument that does not meet the equity scope exception (i.e., the CB Warrants were not indexed to the entity’s own equity). In addition, the material weakness penalty described above was evaluated as an embedded derivative liability and bifurcated from the 2019 Term Loans as it represented a non-credit related embedded feature that provides for net settlement. Both the CB Warrants liability and the embedded derivative liability were required to be initially and subsequently measured at fair value. The initial fair values of the CB Warrants liability and the embedded derivative liability approximated $0.9 million and $0.4 million, respectively, on the Refinancing Closing Date. The Company estimated these fair values by using the Black-Scholes-Merton option pricing model and a probability-weighted discounted cash flow approach.

The CB Warrants liability was included in other long-term liabilities. The Company remeasured the fair value of the CB Warrants liability as of December 31, 2020 and February 24, 2021 prior to the refinancing date and recorded any adjustments as other income (expense). At both February 24, 2021 and December 31, 2020, the CB Warrants liability was $2.0 million. Due to the extinguishment of the CB Warrants on February 24, 2021, there was no liability associated with the CB Warrants recorded as of June 30, 2021. For the six months ended June 30, 2021, the Company recorded other income of $0.1 million to reflect the change in the fair value of the CB Warrants liability. The Company did not record a change in fair value of the warrant liability during the three months ended June 30, 2021 as the CB Warrants liability was extinguished as part of the debt refinancing on February 24, 2021. For the three and six months ended June 30, 2020, the Company recorded other income of $0.1 million and other expense of $0.1 million to reflect the change in the CB Warrants liability.

The proceeds for the 2019 Refinancing Term Loan were first allocated to the CB Warrants liability and embedded derivative liability based on their respective fair values with a corresponding amount of $1.3 million recorded as a debt discount to the 2019 Term Loans. In addition, the Company incurred approximately $3.9 million of debt issuance costs, including $1.4 million related to the first amendment, for the 2019 Term Loans that have also been recorded as a debt discount. The combined debt discount from the CB Warrants liability, embedded derivative liability and the debt issuance costs were being amortized into interest expense over the term of the 2019 Term Loans using the effective interest method and were expensed on the refinancing date as a loss on early debt extinguishment. The Company recorded interest expense for the amortization of the CB Warrants liability and embedded derivative debt discounts of $0.1 million for the six months ended June 30, 2021. The Company did not record interest expense for the amortization of the CB Warrants liability and embedded derivative liability debt discounts for the three months ended June 30, 2021 as these debt discounts were extinguished as part of the debt refinancing on February 24, 2021. The Company recorded interest expense for the amortization of the CB Warrants liability and embedded derivative debt discounts of $0.1 million and $0.2 million for the three and six months ended June 30, 2020, respectively.

In addition to the amortization of the debt discounts into interest expense, the Company recorded $0.1 million of interest expense for the amortization of debt issuance costs related to the 2019 Refinancing Term Loan for the six months ended June 30, 2021. The Company did not record any interest expense for the amortization of debt issuance costs for the three months ended June 30, 2021 as the debt issuance costs were extinguished as part of the debt refinancing on February 24, 2021. For the three and six months ended June 30, 2020, the Company recorded an additional $0.4 million and $0.7 million of interest expense, respectively, for the amortization of the debt issuance costs related to the 2019 Refinancing Term Loan.

14

2019 ABL Credit Agreement

On the Refinancing Closing Date, LFS also entered into a financing agreement with the lenders thereto and Citizens Bank, N.A., as collateral agent, administrative agent and origination agent (the “2019 ABL Credit Agreement” and, together with the 2019 Refinancing Agreement, the “Refinancing Agreements”). The 2019 ABL Credit Agreement consisted of a $15.0 million revolving credit facility (the “2019 Revolving Credit Facility”). Proceeds of the 2019 Revolving Credit Facility were to be used for general corporate purposes. On the Refinancing Closing Date, the Company had nothing drawn on the ABL Credit Agreement and $14.0 million of available borrowing capacity thereunder (net of a $1.0 million reserve imposed by the lender).

The 2019 Refinancing Borrowers and 2019 Refinancing Guarantors under the 2019 ABL Credit Agreement were the same as under the 2019 Refinancing Agreement. The 2019 ABL Credit Agreement was secured by a second-priority lien on the real property of the Loan Parties (behind the 2019 Refinancing Agreement) and a first-priority lien on substantially all other assets of the Loan Parties.

2019 ABL Credit Agreement - Interest Rates and Fees

The interest rate on borrowings under the 2019 ABL Credit Agreement was, at the 2019 Refinancing Borrowers’ option, either LIBOR (with a 2.0% floor) plus an applicable margin ranging from 3.00% to 3.50% or a base rate (with a 3.0% minimum) plus an applicable margin ranging from 2.00% to 2.50%. At February 24, 2021 (the 2021 refinancing date) and June 30, 2020, the interest rate in effect on the 2019 ABL Credit Agreement was 5.25%.

2019 ABL Credit Agreement - Other Terms and Conditions

The 2019 ABL Credit Agreement was set to mature on April 12, 2022. There was also an unused line fee ranging from 0.250% to 0.375% per annum on undrawn amounts.

The 2019 ABL Credit Agreement contained representations and warranties, and covenants which are customary for debt facilities of this type. Unless the Required Lenders otherwise consented in writing, the covenants limited the ability of the Company and its restricted subsidiaries to, among other things, generally, to (i) incur additional indebtedness or issue preferred stock, (ii) pay dividends or make distributions to the Company’s stockholders, (iii) purchase or redeem the Company’s equity interests, (iv) make investments, (v) create liens on their assets, (vi) enter into transactions with the Company’s affiliates, (vii) sell assets other than in the ordinary course of business or another permitted disposition of assets and (viii) merge or consolidate with, or dispose of substantially all of the Company’s assets to, other companies.

The 2019 ABL Credit Agreement included customary events of default and other provisions that could require all amounts due thereunder to become immediately due and payable, either automatically or at the option of the lenders, if the Company failed to comply with the terms of the 2019 ABL Credit Agreement or if other customary events occur.

The 2019 ABL Credit Agreement also contained a financial maintenance covenant for the 2019 Revolving Credit Facility, which is a requirement for the Total Leverage Ratio of the Company and its subsidiaries not to exceed an amount beginning at 4.00 to 1.00 through September 30, 2019, and stepping down to 1.75 to 1.00 effective July 1, 2021. In addition, the parties to the 2019 ABL Credit Agreement entered into an amendment which, among other changes revises the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 through the term of such agreement.

In connection with the 2019 ABL Credit Amendment Number One and Waiver, the parties amended certain provisions of the 2019 ABL Credit Agreement, including, among other changes to (i) require the approval of the origination agent and, generally, the lenders representing at least 50.1% of the aggregate undrawn revolving loan commitment or unpaid principal amount of the 2019 Term Loans, prior to effecting any permitted acquisition; (ii) revise the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 through the term of the 2019 ABL Credit Agreement; and (iii) require the Loan Parties Liquidity as of the last day of any fiscal month ending on or after November 30, 2019, of at least $10,000,000, as described above in the Amendment Number One to 2019 Refinancing Agreement and Waiver. As a condition to executing the 2019 ABL Credit Amendment Number One and Waiver, the loan parties were required to pay a non-refundable waiver fee of $7,500.

15

As noted above in the section titled: 2019 Refinancing Agreement - Other Terms and Conditions, the Company was subject to cross-default under our 2019 Revolving Credit Facility as a result of our failure to satisfy the Collateral Coverage Amount as defined in the 2019 Term Loan financing agreement, which required the company to obtain a waiver. Accordingly, on February 1, 2021, the Company, LFS and LHLLC entered into a Waiver - Collateral Coverage Amount (December 2020) (“December 2020 Waiver”) with the lenders party thereto and Citizens Bank, N.A., as collateral agent and administrative agent. The December 2020 Waiver included a waiver of the Company's compliance with the Collateral Coverage Amount for the month ending December 31, 2020. The lender has waived the event of default arising from this noncompliance as of December 31, 2020, while reserving its rights with respect to covenant compliance in future months.

At February 24, 2021 (the 2021 refinancing date) and December 31, 2020, the Company had irrevocable letters of credit in the amount of $3.4 million with its lender to secure obligations under its self-insurance program.

Accounting for the 2019 ABL Credit Agreement

The Company incurred approximately $0.9 million of debt issuance costs for the 2019 ABL Credit Agreement that had been recorded as a non-current deferred asset. The deferred asset was amortized into interest expense over the term of the 2019 Term ABL Credit Agreement using the effective interest method and then expensed on the February 24, 2021 refinancing date as a loss on early debt extinguishment. The Company recorded $0.1 million of interest expense for the amortization of debt issuance costs for the six months ended June 30, 2021. The Company did not record any interest expense for the amortization of debt issuance costs for the three months ended June 30, 2021 as the debt issuance costs were extinguished as part of the debt refinancing on February 24, 2021. For both the three and six months ended June 30, 2020, the Company recorded $0.1 million of interest expense for the amortization of debt issuance costs.

Wintrust Term and Revolving Loans

On February 24, 2021, LFS, LHLLC and the direct and indirect subsidiaries of LFS from time to time included as parties to the agreement (the “Wintrust Guarantors”) entered into a Credit Agreement (the “Credit Agreement”) by and among the LFS, LHLLC, Wintrust Guarantors, the lenders party thereto from time to time, Wheaton Bank & Trust Company, N.A., a subsidiary of Wintrust Financial Corporation (collectively, “Wintrust”), as administrative agent and L/C issuer, Bank of the West as documentation agent, M&T Bank as syndication agent, and Wintrust as lead arranger and sole book runner.

In accordance with the terms of the Credit Agreement, Lenders provide to LFS (i) a $30.0 million senior secured term loan (the “Wintrust Term Loan”); and (ii) a $25.0 million senior secured revolving credit facility with a $5.0 million sublimit for the issuance of letters of credit (the “Wintrust Revolving Loan” and, together with the Wintrust Term Loan, the “Wintrust Loans”). Proceeds of the Wintrust Loans were used to refinance certain existing indebtedness, finance working capital and other general corporate purposes and fund certain fees and expenses associated with the closing of the Wintrust Loans.

The Wintrust Revolving Loan bears interest, at the LFS’s option, at either LIBOR (with a 0.25% floor) plus 3.5% or a base rate (with a 3.0% floor) plus 0.50%, subject to a 50 basis point step-down based on the ratio between the senior debt of the Company and its subsidiaries to the EBITDA (earnings before interest, income taxes, depreciation and amortization) of the LFS and its subsidiaries for the most recently ended four fiscal quarters (the “Senior Leverage Ratio”). The Wintrust Term Loan bears interest, at LFS’s option, at either LIBOR (with a 0.25% floor) plus 4.0% or a base rate (with a 3.0% floor) plus 1.00%, subject to a 50 (for LIBOR) or 75 (for base rate) basis point step-down based on the Senior Leverage Ratio.

LFS is required to make principal payments on the Wintrust Term Loan in $0.5 million installments on the last business day of each month commencing on March 31, 2021 with a final payment of all principal and interest not sooner paid on the Wintrust Term Loan due and payable on February 24, 2026. The Wintrust Revolving Loan will mature and become due and payable by LFS on February 24, 2026.

The Wintrust Loans are secured by (i) a valid, perfected and enforceable lien of the administrative agent on the ownership interests held by each of LFS and Wintrust Guarantors in their respective subsidiaries; and (ii) a valid, perfected and enforceable lien of the administrative agent on each of LFS and Wintrust Guarantors’ personal property, fixtures and real estate, subject to certain exceptions and limitations. Additionally, the re-payment of the Wintrust Loans shall be jointly and severally guaranteed by each Wintrust Guarantor.

16

The Credit Agreement contains representations and warranties, covenants and events of default that are customary for facilities of this type, as more particularly described in the Credit Agreement. The Wintrust Loans also contain three financial maintenance covenants, including (i) a requirement to have as of the last day of each quarter for the senior leverage ratio of the Company and its subsidiaries not to exceed an amount beginning at 2.25 to 1.00 through December 31, 2021, and stepping down to 2.00 to 1.00 at all times thereafter, (ii) a fixed charge coverage ratio of not less than 1.20 to 1.00 as of the last day of each fiscal quarter commencing with the fiscal quarter ending March 31, 2021, and (iii) no unfinanced capital expenditures, except for unfinanced capital expenditures in the ordinary course of business not exceeding in the aggregate $4.0 million during any fiscal year; and no default or event of default (as defined by the agreement) has occurred and is continuing, 50% of any portion of this annual limit, if not expended in the fiscal year for which it is permitted, may be carried over for expenditure in the next following fiscal year as stipulated by the agreement. LFS and its affiliates maintain various commercial and service relationships with certain members of the syndicate and their affiliates in the ordinary course of business. As of June 30, 2021, the Company was in compliance with all financial maintenance covenants as required by the Wintrust Loans.

The following is a summary of the additional margin and commitment fees payable on the available Wintrust Term Loan and Wintrust Revolving Loan credit commitment:

Level	Senior Leverage Ratio	Additional Margin for Prime Rate loans		Additional Margin for Prime Revolving loans		Additional Margin for Eurodollar Term loans		Additional Margin for Eurodollar Revolving loans		Commitment Fee
I	Greater than 1.00 to 1.00	1.00	%	0.50	%	4.00	%	3.50	%	0.25	%
II	Less than or equal to 1.00 to 1.00	0.25	%	—	%	3.50	%	3.00	%	0.25	%

At June 30, 2021, the interest rate in effect on the Wintrust Term Loan was 4.25% and the interest rate in effect on the Wintrust Revolving Loan was 3.75%.

At June 30, 2021, the Company had irrevocable letters of credit in the amount of $3.4 million with its lender to secure obligations under its self-insurance program.

Note 8 – Equity

The Company’s second amended and restated certificate of incorporation currently authorizes the issuance of 100,000,000 shares of common stock, par value $0.0001, and 1,000,000 shares of preferred stock, par value $0.0001. The Public, Private and $15 Exercise Price Sponsor warrants were issued in conjunction with the Company's initial public offering and the Merger and Additional Merger warrants were issued in conjunction with the business combination with LHLLC.

	June 30, 2021	December 31, 2020
Public Warrants(1)(5)	2,140,219	2,300,000
Private Warrants(1)(5)	99,000	99,000
$15 Exercise Price Sponsor Warrants(2)(5)	600,000	600,000
Merger Warrants(3)(6)	629,643	631,119
Additional Merger Warrants(4)(6)	935,068	946,680
Total	4,403,930	4,576,799

(1) Exercisable for one-half of one share of common stock at an exercise price of $5.75 per half share ($11.50 per whole share)

(2) Exercisable for one share of common stock at an exercise price of $15.00 per share

(3) Exercisable for one share of common share at an exercise price of $12.50 per share

(4) Exercisable for one share of common stock at an exercise price of $11.50 per share

(5) Issued under a warrant agreement dated July 15, 2014, between Continental Stock Transfer and Trust Company, as warrant agent, and the Company

(6) Issued to the sellers of LHLLC

Subsequent to June 30, 2021, on July 20, 2021, the Public Warrants, Private Warrants, and Additional Merger Warrants expired by their terms.

17

On May 24, 2020 the Board of Directors approved further amendments to the Company's amended and restated Omnibus Incentive Plan to increase the number of shares of the Company's common stock that may be issued pursuant to awards by 500,000, for a total of 1,650,000 shares, and extend the term of the plan so that it will expire on the tenth anniversary of the date the stockholders approve the Amended Incentive Plan. The amendments were approved by the Company's stockholders at the Annual Meeting held on July 14, 2020.

On March 9, 2021, the Board of Directors approved further amendments to the Company's amended and restated Omnibus Incentive Plan to increase the number of shares of the Company's common stock that may be issued pursuant to awards by 600,000, for a total of 2,250,000 shares, and extend the term of the plan so that it will expire on the tenth anniversary of the date the stockholders approve the Amended Incentive Plan. The amendments were approved by the Company's stockholders at the Annual Meeting held on June 16, 2021.

See Note 17 - Management Incentive Plans for RSUs granted, vested, forfeited and remaining unvested.

Upon approval of the Company's stockholders on May 30, 2019, the Company adopted the Limbach Holdings, Inc. 2019 Employee Stock Purchase Plan (“the ESPP”). On January 1, 2020, the ESPP went into effect. The ESPP enables eligible employees, as defined by the ESPP, the right to purchase the Company's common stock through payroll deductions during consecutive subscription periods at a purchase price of not less than 85% of the fair market value of a common share at the end of each offering period. Annual purchases by participants are limited to the number of whole shares that can be purchased by an amount equal to ten percent of the participant's compensation or $5,000, whichever is less. Each offering period of the ESPP lasts six months, commencing on January 1 and July 1 of each year.  The amounts collected from participants during a subscription period are used on the exercise date to purchase full shares of common stock.  Participants may withdraw from an offering before the exercise date and obtain a refund of amounts withheld through payroll deductions. Compensation cost, representing the 15% discount applied to the fair market value of common stock, is recognized on a straight-line basis over the six-month vesting period during which employees perform related services. Under the ESPP, 500,000 shares are authorized to be issued. In July 2020 and January 2021, the Company issued 30,825 and 8,928 shares of its common stock, respectively, to participants in the ESPP who contributed to the plan through the June 30, 2020 and December 31, 2020 offering periods, respectively.

On February 10, 2021 the Company entered into an underwriting agreement (“Underwriting Agreement”) with Lake Street Capital Markets, LLC (“Underwriter”) relating to an underwritten public offering (the “Offering”). On February 12, 2021 the Company sold to the Underwriter 1,783,500 shares of its Common Stock. The Underwriting Agreement provided for purchase and sale of the Shares by the company to the Underwriter at a price of $11.28 per share. The price to the public in the Offering was $12.00 per share. In addition, under the terms of the Underwriting Agreement, the Company granted the Underwriter a 30-day option to purchase up to an additional 267,525 shares of Common Stock to cover over-allotments, if any, on the same terms and conditions. The net proceeds to the Company from the Offering after deducting the underwriting discounts and commissions were approximately $19.8 million. On February 18, 2021, the Company received approximately $3.0 million of net proceeds for the sale of 267,525 shares in connection with the exercise of the over-allotment option.

Note 9 – Fair Value Measurements

The Company measures the fair value of financial assets and liabilities in accordance with ASC Topic 820 – Fair Value Measurements and Disclosures, which defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC Topic 820 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value and requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to measurements involving significant unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

•Level 1 — inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that are accessible at the measurement date;

•Level 2 — inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities; and

•Level 3 — unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

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The Company believes that the carrying amounts of its financial instruments, including cash and cash equivalents, trade accounts receivable and accounts payable consist primarily of instruments without extended maturities, which approximate fair value primarily due to their short-term maturities and low risk of counterparty default. We also believe that the carrying value of the 2019 Refinancing Agreement term loan and 2021 Wintrust Term Loan approximates its fair values due to the variable rate on such debt. As of February 24, 2021 and December 31, 2020, the Company determined that the fair value of its 2019 Revolving Agreement term loan was $39.0 million. As of June 30, 2021, the Company determined that the fair value of its 2021 Wintrust Term Loan was $28.0 million. There were no outstanding borrowings on the Company's 2019 ABL Credit Agreement revolver at February 24, 2021 and December 31, 2020. Such fair values were determined using discounted estimated future cash flows using level 3 inputs.

Note 10 – Earnings per Share

Diluted EPS assumes the dilutive effect of outstanding common stock warrants and RSUs using the treasury stock method.

	Three months ended June 30,				Six months ended June 30,
(in thousands, except per share amounts)	2021		2020		2021		2020
EPS numerator:
Net income (loss)	$	732	$	2,947	$	(1,550)	$	2,895
EPS denominator:
Weighted average shares outstanding – basic	10,252		7,846		9,738		7,822
Impact of dilutive securities	217		59		—		56
Weighted average shares outstanding – diluted	10,469		7,905		9,738		7,878
EPS:
Basic	$	0.07	$	0.38	$	(0.16)	$	0.37
Diluted	$	0.07	$	0.37	$	(0.16)	$	0.37

The following table summarizes the securities that were antidilutive or out-of-the-money, and therefore, were not included in the computations of diluted loss per common share:

	Three months ended June 30,		Six months ended June 30,
	2021	2020	2021	2020
In-the-money warrants	—	—	—	—
Out-of-the-money warrants (see Note 8)	4,403,930	4,576,799	4,403,930	4,576,799
Service-based RSUs (See Note 17)	334	463	142,120	1,255
Performance and market-based RSUs(1)	13,929	9,674	79,971	—
Employee Stock Purchase Plan	—	—	4,778	—
Total	4,418,193	4,586,936	4,630,799	4,578,054

(1) For the three and six months ended June 30, 2021 and 2020, certain PRSU and MRSU awards were not included in the computation of diluted loss per share because the performance and market conditions were not satisfied during the periods and would not be satisfied if the reporting date was at the end of the contingency period.

Note 11 – Income Taxes

The Company is taxed as a C corporation.

For interim periods, the provision for income taxes (including federal, state, local and foreign taxes) is calculated based on the estimated annual effective tax rate, adjusted for certain discrete items for the full fiscal year. Cumulative adjustments to the Company's estimate are recorded in the interim period in which a change in the estimated annual effective rate is determined.

19

Each quarter we update our estimate of the annual effective tax rate, and if our estimated tax rate changes, we make a cumulative adjustment.

The Company had an effective tax rate of 26.5% and an effective tax benefit rate of 33.2% for the three and six months ended June 30, 2021, respectively. For the three and six months ended June 30, 2020, the Company had an income tax rate of 27.4% and 14.1%, respectively.

No valuation allowance was required as of June 30, 2021 or December 31, 2020.

The Company had previously recorded a liability for unrecognized tax benefits (“UTB”) related to tax positions taken on its various income tax returns in open tax periods. If recognized, a portion of unrecognized tax benefits would favorably impact the effective tax rate that is reported in future periods. The Company filed to change an improper tax method of accounting in the fourth quarter of 2020 related to the UTB that affords the Company IRS audit protection in past periods. Therefore, the total unrecognized tax benefits were reduced in the fourth quarter of 2020.

The following is a reconciliation of the beginning and ending unrecognized tax benefits:

	June 30, 2021		December 31, 2020
Balance at beginning of period	$	—	$	1,130
Gross increases in prior period tax positions	—		—
Gross increases in current period tax positions	—		—
Decreases related to prior year tax positions	—		(1,130)
Balance at end of period	$	—	$	—

Note 12 – Operating Segments

The Company determined its operating segments on the same basis that it assesses performance and makes operating decisions. The Company manages and measures the performance of its business in two distinct operating segments. As of January 1, 2021, the Company renamed its existing two reportable segments to reflect its two distinct approaches to our customer base and to better align with our owner direct strategy. The previously named Construction Segment is now known as General Contractor Relationships (“GCR”); the previously named Service Segment is now known as Owner Direct Relationships (“ODR”). These segments are reflective of how the Company’s Chief Operating Decision Maker (“CODM”) reviews operating results for the purposes of allocating resources and assessing performance. The Company's CODM is comprised of its Chief Executive Officer, Chief Financial Officer and Chief Operating Officer.

The accounting policies of the segments are the same as those described in the summary of significant accounting policies. The CODM evaluates performance based on income from operations of the respective segments after the allocation of corporate office operating expenses. In accordance with ASC Topic 280 – Segment Reporting, the Company has elected to aggregate all of the construction activity into one GCR reportable segment and all of the service branches into one ODR reportable segment. All transactions between segments are eliminated in consolidation. Our corporate department provides general and administrative support services to our two operating segments. The CODM allocates costs between segments for selling, general and administrative and depreciation expense.

All of the Company’s identifiable assets are located in the United States, which is where the Company is domiciled. Interest expense is not allocated to segments because of the corporate management of debt service including interest.

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Condensed consolidated segment information for the three months ended June 30, 2021 and 2020 is as follows:

	Three months ended June 30,
(in thousands)	2021		2020
Statement of Operations Data:
Revenue:
GCR	$	87,550	$	105,937
ODR	33,469		29,248
Total revenue	121,019		135,185
Gross profit:
GCR	8,885		12,213
ODR	9,805		8,122
Total gross profit	18,690		20,335
Selling, general and administrative:
GCR	9,070		8,024
ODR	7,526		5,588
Corporate	636		140
Total selling, general and administrative	17,232		13,752
Amortization of intangibles	104		274
Operating income	$	1,354	$	6,309
Operating income for reportable segments	$	1,354	$	6,309
Less unallocated amounts:
Interest expense, net	(452)		(2,137)
Gain (loss) on disposition of property and equipment	94		(13)
Loss on change in fair value of warrant liability	—		(102)
Total unallocated amounts	(358)		(2,252)
Income before income taxes	$	996	$	4,057
Other Data:
Depreciation and amortization:
GCR	$	1,020	$	1,032
ODR	345		330
Corporate	104		274
Total other data	$	1,469	$	1,636

Summarized segment information is as follows:

	Three months ended June 30, 2021						Three months ended June 30, 2020
(in thousands)	GCR		ODR		Total		GCR		ODR		Total
Revenue	$	87,550	$	33,469	$	121,019	$	105,937	$	29,248	$	135,185
Gross Profit	8,885		9,805		18,690		12,213		8,122		20,335
Selling, general and administrative	9,070		7,526		16,596		8,024		5,588		13,612
EBIT	$	(185)	$	2,279	$	2,094	$	4,189	$	2,534	$	6,723

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Reconciliation of segment gross profit to income before income taxes:

	Three months ended June 30,
(in thousands)	2021		2020
Total gross profit from reportable segments	$	18,690	$	20,335
Selling, general and administrative	(17,232)		(13,752)
Amortization of intangibles	(104)		(274)
Total other expenses	(358)		(2,252)
Income before income taxes	$	996	$	4,057

Condensed consolidated segment information for the six months ended June 30, 2021 and 2020 is as follows:

	Six months ended June 30,
(in thousands)	2021		2020
Statement of Operations Data:
Revenue:
GCR	$	172,354	$	215,423
ODR	62,009		58,534
Total revenue	234,363		273,957
Gross profit:
GCR	18,280		23,195
ODR	17,639		15,364
Total gross profit	35,919		38,559
Selling, general and administrative:
GCR	18,184		18,200
ODR	14,880		11,917
Corporate	1,313		435
Total selling, general and administrative	34,377		30,552
Amortization of intangibles	208		417
Operating income	$	1,334	$	7,590
Operating income for reportable segments	$	1,334	$	7,590
Less unallocated amounts:
Interest expense, net	(1,716)		(4,295)
Gain on disposition of property and equipment	8		17
Loss on early debt extinguishment	(1,961)		—
Gain on change in fair value of warrant liability	14		59
Total unallocated amounts	(3,655)		(4,219)
(Loss) income before income taxes	$	(2,321)	$	3,371
Other Data:
Depreciation and amortization:
GCR	$	2,056	$	2,062
ODR	700		661
Corporate	208		417
Total other data	$	2,964	$	3,140

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Summarized segment information is as follows:

	Six months ended June 30, 2021						Six months ended June 30, 2020
(in thousands)	GCR		ODR		Total		GCR		ODR		Total
Revenue	$	172,354	$	62,009	$	234,363	$	215,423	$	58,534	$	273,957
Gross Profit	18,280		17,639		35,919		23,195		15,364		38,559
Selling, general and administrative	18,184		14,880		33,064		18,200		11,917		30,117
EBIT	$	96	$	2,759	$	2,855	$	4,995	$	3,447	$	8,442

Reconciliation of segment gross profit to (loss) income before income taxes:

	Six months ended June 30,
(in thousands)	2021		2020
Total gross profit from reportable segments	$	35,919	$	38,559
Selling, general and administrative	(34,377)		(30,552)
Amortization of intangibles	(208)		(417)
Total other expenses	(3,655)		(4,219)
(Loss) income before income taxes	$	(2,321)	$	3,371

Note 13 - Leases

The Company leases real estate, trucks and other equipment. The determination of whether an arrangement is, or contains, a lease is performed at the inception of the arrangement. Classification and initial measurement of the right-of-use asset and lease liability are determined at the lease commencement date. The Company elected the short-term lease measurement and recognition exemption; therefore, leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheets.

The Company's arrangements include certain non-lease components such as common area and other maintenance for leased real estate, as well as mileage, fuel and maintenance costs related to leased vehicles. For all leased asset classes, the Company has elected to not separate non-lease components from lease components and will account for each separate lease component and non-lease component associated with the lease as a single lease component. The Company does not guarantee any residual value in its lease agreements, and there are no material restrictions or covenants imposed by lease arrangements. Real estate leases typically include one or more options to extend the lease. The Company regularly evaluates the renewal options, and when they are reasonably certain of exercise, the Company includes the renewal period in its lease term. For our leased vehicles, the Company uses the interest rate implicit in its leases with the lessor to discount lease payments at the lease commencement date. When the implicit rate is not readily available, as is the case with our real estate leases, the Company uses quoted borrowing rates on our secured debt.

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The following table summarizes the lease amounts included in our condensed consolidated balance sheets:

(in thousands)	Classification on the Condensed Consolidated Balance Sheets	June 30, 2021		December 31, 2020
Assets
Operating	Operating lease right-of-use assets (a)	$	16,852	$	18,751
Finance	Property and equipment, net (b)	5,251		6,242
Total lease assets		$	22,103	$	24,993
Liabilities
Current
Operating	Current operating lease liabilities	$	4,122	$	3,929
Finance	Current portion of long-term debt	2,454		2,536
Noncurrent
Operating	Long-term operating lease liabilities	13,454		15,459
Finance	Long-term debt	3,022		3,923
Total lease liabilities		$	23,052	$	25,847

(a) Operating lease assets are recorded net of accumulated amortization of $13.9 million at June 30, 2021 and $11.9 million at December 31, 2020.

(b) Finance lease assets are recorded net of accumulated amortization of $5.6 million at June 30, 2021 and $5.3 million at December 31, 2020.

The following table summarizes the lease costs included in our condensed consolidated statements of operations for the three and six months ended June 30, 2021 and 2020:

		Three months ended June 30,				Six months ended June 30,
(in thousands)	Classification on the Condensed Consolidated Statement of Operations	2021		2020		2021		2020
Operating lease cost	Cost of revenue(a)	$	685	$	893	$	1,375	$	1,777
Operating lease cost	Selling, general and administrative(a)	584		376		1,169		757
Finance lease cost
Amortization	Cost of revenue(b)	652		645		1,327		1,311
Interest	Interest expense, net(b)	78		86		164		179
Total lease cost		$	1,999	$	2,000	$	4,035	$	4,024

(a)    Operating lease costs recorded in cost of sales includes $0.1 million and $0.2 million of variable lease costs for the three and six months ended June 30, 2021, respectively, and $0.1 million and $0.4 million for the three and six months ended June 30, 2020, respectively. In addition, $0.1 million and $0.2 million of variable leases costs are included in Selling, general and administrative for the three and six months ended June 30, 2021, respectively, and $0.1 million for both the three and six months ended June 30, 2020. These variable costs consist of our proportionate share of operating expenses, real estate taxes and utilities.

(b)     Finance lease costs recorded in cost of revenue include variable lease costs of $0.7 million and $1.3 million for the three and six months ended June 30, 2021, respectively, and $0.5 million and $1.2 million for the three and six months ended June 30, 2020, respectively. These variable lease costs consist of fuel, maintenance, and sales tax charges. No variable lease costs for finance leases were recorded in selling, general and administrative.

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Future minimum commitments for finance and operating leases that have non-cancelable lease terms in excess of one year as of June 30, 2021 were as follows:

Year ending (in thousands):	Finance Leases		Operating Leases
Remainder of 2021	$	1,401	$	2,479
2022	2,404		4,616
2023	1,409		3,516
2024	598		2,917
2025	50		2,409
Thereafter	—		4,043
Total minimum lease payments	$	5,862	$	19,980
Amounts representing interest	(386)
Present value of net minimum lease payments	$	5,476

The following is a summary of the lease terms and discount rates:

	June 30, 2021		December 31, 2020
Weighted average lease term (in years):
Operating	5.15		5.48
Finance	2.49		2.78
Weighted average discount rate:
Operating	4.84	%	4.83	%
Finance	5.45	%	5.50	%

The following is a summary of other information and supplemental cash flow information related to finance and operating leases:

	Six months ended June 30,
(in thousands)	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	2,456	$	2,910
Operating cash flows from finance leases	164		179
Financing cash flows from finance leases	1,318		1,285
Right-of-use assets exchanged for lease liabilities:
Operating leases	$	156	$	—
Finance leases	336		1,050
Right-of-use assets disposed or adjusted modifying operating leases liabilities	$	36	$	586
Right-of-use assets disposed or adjusted modifying finance leases liabilities	$	—	$	(64)

25

Note 14 – Self-Insurance

The Company purchases workers’ compensation and general liability insurance under policies with per-incident deductibles of $250 thousand and a $4.4 million maximum aggregate deductible loss limit per year.

The components of the self-insurance liability as of June 30, 2021 and December 31, 2020 are as follows:

(in thousands)	June 30, 2021		December 31, 2020
Current liability — workers’ compensation and general liability	$	105	$	197
Current liability — medical and dental	511		764
Non-current liability	776		890
Total liability shown in Accrued expenses and other current liabilities	$	1,392	$	1,851
Restricted cash	$	113	$	113

The restricted cash balance represents an imprest cash balance set aside for the funding of workers' compensation and general liability insurance claims. This amount is replenished either when depleted or at the beginning of each month.

Note 15 – Commitments and Contingencies

Legal. The Company is continually engaged in administrative proceedings, arbitrations, and litigation with owners, general contractors, suppliers, and other unrelated parties, all arising in the ordinary courses of business. In the opinion of the Company’s management, the results of these actions will not have a material adverse effect on the financial position, results of operations, or cash flows of the Company.

On November 13, 2019, claimant, Lanzo Trenchless Technologies, Inc. - North, filed a Demand for Arbitration in the state of Michigan against the Company's wholly-owned subsidiary, Limbach Company LLC. The demand seeks damages in excess of $0.4 million based upon the allegation that Limbach breached a construction contract by improperly terminating Lanzo’s subcontract, and for withholding payment from Lanzo based upon deficient performance. Limbach has asserted a counterclaim seeking damages caused by Lanzo’s deficient performance. Lanzo has recently abandoned its claims and the parties are attempting to negotiate a consent judgement in Limbach's favor that will result in the matter being concluded.

On January 23, 2020, plaintiff, Bernards Bros. Inc., filed a complaint against Limbach Holdings, Inc. in Superior Court of the State of California for the County of Los Angeles against Limbach Holdings, Inc. The complaint alleges that our Southern California operations refused to honor a proposal made to Bernards to act as a subcontractor on a construction project, and that, as a result of the wrongful failure to honor the proposal, Bernards suffered damages in excess of $3.0 million, including alleged increased costs for hiring a different subcontractor to perform the work. The Company is vigorously defending the suit. A non-binding mediation is scheduled for August 19, 2021 and trial is currently expected to take place in February 2022.

On April 17, 2020, plaintiff, LA Excavating, Inc., filed a complaint against our wholly-owned subsidiary, Limbach Company LP, and several other parties, in Superior Court of the State of California, for the County of Los Angeles. The complaint seeks damages of approximately $1.0 million for alleged failure to pay contract balances and extra work ordered by Limbach, as well as seeks to enforce payment obligations under payment and stop notice release bonds. The Company disputes the allegations and intends to vigorously defend the suit, which is currently set for trial in November of 2021.

In July of 2020, plaintiff, Kimball Construction Co., Inc., filed a complaint against our wholly-owned subsidiary, Limbach Company LLC in circuit Court for Montgomery County, Maryland. The complaint seeks damages of approximately $1.7 million for alleged failure to pay contract balances and extra work, as well as to enforce payment obligations under a payment bond issued by Limbach's surety provider. The Company and Kimball have reached a cooperative resolution of these claims, which resulted in a Stipulation of Dismissal of the suit on or about June 21, 2021.

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Surety. The terms of our construction contracts frequently require that we obtain from surety companies, and provide to our customers, payment and performance bonds (“Surety Bonds”) as a condition to the award of such contracts. The Surety Bonds secure our payment and performance obligations under such contracts, and we have agreed to indemnify the surety companies for amounts, if any, paid by them in respect of Surety Bonds issued on our behalf. In addition, at the request of labor unions representing certain of our employees, Surety Bonds are sometimes provided to secure obligations for wages and benefits payable to or for such employees. Public sector contracts require Surety Bonds more frequently than private sector contracts, and accordingly, our bonding requirements typically increase as the amount of public sector work increases. As of June 30, 2021, the Company had approximately $265.3 million in surety bonds outstanding. The Surety Bonds are issued by surety companies in return for premiums, which vary depending on the size and type of bond.

Collective Bargaining Agreements. Many of the Company’s craft labor employees are covered by collective bargaining agreements. The agreements require the Company to pay specified wages, provide certain benefits and contribute certain amounts to multi-employer pension plans. If the Company withdraws from any of the multi-employer pension plans or if the plans were to otherwise become underfunded, the Company could incur additional liabilities related to these plans. Although the Company has been informed that some of the multi-employer pension plans to which it contributes have been classified as “critical” status, the Company is not currently aware of any significant liabilities related to this issue.

Note 16 – Remaining Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and exclude unexercised contract options. The Company’s remaining performance obligations includes projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions.

As of June 30, 2021, the aggregate amount of the transaction prices allocated to the remaining performance obligations of the Company's GCR and ODR segment contracts were $378.9 million and $44.2 million, respectively. As of December 31, 2020, the aggregate amount of the transaction prices allocated to the remaining performance obligations of the Company's GCR and ODR segment contracts were $393.5 million and $35.7 million, respectively.

We estimate that 44% and 62% of our GCR and ODR segment remaining performance obligations as of June 30, 2021, respectively, will be recognized as revenue during 2021, with the substantial majority of remaining performance obligations to be recognized within 24 months, although the timing of the Company's performance is not always under its control.

Additionally, the difference between remaining performance obligations and backlog is due to the exclusion of a portion of the Company’s ODR agreements under certain contract types from the Company’s remaining performance obligations as these contracts can be canceled for convenience at any time by the Company or the customer without considerable cost incurred by the customer. Additional information related to backlog is provided in “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this Quarterly Report on Form 10-Q.

Note 17 – Management Incentive Plans

The Company initially adopted the Omnibus Incentive Plan on July 20, 2016 for the purpose of: (a) encouraging the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company’s objectives; (b) giving participants an incentive for excellence in individual performance; (c) promoting teamwork among participants; and (d) giving the Company a significant advantage in attracting and retaining key employees, directors and consultants. To accomplish such purposes, the Omnibus Incentive Plan provides that the Company may grant options, stock appreciation rights, restricted shares, restricted stock units, performance-based awards (including performance-based restricted shares and restricted stock units), other share based awards, other cash-based awards or any combination of the foregoing.

Following the further amendment and restatement of the Omnibus Incentive Plan upon approval of the Company's stockholders on June 16, 2021, the Company has reserved a total of 2,250,000 shares of its common stock for issuance under the Omnibus Incentive Plan. The number of shares issued or reserved pursuant to the Omnibus Incentive Plan will be adjusted by the plan administrator, as they deem appropriate and equitable, as a result of stock splits, stock dividends, and similar changes in the Company’s common stock. In connection with the grant of an award, the plan administrator may provide for the treatment of such award in the event of a change in control. All awards are made in the form of shares only.

Service-Based Awards

During the first six months of 2021, the Company granted 120,899 service-based RSUs to its executives, certain employees, and non-employee directors under the Omnibus Incentive Plan.

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The following table summarizes our service-based RSU activity for the six months ended June 30, 2021:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020	285,799	$	6.32
Granted	120,899	12.25
Vested	(106,383)	6.66
Forfeited	(2,333)	8.27
Unvested at June 30, 2021	297,982	$	8.59

Performance-Based Awards

During the first six months of 2021, the Company granted 185,367 performance-based RSUs (“PRSUs”) to its executives and certain employees under the Omnibus Incentive Plan. The Company will recognize stock-based compensation expense for these awards over the vesting period based on the projected probability of achievement of certain performance conditions as of the end of each reporting period during the performance period and may periodically adjust the recognition of such expense, as necessary, in response to any changes in the Company’s forecasts with respect to the performance conditions. For the three and six months ended June 30, 2021, the Company recognized $0.2 million and $0.4 million, respectively, of stock-based compensation expense related to outstanding PRSUs. For the three and six months ended June 30, 2020, the Company recognized $0.1 million of stock-based compensation expense related to outstanding PRSUs.

The following table summarizes our PRSU activity for the six months ended June 30, 2021:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020	99,500	$	4.23
Granted	185,367	12.26
Vested	—	—
Forfeited	(4,167)	8.92
Unvested at June 30, 2021	280,700	$	9.46

Market-Based Awards

On September 4, 2020, the Compensation Committee (the “Committee”) of the Board of Directors of the Company approved amendments to certain restricted stock units initially awarded on August 30, 2017 by the Company to certain employees. Pursuant to the amendment adopted on September 4, 2020, the measurement period was extended to July 16, 2022. In addition to the market performance-based vesting condition, the vesting of such restricted stock unit is subject to continued employment from August 1, 2017 through the later of July 31, 2019 or the date on which the Committee certifies the achievement of the performance goal. The Company has accounted for this amendment as a Type I modification and will recognize approximately $0.2 million of incremental stock-based compensation expense over 1.26 years based on an updated Monte Carlo simulation model.

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The following table summarizes our market-based RSU (“MRSUs”) activity for the six months ended June 30, 2021:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020	102,500	$	8.26
Granted	—	—
Vested	—	—
Forfeited	—	—
Unvested at June 30, 2021	102,500	$	8.26

Total recognized stock-based compensation expense amounted to $0.7 million and $1.3 million for the three and six months ended June 30, 2021, respectively, and $0.1 million and $0.4 million for the three and six months ended June 30, 2020, respectively. The aggregate fair value as of the vest date of RSUs that vested during the six months ended June 30, 2021 and 2020 was $1.3 million and $0.6 million, respectively. Total unrecognized stock-based compensation expense related to unvested RSUs which are probable of vesting was $3.6 million at June 30, 2021. These costs are expected to be recognized over a weighted average period of 2.0 years.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion should be read in conjunction with the condensed consolidated financial statements and related notes thereto included elsewhere in this Quarterly Report on Form 10-Q. In addition to historical information, this discussion contains forward-looking statements that involve risks, uncertainties and assumptions that could cause actual results to differ materially from our management’s expectations. Factors that could cause such differences are discussed in “Forward-Looking Statements” and “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2020 and in subsequent Quarterly Reports on Form 10-Q. We assume no obligation to update any of these forward-looking statements.

Overview

We are an integrated building systems solutions firm whose expertise is in the design, modular prefabrication, installation, management and maintenance of heating, ventilation, and air conditioning (“HVAC”), mechanical, electrical, plumbing and control systems. Our market sectors primarily include the following: healthcare, life sciences, data centers, industrial and light manufacturing, entertainment, education and government. Our customers are primarily located throughout Florida, California, Massachusetts, New Jersey, Pennsylvania, Delaware, Maryland, Washington, D.C., Virginia, West Virginia, Ohio and Michigan. As of January 1, 2021, the Company renamed its existing two reportable segments to reflect our distinct approaches to our customer base and to better align with our owner direct strategy. The previously named Construction Segment is now known as General Contractor Relationships (“GCR”); the previously named Service Segment is now known as Owner Direct Relationships (“ODR”). The Company operates in two segments that are based on the relationship with its customer, (i) GCR, in which the Company generally manages new construction or renovation projects that involve primarily HVAC, plumbing or electrical services and are awarded to the Company by general contractors or construction managers and (ii) ODR, in which the Company provides maintenance or service primarily on HVAC, plumbing or electrical systems, building controls and specialty contracting projects direct to, or assigned by, building owners or property managers. This work is primarily performed under fixed price, modified fixed price, and time and material contracts over periods of typically less than two years.

Key Components of Condensed Consolidated Statements of Operations

Revenue

We generate revenue principally from fixed-price construction contracts to deliver HVAC, plumbing, and electrical construction services to our customers. The duration of our contracts generally ranges from six months to two years. Revenue from fixed price contracts is recognized on the cost-to-cost method, measured by the relationship of total cost incurred to total estimated contract costs. Revenue from time and materials contracts is recognized as services are performed. We believe that our extensive experience in HVAC, plumbing, and electrical projects, and our internal cost review procedures during the bidding process, enable us to reasonably estimate costs and mitigate the risk of cost overruns on fixed price contracts.

We generally invoice customers on a monthly basis, based on a schedule of values that breaks down the contract amount into discrete billing items. Costs and estimated earnings in excess of billings on uncompleted contracts are recorded as a contract asset until billable under the contract terms. Billings in excess of costs and estimated earnings on uncompleted contracts are recorded as a contract liability until the related revenue is recognizable.

Cost of Revenue

Cost of revenue primarily consists of the labor, equipment, material, subcontract, and other job costs in connection with fulfilling the terms of our contracts. Labor costs consist of wages plus taxes, fringe benefits, and insurance. Equipment costs consist of the ownership and operating costs of company-owned assets, in addition to outside-rented equipment. If applicable, job costs include estimated contract losses to be incurred in future periods. Due to the varied nature of our services, and the risks associated therewith, contract costs as a percentage of contract revenue have historically fluctuated and we expect this fluctuation to continue in future periods.

Selling, General and Administrative

Selling, general and administrative consist primarily of personnel costs for our administrative, estimating, human resources, safety, information technology, legal, finance and accounting employees and executives. Also included are non-personnel costs, such as travel-related expenses, legal and other professional fees and other corporate expenses to support the growth of our business and to meet the compliance requirements associated with operating as a public company. Those costs include accounting, human resources, information technology, legal personnel, additional consulting, legal and audit fees, insurance costs, board of directors’ compensation and the costs of achieving and maintaining compliance with Section 404 of the Sarbanes-Oxley Act.

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Amortization of Intangibles

Amortization expense represents periodic non-cash charges that consist of amortization of various intangible assets, primarily including leasehold interests and certain customer relationships in the ODR segment.

Other Income/Expense

Other income/expense, net consists primarily of interest expense incurred in connection with our debt, net of interest income, loss on early debt extinguishment, gain and loss on the sale of property and equipment and changes in fair value of warrant liability. Deferred financing costs are amortized to interest expense using the effective interest method.

Income Taxes

We are taxed as a C corporation and our financial results include the effects of federal income taxes which are paid at the parent level.

For interim periods, the provision for income taxes (including federal, state and local taxes) is calculated based on the estimated annual effective tax rate. The Company accounts for income taxes in accordance with ASC Topic 740 - Income Taxes, which requires the use of the asset and liability method. Under this method, deferred tax assets and liabilities and income or expense are recognized for the expected future tax consequences of temporary differences between the financial statement carrying values and their respective tax bases, using enacted tax rates expected to be applicable in the years in which the temporary differences are expected to reverse. Changes in deferred tax assets and liabilities are recorded in the provision for income taxes.

Operating Segments

As of January 1, 2021, the Company renamed its existing two reportable segments to reflect our two distinct approaches to our customer base and to better align with our owner direct strategy. The previously named Construction Segment is now known as General Contractor Relationships (“GCR”); the previously named Service Segment is now known as Owner Direct Relationships (“ODR”). We manage and measure the performance of our business in these two operating segments. These segments are reflective of how the Company’s Chief Operating Decision Makers (“CODM”) reviews its operating results for the purposes of allocating resources and assessing performance. Our CODM is comprised of our Chief Executive Officer, Chief Financial Officer and Chief Operating Officer.

The accounting policies of the segments are the same as those described in the summary of significant accounting policies. The CODM evaluates performance based on income from operations of the respective branches after the allocation of corporate office operating expenses. In accordance with ASC Topic 280 – Segment Reporting, the Company has elected to aggregate all of the GCR work performed at branches into one GCR reportable segment and all of the ODR work performed at branches into one ODR reportable segment. All transactions between segments are eliminated in consolidation. Our corporate department provides general and administrative support services to our two operating segments. We allocate costs between segments for selling, general and administrative and depreciation expense. Interest expense is not allocated to segments because of the corporate management of debt service. See Note 12 – Operating Segments in the notes to condensed consolidated financial statements.

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Comparison of Results of Operations for the three months ended June 30, 2021 and 2020

The following table presents operating results for the three months ended June 30, 2021 and 2020 in dollars and expressed as a percentage of total revenue (except as indicated below), as compared below:

	Three months ended June 30,
	2021					2020
(in thousands except for percentages)
Statement of Operations Data:
Revenue:
GCR	$	87,550	72.3	%		$	105,937	78.4	%
ODR	33,469		27.7	%		29,248		21.6	%
Total revenue	121,019		100.0	%		135,185		100.0	%
Gross profit:
GCR	8,885		10.1	%	(1)	12,213		11.5	%	(1)
ODR	9,805		29.3	%	(2)	8,122		27.8	%	(2)
Total gross profit	18,690		15.4	%		20,335		15.0	%
Selling, general and administrative:
GCR	9,070		10.4	%	(1)	8,024		7.6	%	(1)
ODR	7,526		22.5	%	(2)	5,588		19.1	%	(2)
Corporate	636		0.5	%		140		0.1	%
Total selling, general and administrative	17,232		14.2	%		13,752		10.2	%
Amortization of intangibles (Corporate)	104		0.1	%		274		0.2	%
Operating (loss) income:
GCR	(185)		(0.2)	%	(1)	4,189		4.0	%	(1)
ODR	2,279		6.8	%	(2)	2,534		8.7	%	(2)
Corporate	(740)		—	%		(414)		—	%
Total operating income	1,354		1.1	%		6,309		4.7	%
Other expenses (Corporate)	(358)		(0.3)	%		(2,252)		(1.7)	%
Total consolidated income before income taxes	996		0.8	%		4,057		3.0	%
Income tax provision	264		0.2	%		1,110		0.8	%
Net income	$	732	0.6	%		$	2,947	2.2	%

(1)As a percentage of GCR revenue.

(2)As a percentage of ODR revenue.

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Revenue

	Three months ended June 30,
	2021		2020		Increase/(Decrease)
(in thousands except for percentages)
Revenue:
GCR	$	87,550	$	105,937	$	(18,387)	(17.4)	%
ODR	33,469		29,248		4,221		14.4	%
Total revenue	$	121,019	$	135,185	$	(14,166)	(10.5)	%

Revenue for the three months ended June 30, 2021 decreased by $14.2 million compared to the revenue for the three months ended June 30, 2020. GCR revenue decreased by $18.4 million, or 17.4%, while ODR revenue increased by $4.2 million, or 14.4%. GCR segment revenue of $87.6 million decreased due to a planned decrease in the Southern California operating region and other decreases in the Florida, Eastern Pennsylvania and Ohio operating regions. These decreases were partially offset by revenue increases in the New England and Michigan operating regions largely due to the start of new projects and the continuation of work on existing projects. Ohio, Michigan, and Eastern Pennsylvania regions' ODR revenue increased quarter over quarter offset by declines in ODR revenue in Florida and Mid-Atlantic. Maintenance contract revenue, a component of ODR revenue, increased by $0.3 million compared to June 30, 2020.

Gross Profit

	Three months ended June 30,
	2021			2020			Increase/(Decrease)
(in thousands except for percentages)
Gross Profit:
GCR	$	8,885		$	12,213		$	(3,328)	(27.2)	%
ODR	9,805			8,122			1,683		20.7	%
Total gross profit	$	18,690		$	20,335		$	(1,645)	(8.1)	%
Total gross profit as a percentage of consolidated total revenue	15.4		%	15.0		%

Our gross profit for the three months ended June 30, 2021 decreased by $1.6 million compared to our gross profit for the three months ended June 30, 2020. GCR gross profit decreased $3.3 million, or 27.2%, largely due to lower revenue at reduced margins. ODR gross profit increased $1.7 million, or 20.7%, due to an increase in revenue at higher margins. The total gross profit percentage increased from 15.0% for the three months ended June 30, 2020 to 15.4% for the same period ended in 2021, mainly driven by the mix of higher margin ODR segment work.

We recorded revisions in our contract estimates for certain GCR and ODR projects. For the three months ended June 30, 2021 and 2020, total net gross profit write-downs were $1.1 million and $2.0 million, respectively. For projects having a material gross profit impact of $0.25 million or more for the three months ended June 30, 2021, this resulted in material gross profit write downs on three GCR segment projects of $1.7 million and one ODR project for $0.3 million. Of the material GCR segment write downs, one project was within the Michigan region for a total of $1.0 million, one project was within the New England region for $0.3 million and one project was within the Southern California region for $0.4 million. Of the material ODR segment write downs, one project was within the Eastern Pennsylvania region for $0.3 million. We also recorded material gross profit write ups of $0.3 million on one GCR segment project in the Florida region and $0.3 million on one ODR segment project in the Michigan region. For the three months ended June 30, 2020, we recorded material revisions in our contract estimates on four GCR projects which resulted in gross profit write downs of $1.5 million. Two of these projects were within the Southern California region for a total of $0.7 million. No project revisions resulting in material gross profit write ups were recorded during the three months ended June 30, 2020.

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Selling, General and Administrative

	Three months ended June 30,
	2021			2020			Increase/(Decrease)
(in thousands except for percentages)
Selling, general and administrative:
GCR	$	9,070		$	8,024		$	1,046	13.0	%
ODR	7,526			5,588			1,938		34.7	%
Corporate	636			140			496		354.3	%
Total selling, general and administrative	$	17,232		$	13,752		$	3,480	25.3	%
Selling, general and administrative as a percentage of consolidated total revenue	14.2		%	10.2		%

Our total selling, general and administrative (“SG&A”) increased by approximately $3.5 million to $17.2 million for the three months ended June 30, 2021 compared to $13.8 million for the three months ended June 30, 2020. Total SG&A increased due to $0.6 million in additional payroll expenses, a $0.5 million increase in professional fees, a $0.4 million increase in rent, a $0.5 million increase in travel and entertainment, and a $0.5 million increase in stock based compensation expense. Our payroll and travel and entertainment expenses during the three months ended June 30, 2021 were higher than the three months ended June 30, 2020 due to pandemic-driven operational reductions in 2020 and our continued investment in ODR expansion in 2021. Additionally, total SG&A as a percentage of revenues were 14.2% for the three months ended June 30, 2021 and 10.2% for the three months ended June 30, 2020.

Amortization of Intangibles

	Three months ended June 30,
	2021		2020		Increase/(Decrease)
(in thousands except for percentages)
Amortization of intangibles (Corporate)	$	104	$	274	$	(170)	(62.0)	%

Total amortization expense for the three months ended June 30, 2021 was $0.1 million as compared to $0.2 million for the three months ended June 30, 2020.

Other Expenses

	Three months ended June 30,
	2021		2020		Increase/(Decrease)
(in thousands except for percentages)
Other income (expenses):
Interest expense, net	$	(452)	$	(2,137)	$	1,685	(78.8)	%
Gain (loss) on disposition of property and equipment	94		(13)		107		(823.1)	%
Loss on change in fair value of warrant liability	—		(102)		102		(100.0)	%
Total other expenses	$	(358)	$	(2,252)	$	1,894	(84.1)	%

Other income (expenses) consist of interest expense of $0.5 million for the three months ended June 30, 2021 as compared to $2.1 million of interest expense for the three months ended June 30, 2020. The reduction in interest expense year over year is due to the refinancing of the higher interest rate debt with a lower interest rate debt instrument in late February 2021.

Income Taxes

The Company recorded a $0.3 million and $1.1 million income tax provision for the three months ended June 30, 2021 and 2020, respectively.

The effective tax rate was 26.5% and 27.4% for the three months ended June 30, 2021 and 2020, respectively.

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Comparison of Results of Operations for the six months ended June 30, 2021 and 2020

The following table presents operating results for the six months ended June 30, 2021 and 2020 in dollars and expressed as a percentage of total revenue (except as indicated below), as compared below:

	Six months ended June 30,
	2021					2020
(in thousands except for percentages)
Statement of Operations Data:
Revenue:
GCR	$	172,354	73.5	%		$	215,423	78.6	%
ODR	62,009		26.5	%		58,534		21.4	%
Total revenue	234,363		100.0	%		273,957		100.0	%
Gross profit:
GCR	18,280		10.6	%	(1)	23,195		10.8	%	(1)
ODR	17,639		28.4	%	(2)	15,364		26.2	%	(2)
Total gross profit	35,919		15.3	%		38,559		14.1	%
Selling, general and administrative:
GCR	18,184		10.6	%	(1)	18,200		8.4	%	(1)
ODR	14,880		24.0	%	(2)	11,917		20.4	%	(2)
Corporate	1,313		0.6	%		435		0.2	%
Total selling, general and administrative	34,377		14.7	%		30,552		11.2	%
Amortization of intangibles (Corporate)	208		0.1	%		417		0.2	%
Operating (loss) income:
GCR	96		0.1	%	(1)	4,995		2.3	%	(1)
ODR	2,759		4.4	%	(2)	3,447		5.9	%	(2)
Corporate	(1,521)		—	%		(852)		—	%
Total operating income	1,334		0.6	%		7,590		2.8	%
Other expenses (Corporate)	(3,655)		(1.6)	%		(4,219)		(1.5)	%
Total consolidated (loss) income before income taxes	(2,321)		(1.0)	%		3,371		1.2	%
Income tax (benefit) provision	(771)		(0.3)	%		476		0.2	%
Net (loss) income	$	(1,550)	(0.7)	%		$	2,895	1.1	%

(1)As a percentage of GCR revenue.

(2)As a percentage of ODR revenue.

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Revenue

	Six months ended June 30,
	2021		2020		Increase/(Decrease)
(in thousands except for percentages)
Revenue:
GCR	$	172,354	$	215,423	$	(43,069)	(20.0)	%
ODR	62,009		58,534		3,475		5.9	%
Total revenue	$	234,363	$	273,957	$	(39,594)	(14.5)	%

Revenue for the six months ended June 30, 2021 decreased by $39.6 million compared to the revenue for the six months ended June 30, 2020. GCR revenue decreased by $43.1 million, or 20.0%, while ODR revenue increased by $3.5 million, or 5.9%. GCR segment revenue of $172.4 million decreased due to a planned decrease in the Southern California and Mid-Atlantic operating regions and other decreases in the Florida, Eastern Pennsylvania, Ohio, and Western Pennsylvania operating regions. These decreases were partially offset by revenue increases in the Michigan and New England operating regions largely due to the start of new projects and the continuation of work on existing projects. Ohio, Eastern Pennsylvania, Michigan, and New England regions' ODR revenue increased nearly offset by declines in ODR revenue in Florida and Mid-Atlantic. Maintenance contract revenue, a component of ODR revenue, increased by $0.4 million compared to the six months ended June 30, 2020.

Gross Profit

	Six months ended June 30,
	2021			2020			Increase/(Decrease)
(in thousands except for percentages)
Gross Profit:
GCR	$	18,280		$	23,195		$	(4,915)	(21.2)	%
ODR	17,639			15,364			2,275		14.8	%
Total gross profit	$	35,919		$	38,559		$	(2,640)	(6.8)	%
Total gross profit as a percentage of consolidated total revenue	15.3		%	14.1		%

Our gross profit for the six months ended June 30, 2021 decreased by $2.6 million compared to our gross profit for the six months ended June 30, 2020. GCR gross profit decreased $4.9 million, or 21.2%, largely due to lower revenue at slightly lower margins. ODR gross profit increased $2.3 million, or 14.8%, due to an increase in revenue at higher margins. The total gross profit percentage increased from 14.1% for the six months ended June 30, 2020 to 15.3% for the same period ended in 2021, mainly driven by the mix of higher margin ODR segment work.

For the six months ended June 30, 2021 and 2020, total net gross profit write-downs were $1.7 million and $3.4 million, respectively. For projects having a material gross profit impact of $0.25 million or more, we recorded gross profit write downs on eight GCR segment projects of $3.5 million and one ODR project for $0.3 million. Of the material GCR segment write downs, two projects were within the Michigan region for a total of $1.2 million, two projects were within the Eastern Pennsylvania region for $1.0 million, two projects were within the Southern California region for $0.8 million, one project was within the New England region for $0.3 million, and one project was within the Mid-Atlantic region for $0.3 million. We also materially wrote down one ODR segment project within the Eastern Pennsylvania region for $0.3 million. We also recorded material GCR segment gross profit write ups of $0.9 million on one GCR segment project in the Michigan region for $0.5 million and one project within the Ohio region for $0.4 million. For the six months ended June 30, 2020, we recorded material gross profit write downs on eight GCR projects and two gross profit write ups on GCR projects, for an aggregate revision of $5.2 million and $1.2 million, respectively.

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Selling, General and Administrative

	Six months ended June 30,
	2021			2020			Increase/(Decrease)
(in thousands except for percentages)
Selling, general and administrative:
GCR	$	18,184		$	18,200		$	(16)	(0.1)	%
ODR	14,880			11,917			2,963		24.9	%
Corporate	1,313			435			878		201.8	%
Total selling, general and administrative	$	34,377		$	30,552		$	3,825	12.5	%
Selling, general and administrative as a percentage of consolidated total revenue	14.7		%	11.2		%

Our total selling, general and administrative (“SG&A”) increased by approximately $3.8 million to $34.4 million for the six months ended June 30, 2021 compared to $30.6 million for the six months ended June 30, 2020. Total SG&A increased due to a $1.1 million increase in professional fees, a $0.8 million increase in rent and a $0.9 million increase in stock based compensation expense. Our payroll and travel and entertainment expenses remained flat during the six months ended June 30, 2021 compared to the six months ended June 30, 2020, as our investment in ODR expansion in 2021 was offset by severance expense incurred in 2020 due to our pandemic-driven operational reductions. Additionally, total SG&A as a percentage of revenues were 14.7% for the six months ended June 30, 2021 and 11.2% for the six months ended June 30, 2020.

Amortization of Intangibles

	Six months ended June 30,
	2021		2020		Increase/(Decrease)
(in thousands except for percentages)
Amortization of intangibles (Corporate)	$	208	$	417	$	(209)	(50.1)	%

Total amortization expense for the six months ended June 30, 2021 was $0.2 million compared to $0.4 million for the six months ended June 30, 2020.

Other Expenses

	Six months ended June 30,
	2021		2020		Increase/(Decrease)
(in thousands except for percentages)
Other income (expenses):
Interest expense, net	$	(1,716)	$	(4,295)	$	2,579	(60.0)	%
Gain on disposition of property and equipment	8		17		(9)		(52.9)	%
Loss on early debt extinguishment	(1,961)		—		(1,961)		100.0	%
Gain on change in fair value of warrant liability	14		59		(45)		(76.3)	%
Total other expenses	$	(3,655)	$	(4,219)	$	564	(13.4)	%

Other income (expenses) consist of interest expense of $1.7 million for the six months ended June 30, 2021 as compared to $4.3 million of interest expense for the six months ended June 30, 2020. The reduction in interest expense year over year is due to the refinancing of the higher interest rate debt with a lower interest rate debt instrument in late February 2021. The Company recognized a loss on early debt extinguishment of $2.0 million in connection with its refinancing of the 2019 Refinancing Term Loan and 2019 Revolving Credit Facility with the Wintrust Term Loan and Wintrust Revolving Loan.

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Income Taxes

The Company recorded a $0.8 million income tax benefit and a $0.5 million income tax provision for the six months ended June 30, 2021 and 2020, respectively.

The Company had a 33.2% effective tax benefit rate for the six months ended June 30, 2021 and a 14.1% effective tax rate for the six months ended June 30, 2020.

GCR and ODR Backlog Information

We refer to our estimated revenue on uncompleted contracts, including the amount of revenue on contracts for which work has not begun, less the revenue we have recognized under such contracts, as “backlog.” Backlog includes unexercised contract options. Our backlog includes projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions. Additionally, the difference between our backlog and remaining performance obligations is due to the portion of unexercised contract options that are excluded, under certain contract types, from our remaining performance obligations as these contracts can be canceled for convenience at any time by us or the customer without considerable cost incurred by the customer. Additional information related to our remaining performance obligations is provided in Note 16 — Remaining Performance Obligations in the accompanying notes to our condensed consolidated financial statements.

Given the multi-year duration of many of our contracts, revenue from backlog is expected to be earned over a period that will extend beyond one year. Our GCR backlog as of June 30, 2021 was $378.9 million compared to $393.5 million at December 31, 2020. In addition, ODR backlog as of June 30, 2021 was $60.6 million compared to $50.9 million at December 31, 2020. Of the total backlog at June 30, 2021, we expect to recognize approximately $211.0 million by the end of 2021.

Seasonality, Cyclicality and Quarterly Trends

Severe weather can impact our operations. In the northern climates where we operate, and to a lesser extent the southern climates as well, severe winters can slow our productivity on construction projects, which shifts revenue and gross profit recognition to a later period. Our maintenance operations may also be impacted by mild or severe weather. Mild weather tends to reduce demand for our maintenance services, whereas severe weather may increase the demand for our maintenance and spot services. Our operations also experience mild cyclicality, as building owners typically work through maintenance and capital projects at an increased level during the third and fourth calendar quarters of each year.

Effect of Inflation and Tariffs

The prices of products such as steel, pipe, copper and equipment from manufacturers are subject to fluctuation and increases. It is difficult to accurately measure the impact of inflation, tariffs and price escalation due to the imprecise nature of the estimates required. However, these effects are, at times, material to our results of operations and financial condition. During the first half of 2021, we have experienced higher cost of materials on specific projects and delays in our supply chain for equipment and service vehicles from the manufacturers, and we expect these higher costs and delays in our supply chain to persist through 2021. When appropriate, we include cost escalation factors into our bids and proposals as well as limit the acceptance time of our bid. In addition, we are often able to mitigate the impact of future price increases by entering into fixed price purchase orders for materials and equipment and subcontracts on our projects. Notwithstanding these efforts, if we experience significant disruptions to our supply chain, we may need to delay certain projects that would otherwise be accretive to our business and this may also impact the conversion rate of our current backlog into revenue.

Liquidity and Capital Resources

Cash Flows

Our liquidity needs relate primarily to the provision of working capital (defined as current assets less current liabilities) to support operations, funding of capital expenditures, and investment in strategic opportunities. Historically, liquidity has been provided by operating activities and borrowings from commercial banks and institutional lenders.

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The following table presents summary cash flow information for the periods indicated:

	Six months ended June 30,
	2021		2020
(in thousands)
Net cash (used in) provided by:
Operating activities	$	(24,609)	$	22,457
Investing activities	(140)		(597)
Financing activities	10,295		(1,375)
Net (decrease) increase in cash, cash equivalents and restricted cash	$	(14,454)	$	20,485
Noncash investing and financing transactions:
Right of use assets obtained in exchange for new operating lease liabilities	$	156	$	—
Right of use assets obtained in exchange for new finance lease liabilities	336		1,050
Right of use assets disposed or adjusted modifying operating lease liabilities	36		586
Right of use assets disposed or adjusted modifying finance lease liabilities	—		(64)
Interest paid	1,741		3,250
Cash paid for income taxes	$	2,096	$	734

Our cash flows are primarily impacted from period to period by fluctuations in working capital. Factors such as our contract mix, commercial terms, days sales outstanding (“DSO”) and delays in the start of projects may impact our working capital. In line with industry practice, we accumulate costs during a given month then bill those costs in the current month for many of our contracts. While labor costs associated with these contracts are paid weekly and salary costs associated with the contracts are paid bi-weekly, certain subcontractor costs are generally not paid until we receive payment from our customers (contractual “pay-if-paid” terms). We have not historically experienced a large volume of write-offs related to our receivables and contract assets. We regularly assess our receivables for collectability and provide allowances for doubtful accounts where appropriate. We believe that our reserves for doubtful accounts are appropriate as of June 30, 2021 and December 31, 2020, but adverse changes in the economic environment may impact certain of our customers’ ability to access capital and compensate us for our services, as well as impact project activity for the foreseeable future.

The Company's existing current backlog is projected to provide substantial coverage of forecasted GCR revenue for one year from the date of the financial statement issuance. Our current cash balance, together with cash we expect to generate from future operations along with borrowings available under our Wintrust Loans, are expected to be sufficient to finance our short- and long-term capital requirements (or meet working capital requirements) for the next twelve months. In addition to the future operating cash flows of the Company, along with its existing borrowing availability and access to financial markets, the Company believes it will be able to meet any working capital and future operating requirements, and capital investment forecast opportunities for the next twelve months.

The following table represents our summarized working capital information:

(in thousands, except ratios)	June 30, 2021		December 31, 2020
Current assets	$	199,726	$	199,417
Current liabilities	(137,924)		(150,294)
Net working capital	$	61,802	$	49,123
Current ratio*	1.45		1.33

*Current ratio is calculated by dividing current assets by current liabilities.

As discussed above and in Note 7 to the accompanying condensed consolidated financial statements, as of June 30, 2021, the Company was in compliance with all financial maintenance covenants as required by the Wintrust Loans.

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Cash Flows (Used in) Provided by Operating Activities

Cash flows used in operating activities were $24.6 million for the six months ended June 30, 2021 compared to cash flows provided by operating activities of $22.5 million for the six months ended June 30, 2020. For the six months ended June 30, 2021, cash used in operating activities were negatively impacted by an $8.9 million increase in accounts receivable, a $7.5 million decrease in contract liabilities, a $5.5 million decrease in accrued expenses and other current liabilities, and a $3.7 million increase in contract assets.

Cash flows provided by operating activities were $22.5 million for the six months ended June 30, 2020. For the six months ended June 30, 2020, the key components included cash inflows of $3.6 million related to our accounts receivable, $4.9 million related to our contract assets, $16.3 million for our contract liabilities shifting from an underbilled to an overbilled position consistent with our renewed focus on project cash flows and $9.4 million related to accrued expenses and other current liabilities. These cash inflows were offset by outflows of $19.5 million related to our accounts payable, including retainage.

The decrease in operating cash flows during the six months ended June 30, 2021 compared to the six months ended June 30, 2020 were mostly attributable to the reduction of our net overbilling position, which resulted in a $32.3 million cash outflow period-over-period, and a $12.5 million period-over-period cash outflow related to the change in accounts receivable. The decrease in our overbilled position was due to the reduction in GCR revenue and the timing of contract billings and the recognition of contract revenue. In addition, the reduction in accounts receivable was due to the timing of billings and collections.

Non-cash charges for depreciation and amortization were $3.0 million for the six months ended June 30, 2021 and $3.1 million for the six months ended June 30, 2020.

Cash Flows Used in Investing Activities

Cash flows used in investing activities were $0.1 million and $0.6 million for the six months ended June 30, 2021, and 2020, respectively. For the six months ended June 30, 2021, $0.5 million was used to purchase property and equipment, offset by $0.4 million in proceeds from the sale of property and equipment. For the six months ended June 30, 2020, $0.7 million was used to purchase property and equipment, offset by $0.1 million in proceeds from the sale of property and equipment.

The majority of our cash used for investing activities in both periods was for capital additions pertaining to tools and equipment, computer software and hardware purchases, office furniture and office related leasehold improvements.

Cash Flows Provided by (Used in) Financing Activities

Cash flows provided by financing activities were $10.3 million for the six months ended June 30, 2021 compared to cash flows used in financing activities of $1.4 million for the six months ended June 30, 2020. For the six months ended June 30, 2021, we received proceeds from the following: $22.8 million, net of fees and expenses, in conjunction with our common stock offering in February 2021, $2.0 million from the exercise of warrants and $30.0 million in connection with the refinancing of the 2019 Refinancing Term Loan with the Wintrust Loans. These proceeds were offset by the $39.0 million payment in full of the 2019 Refinancing Term Loan and associated $1.4 million prepayment penalty and other extinguishment costs, $2.0 million of scheduled principal payments on the Wintrust Term Loan, $1.3 million for payments on finance leases, $0.4 million in taxes related to net share settlement of equity awards and $0.6 million for payments related to debt issuance costs related to the Wintrust Term Loan and Wintrust Revolving Loan.

For the six months ended June 30, 2020, we borrowed and repaid $7.3 million on the 2019 Revolving Credit Facility and made capital lease payments of $1.3 million.

Debt and Other Obligations

The Company refinanced its 2019 Refinancing and ABL Credit Agreements on February 24, 2021, described below and therefore had no amounts outstanding under these agreements at June 30, 2021. Accordingly, the Company recognized a loss on the early debt extinguishment of $2.0 million. This loss consisted of $2.6 million of debt issuance and debt discount costs, reversed $2.0 million of the CB warrant liability due to the warrants being cancelled on the refinancing date and paid a prepayment penalty of $1.4 million.

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2019 Refinancing Agreement

On April 12, 2019 (the “Refinancing Closing Date”), Limbach Facility Services LLC (“LFS”) entered into a financing agreement (the “2019 Refinancing Agreement”) with the lenders thereto and Cortland Capital Market Services LLC, as collateral agent and administrative agent and CB Agent Services LLC, as origination agent (“CB”). The 2019 Refinancing Agreement consisted of (i) a $40.0 million term loan (the “2019 Refinancing Term Loan”) and (ii) a new $25.0 million multi-draw delayed draw term loan (the “2019 Delayed Draw Term Loan” and, collectively with the 2019 Refinancing Term Loan, the “2019 Term Loans”). Proceeds from the 2019 Refinancing Term Loan were used to repay the then existing Credit Agreement, to pay related fees and expenses thereof and to fund working capital of the 2019 Refinancing Borrowers (defined below). Management intended for proceeds of the 2019 Delayed Draw Term Loan to be used to fund permitted acquisitions under the 2019 Refinancing Agreement and related fees and expenses in connection therewith.

LFS and each of its subsidiaries were borrowers (the “2019 Refinancing Borrowers”) under the 2019 Refinancing Agreement. In addition, the 2019 Refinancing Agreement was guaranteed by the Company and LHLLC (each, a “2019 Refinancing Guarantor”, and together with the 2019 Refinancing Borrowers, the “Loan Parties”).

The 2019 Refinancing Agreement was secured by a first-priority lien on the real property of the Loan Parties and a second-priority lien on substantially all other assets of the Loan Parties, behind the 2019 ABL Credit Agreement (as defined below). The respective lien priorities of the 2019 Refinancing Agreement and the 2019 ABL Credit Agreement were governed by an intercreditor agreement.

2019 Refinancing Agreement - Interest Rates and Fees

The interest rate on borrowings under the 2019 Refinancing Agreement was, at the 2019 Refinancing Borrowers’ option, either LIBOR (with a 2.00% floor) plus 11.00% or a base rate (with a 3.00% minimum) plus 10.00%. At February 24, 2021 (the 2021 refinancing date) and June 30, 2020, the interest rate in effect on the 2019 Refinancing Term Loan was 13.00%.

2019 Refinancing Agreement - Other Terms and Conditions

The 2019 Refinancing Agreement was set to mature on April 12, 2022, subject to certain adjustment. Required amortization was $1.0 million per quarter and commenced with the fiscal quarter ending September 30, 2020. There was an unused line fee of 2.0% per annum on the undrawn portion of the 2019 Delayed Draw Term Loan, and there was a make-whole premium on prepayments made prior to the 19-month anniversary of the Refinancing Closing Date. This make-whole provision guaranteed that the Company would pay no less than 18 months’ applicable interest to the lenders under the 2019 Refinancing Agreement.

The 2019 Refinancing Agreement contained representations and warranties, and covenants which were customary for debt facilities of this type. Unless the Required Lenders (as defined in the 2019 Refinancing Agreement) otherwise consented in writing, the covenants limited the ability of the Company and its restricted subsidiaries to, among other things, (i) incur additional indebtedness or issue preferred stock, (ii) pay dividends or make distributions to the Company’s stockholders, (iii) purchase or redeem the Company’s equity interests, (iv) make investments, (v) create liens on their assets, (vi) enter into transactions with the Company’s affiliates, (vii) sell assets and (viii) merge or consolidate with, or dispose of substantially all of the Company’s assets to, other companies.

In addition, the 2019 Refinancing Agreement included customary events of default and other provisions that could require all amounts due thereunder to become immediately due and payable, either automatically or at the option of the lenders, if the Company failed to comply with the terms of the 2019 Refinancing Agreement or if other customary events occur.

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Furthermore, the 2019 Refinancing Agreement also contained two financial maintenance covenants for the 2019 Refinancing Term Loan, including a requirement to have sufficient collateral coverage of the aggregate outstanding principal amount of the 2019 Term Loans and as of the last day of each month for the total leverage ratio of the Company and its subsidiaries (the “Total Leverage Ratio”) not to exceed an amount beginning at 4.25 to 1.00 through June 30, 2019, and stepping down to 2.00 to 1.00 effective July 1, 2021. From July 1, 2019 through September 30, 2019, the Total Leverage Ratio may not exceed 4.00 to 1.00. In addition, the parties to the 2019 Refinancing Agreement entered into an amendment which, among other changes, revised the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 through the term of such agreement. The 2019 Refinancing Agreement contained a post-closing covenant requiring the remediation of the Company’s material weakness, as described in Item 9A of its 2018 Annual Report on Form 10-K, no later than December 31, 2020 and provision for updates as to the progress of such remediation, provided that, if such remediation was not completed on or prior to December 31, 2019, (x) the Company would be required to pay the post-closing fee pursuant to the terms of the Origination Agent Fee Letter (as defined in the 2019 Refinancing Agreement) and (y) the applicable margin shall be increased by 1.00% per annum for the period from January 1, 2020 until the date at which the material weakness was no longer disclosed or required to be disclosed in the Company’s SEC filings or audited financial statements of the Company or related auditor’s reports.

In connection with the 2019 Refinancing Amendment Number One and Waiver, dated November 14, 2019, the parties amended certain provisions of the 2019 Refinancing Agreement, including, among other changes to: (i) require, commencing October 1, 2019, a 3.00% increase in the interest rate on borrowings under the 2019 Refinancing Agreement; (ii) require the approval of CB and, generally, the lenders representing at least 50.1% of the aggregate undrawn term loan commitment or unpaid principal amount of the 2019 Term Loans, prior to effecting any permitted acquisition; (iii) revise the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 and thereafter through the term of the 2019 Refinancing Agreement; and (iv) require the liquidity of the loan parties, which is generally calculated by adding (a) unrestricted cash on hand of the Loan Parties maintained in deposit accounts subject to control agreements granting control to the collateral agent for the 2019 ABL Credit Agreement, to (b) the difference between (1) the lesser of (x) $15 million, as adjusted from time to time, and (y) 75% of certain customer accounts resulting from the sale of goods or services in the ordinary course of business minus certain reserves established by the administrative agent and (2) the sum of (x) the outstanding principal balance of all revolving loans under the 2019 ABL Credit Agreement plus (y) the aggregate undrawn available amount of all letters of credit then outstanding plus the amount of any obligations that arise from any draw against any letter of credit that have not been reimbursed by the borrowers or funded with a revolving loan under the 2019 ABL Credit Agreement (the “Loan Parties Liquidity”), as of the last day of any fiscal month ending on or after November 30, 2019, of at least $10,000,000. As a condition to executing the 2019 Refinancing Amendment Number One and Waiver, the loan parties were required to pay a non-refundable waiver fee of $400,000 and a non-refundable amendment fee of $1,000,000 (the “PIK First Amendment Fee”, which shall be paid in kind by adding the PIK First Amendment Fee to the outstanding principal amount of the 2019 Refinancing Term Loan as additional principal obligations thereunder on and as of the effective date 2019 Refinancing Amendment Number One and Waiver).

During December 2020, the Company was not in compliance with the collateral coverage debt covenant as defined by the 2019 Term Loan financing agreement. The Company was required to maintain at all times a Collateral Coverage Amount (as defined in the 2019 Refinancing Term Loan financing agreement) equal to or greater than the aggregate outstanding principal amount of the 2019 Term Loans. The Company calculated its Collateral Coverage amount at $37.9 million as of December 31, 2020, the aggregate outstanding principal amount of Term Loans was $39.0 million as of that same date for an excess of debt over collateral of $1.1 million. On February 1, 2021, the Company, LFS and LHLLC entered into a Waiver - Collateral Coverage Amount (December 2020) ("December 2020 Waiver") with the lenders party thereto and Cortland Capital Market Services LLC as collateral agent and administrative agent. The December 2020 Waiver included a waiver of the Company's compliance with the Collateral Coverage Amount for the month ending December 31, 2020. The lender waived the event of default arising from this noncompliance as of December 31, 2020, while reserving its rights with respect to covenant compliance in future months.

The 2019 Refinancing Term Loan was paid in full on February 24, 2021 as part of the refinancing transaction.

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2019 Refinancing Agreement - CB Warrants

In connection with the 2019 Refinancing Agreement, on the Refinancing Closing Date, the Company issued to CB and the other lenders under the 2019 Refinancing Agreement warrants (the “CB Warrants”) to purchase up to a maximum of 263,314 shares of the Company's common stock at an exercise price of $7.63 per share subject to certain adjustments, including for stock dividends, stock splits or reclassifications. The actual number of shares of common stock into which the CB Warrants were exercisable at any given time were equal to: (i) the product of (x) the number of shares equal to 2% of the Company’s issued and outstanding shares of common stock on the Refinancing Closing Date on a fully diluted basis and (y) the percentage of the total 2019 Delayed Draw Term Loan made as of the exercise date, minus (ii) the number of shares previously issued under the CB Warrants. As of the Refinancing Closing Date through February 24, 2021, no amounts had been drawn on the 2019 Delayed Draw Term Loan, so no portion of the CB Warrants were exercisable. The CB Warrants were to be exercised for cash or on a “cashless basis,” subject to certain adjustments, at any time after the 2019 Refinancing Closing Date until the expiration of such warrant at 5:00 p.m., New York time, on the earlier of (i) the five (5) year anniversary of the 2019 Refinancing Closing Date, or (ii) the liquidation of the Company. 

Accounting for the 2019 Term Loans and CB Warrants

The CB Warrants represented a freestanding financial instrument that was classified as a liability because the CB Warrants met the definition of a derivative instrument that does not meet the equity scope exception (i.e., the CB Warrants were not indexed to the entity’s own equity). In addition, the material weakness penalty described above was evaluated as an embedded derivative liability and bifurcated from the 2019 Term Loans as it represented a non-credit related embedded feature that provides for net settlement. Both the CB Warrants liability and the embedded derivative liability were required to be initially and subsequently measured at fair value. The initial fair values of the CB Warrants liability and the embedded derivative liability approximated $0.9 million and $0.4 million, respectively, on the Refinancing Closing Date. The Company estimated these fair values by using the Black-Scholes-Merton option pricing model and a probability-weighted discounted cash flow approach.

The CB Warrants liability was included in other long-term liabilities. The Company remeasured the fair value of the CB Warrants liability as of December 31, 2020 and February 24, 2021 prior to the refinancing date and recorded any adjustments as other income (expense). At both February 24, 2021 and December 31, 2020, the CB Warrants liability was $2.0 million. Due to the extinguishment of the CB Warrants on February 24, 2021, there was no liability associated with the CB Warrants recorded as of June 30, 2021. For the six months ended June 30, 2021, the Company recorded other income of $0.1 million to reflect the change in the fair value of the CB Warrants liability. The Company did not record a change in fair value of the warrant liability during the three months ended June 30, 2021 as the CB Warrants liability was extinguished as part of the debt refinancing on February 24, 2021. For the three and six months ended June 30, 2020, the Company recorded other income of $0.1 million and other expense of $0.1 million to reflect the change in the CB Warrants liability.

The proceeds for the 2019 Refinancing Term Loan were first allocated to the CB Warrants liability and embedded derivative liability based on their respective fair values with a corresponding amount of $1.3 million recorded as a debt discount to the 2019 Term Loans. In addition, the Company incurred approximately $3.9 million of debt issuance costs, including $1.4 million related to the first amendment, for the 2019 Term Loans that have also been recorded as a debt discount. The combined debt discount from the CB Warrants liability, embedded derivative liability and the debt issuance costs were being amortized into interest expense over the term of the 2019 Term Loans using the effective interest method and were expensed on the refinancing date as a loss on early debt extinguishment. The Company recorded interest expense for the amortization of the CB Warrants liability and embedded derivative debt discounts of $0.1 million for the six months ended June 30, 2021. The Company did not record interest expense for the amortization of the CB Warrants liability and embedded derivative liability debt discounts for the three months ended June 30, 2021 as these debt discounts were extinguished as part of the debt refinancing on February 24, 2021. The Company recorded interest expense for the amortization of the CB Warrants liability and embedded derivative debt discounts of $0.1 million and $0.2 million for the three and six months ended June 30, 2020, respectively.

In addition to the amortization of the debt discounts into interest expense, the Company recorded $0.1 million of interest expense for the amortization of debt issuance costs related to the 2019 Refinancing Term Loan for the six months ended June 30, 2021. The Company did not record any interest expense for the amortization of debt issuance costs for the three months ended June 30, 2021 as the debt issuance costs were extinguished as part of the debt refinancing on February 24, 2021. For the three and six months ended June 30, 2020, the Company recorded an additional $0.4 million and $0.7 million of interest expense, respectively, for the amortization of the debt issuance costs related to the 2019 Refinancing Term Loan.

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2019 ABL Credit Agreement

On the Refinancing Closing Date, LFS also entered into a financing agreement with the lenders thereto and Citizens Bank, N.A., as collateral agent, administrative agent and origination agent (the “2019 ABL Credit Agreement” and, together with the 2019 Refinancing Agreement, the “Refinancing Agreements”). The 2019 ABL Credit Agreement consisted of a $15.0 million revolving credit facility (the “2019 Revolving Credit Facility”). Proceeds of the 2019 Revolving Credit Facility were to be used for general corporate purposes. On the Refinancing Closing Date, the Company had nothing drawn on the ABL Credit Agreement and $14.0 million of available borrowing capacity thereunder (net of a $1.0 million reserve imposed by the lender).

The 2019 Refinancing Borrowers and 2019 Refinancing Guarantors under the 2019 ABL Credit Agreement were the same as under the 2019 Refinancing Agreement. The 2019 ABL Credit Agreement was secured by a second-priority lien on the real property of the Loan Parties (behind the 2019 Refinancing Agreement) and a first-priority lien on substantially all other assets of the Loan Parties.

2019 ABL Credit Agreement - Interest Rates and Fees

The interest rate on borrowings under the 2019 ABL Credit Agreement was, at the 2019 Refinancing Borrowers’ option, either LIBOR (with a 2.0% floor) plus an applicable margin ranging from 3.00% to 3.50% or a base rate (with a 3.0% minimum) plus an applicable margin ranging from 2.00% to 2.50%. At February 24, 2021 (the 2021 refinancing date) and June 30, 2020, the interest rate in effect on the 2019 ABL Credit Agreement was 5.25%.

2019 ABL Credit Agreement - Other Terms and Conditions

The 2019 ABL Credit Agreement was set to mature on April 12, 2022. There was also an unused line fee ranging from 0.250% to 0.375% per annum on undrawn amounts.

The 2019 ABL Credit Agreement contained representations and warranties, and covenants which are customary for debt facilities of this type. Unless the Required Lenders otherwise consented in writing, the covenants limited the ability of the Company and its restricted subsidiaries to, among other things, generally, to (i) incur additional indebtedness or issue preferred stock, (ii) pay dividends or make distributions to the Company’s stockholders, (iii) purchase or redeem the Company’s equity interests, (iv) make investments, (v) create liens on their assets, (vi) enter into transactions with the Company’s affiliates, (vii) sell assets other than in the ordinary course of business or another permitted disposition of assets and (viii) merge or consolidate with, or dispose of substantially all of the Company’s assets to, other companies.

The 2019 ABL Credit Agreement included customary events of default and other provisions that could require all amounts due thereunder to become immediately due and payable, either automatically or at the option of the lenders, if the Company failed to comply with the terms of the 2019 ABL Credit Agreement or if other customary events occur.

The 2019 ABL Credit Agreement also contained a financial maintenance covenant for the 2019 Revolving Credit Facility, which is a requirement for the Total Leverage Ratio of the Company and its subsidiaries not to exceed an amount beginning at 4.00 to 1.00 through September 30, 2019, and stepping down to 1.75 to 1.00 effective July 1, 2021. In addition, the parties to the 2019 ABL Credit Agreement entered into an amendment which, among other changes revises the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 through the term of such agreement.

In connection with the 2019 ABL Credit Amendment Number One and Waiver, the parties amended certain provisions of the 2019 ABL Credit Agreement, including, among other changes to (i) require the approval of the origination agent and, generally, the lenders representing at least 50.1% of the aggregate undrawn revolving loan commitment or unpaid principal amount of the 2019 Term Loans, prior to effecting any permitted acquisition; (ii) revise the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 through the term of the 2019 ABL Credit Agreement; and (iii) require the Loan Parties Liquidity as of the last day of any fiscal month ending on or after November 30, 2019, of at least $10,000,000, as described above in the Amendment Number One to 2019 Refinancing Agreement and Waiver. As a condition to executing the 2019 ABL Credit Amendment Number One and Waiver, the loan parties were required to pay a non-refundable waiver fee of $7,500.

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As noted above in the section titled: 2019 Refinancing Agreement - Other Terms and Conditions, the Company was subject to cross-default under our 2019 Revolving Credit Facility as a result of our failure to satisfy the Collateral Coverage Amount as defined in the 2019 Term Loan financing agreement, which required the company to obtain a waiver. Accordingly, on February 1, 2021, the Company, LFS and LHLLC entered into a Waiver - Collateral Coverage Amount (December 2020) (“December 2020 Waiver”) with the lenders party thereto and Citizens Bank, N.A., as collateral agent and administrative agent. The December 2020 Waiver included a waiver of the Company's compliance with the Collateral Coverage Amount for the month ending December 31, 2020. The lender has waived the event of default arising from this noncompliance as of December 31, 2020, while reserving its rights with respect to covenant compliance in future months.

At February 24, 2021 (the 2021 refinancing date) and December 31, 2020, the Company had irrevocable letters of credit in the amount of $3.4 million with its lender to secure obligations under its self-insurance program.

Accounting for the 2019 ABL Credit Agreement

The Company incurred approximately $0.9 million of debt issuance costs for the 2019 ABL Credit Agreement that had been recorded as a non-current deferred asset. The deferred asset was amortized into interest expense over the term of the 2019 Term ABL Credit Agreement using the effective interest method and then expensed on the February 24, 2021 refinancing date as a loss on early debt extinguishment. The Company recorded $0.1 million of interest expense for the amortization of debt issuance costs for the six months ended June 30, 2021. The Company did not record any interest expense for the amortization of debt issuance costs for the three months ended June 30, 2021 as the debt issuance costs were extinguished as part of the debt refinancing on February 24, 2021. For both the three and six months ended June 30, 2020, the Company recorded $0.1 million of interest expense for the amortization of debt issuance costs.

Wintrust Term and Revolving Loans

On February 24, 2021, LFS, LHLLC and the direct and indirect subsidiaries of LFS from time to time included as parties to the agreement (the “Wintrust Guarantors”) entered into a Credit Agreement (the “Credit Agreement”) by and among the LFS, LHLLC, Wintrust Guarantors, the lenders party thereto from time to time, Wheaton Bank & Trust Company, N.A., a subsidiary of Wintrust Financial Corporation (collectively, “Wintrust”), as administrative agent and L/C issuer, Bank of the West as documentation agent, M&T Bank as syndication agent, and Wintrust as lead arranger and sole book runner.

In accordance with the terms of the Credit Agreement, Lenders provide to LFS (i) a $30.0 million senior secured term loan (the “Wintrust Term Loan”); and (ii) a $25.0 million senior secured revolving credit facility with a $5.0 million sublimit for the issuance of letters of credit (the “Wintrust Revolving Loan” and, together with the Wintrust Term Loan, the “Wintrust Loans”). Proceeds of the Wintrust Loans were used to refinance certain existing indebtedness, finance working capital and other general corporate purposes and fund certain fees and expenses associated with the closing of the Wintrust Loans.

The Wintrust Revolving Loan bears interest, at the LFS’s option, at either LIBOR (with a 0.25% floor) plus 3.5% or a base rate (with a 3.0% floor) plus 0.50%, subject to a 50 basis point step-down based on the ratio between the senior debt of the Company and its subsidiaries to the EBITDA (earnings before interest, income taxes, depreciation and amortization) of the LFS and its subsidiaries for the most recently ended four fiscal quarters (the “Senior Leverage Ratio”). The Wintrust Term Loan bears interest, at LFS’s option, at either LIBOR (with a 0.25% floor) plus 4.0% or a base rate (with a 3.0% floor) plus 1.00%, subject to a 50 (for LIBOR) or 75 (for base rate) basis point step-down based on the Senior Leverage Ratio.

LFS is required to make principal payments on the Wintrust Term Loan in $0.5 million installments on the last business day of each month commencing on March 31, 2021 with a final payment of all principal and interest not sooner paid on the Wintrust Term Loan due and payable on February 24, 2026. The Wintrust Revolving Loan will mature and become due and payable by LFS on February 24, 2026.

The Wintrust Loans are secured by (i) a valid, perfected and enforceable lien of the administrative agent on the ownership interests held by each of LFS and Wintrust Guarantors in their respective subsidiaries; and (ii) a valid, perfected and enforceable lien of the administrative agent on each of LFS and Wintrust Guarantors’ personal property, fixtures and real estate, subject to certain exceptions and limitations. Additionally, the re-payment of the Wintrust Loans shall be jointly and severally guaranteed by each Wintrust Guarantor.

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The Credit Agreement contains representations and warranties, covenants and events of default that are customary for facilities of this type, as more particularly described in the Credit Agreement. The Wintrust Loans also contain three financial maintenance covenants, including (i) a requirement to have as of the last day of each quarter for the senior leverage ratio of the Company and its subsidiaries not to exceed an amount beginning at 2.25 to 1.00 through December 31, 2021, and stepping down to 2.00 to 1.00 at all times thereafter, (ii) a fixed charge coverage ratio of not less than 1.20 to 1.00 as of the last day of each fiscal quarter commencing with the fiscal quarter ending March 31, 2021, and (iii) no unfinanced capital expenditures, except for unfinanced capital expenditures in the ordinary course of business not exceeding in the aggregate $4.0 million during any fiscal year; and no default or event of default (as defined by the agreement) has occurred and is continuing, 50% of any portion of this annual limit, if not expended in the fiscal year for which it is permitted, may be carried over for expenditure in the next following fiscal year as stipulated by the agreement. LFS and its affiliates maintain various commercial and service relationships with certain members of the syndicate and their affiliates in the ordinary course of business. As of June 30, 2021, the Company was in compliance with all financial maintenance covenants as required by the Wintrust Loans.

The following is a summary of the additional margin and commitment fees payable on the available Wintrust Term Loan and Wintrust Revolving Loan credit commitment:

Level	Senior Leverage Ratio	Additional Margin for Prime Rate loans		Additional Margin for Prime Revolving loans		Additional Margin for Eurodollar Term loans		Additional Margin for Eurodollar Revolving loans		Commitment Fee
I	Greater than 1.00 to 1.00	1.00	%	0.50	%	4.00	%	3.50	%	0.25	%
II	Less than or equal to 1.00 to 1.00	0.25	%	—	%	3.50	%	3.00	%	0.25	%

At June 30, 2021, the interest rate in effect on the Wintrust Term Loan was 4.25% and the interest rate in effect on the Wintrust Revolving Loan was 3.75%.

At June 30, 2021, the Company had irrevocable letters of credit in the amount of $3.4 million with its lender to secure obligations under its self-insurance program.

The following table reflects our available funding capacity as of June 30, 2021:

(in thousands)
Cash & cash equivalents			$	27,693
Credit agreement:
Revolving credit facility	$	25,000
Outstanding revolving credit facility	—
Outstanding letters of credit	(3,405)
Net credit agreement capacity available			21,595
Total available funding capacity			$	49,288

Cash Flow Summary

Management continues to devote additional resources to its billing and collection efforts during the six months ended June 30, 2021. Management continues to expect that growth in its ODR business, which is less sensitive to the cash flow issues presented by large GCR projects, will positively impact our cash flow trends.

Provided that the Company’s lenders continue to provide working capital funding, we believe based on the Company's current reforecast that our current cash and cash equivalents of $27.7 million as of June 30, 2021, cash payments to be received from existing and new customers, and availability of borrowing under the revolving line of credit under our Wintrust Loans (pursuant to which we had $21.6 million of availability as of June 30, 2021) will be sufficient to meet our working capital and capital expenditure requirements for at least the next 12 months. See Note 1 - Organization and Plan of Business Operations.

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Surety Bonding

In connection with our business, we are occasionally required to provide various types of surety bonds that provide an additional measure of security to our customers for our performance under certain government and private sector contracts. Our ability to obtain surety bonds depends upon our capitalization, working capital, past performance, management expertise and external factors, including the capacity of the overall surety market. Surety companies consider such factors in light of the amount of our backlog that we have currently bonded and their current underwriting standards, which may change from time-to-time. The bonds we provide typically reflect the contract value. As of June 30, 2021 and December 31, 2020, the Company had approximately $265.3 million and $79.4 million in surety bonds outstanding, respectively. We believe that our $700.0 million bonding capacity provides us with a significant competitive advantage relative to many of our competitors which have limited bonding capacity.

Insurance and Self-Insurance

We purchase workers’ compensation and general liability insurance under policies with per-incident deductibles of $250,000 per occurrence. Losses incurred over primary policy limits are covered by umbrella and excess policies up to specified limits with multiple excess insurers. We accrue for the unfunded portion of costs for both reported claims and claims incurred but not reported. The liability for unfunded reported claims and future claims is reflected on the Condensed Consolidated Balance Sheets as current and non-current liabilities. The liability is computed by determining a reserve for each reported claim on a case-by-case basis based on the nature of the claim and historical loss experience for similar claims plus an allowance for the cost of incurred but not reported claims. The current portion of the liability is included in accrued expenses and other current liabilities on the Condensed Consolidated Balance Sheets. The non-current portion of the liability is included in other long-term liabilities on the Condensed Consolidated Balance Sheets.

We are self-insured related to medical and dental claims under policies with annual per-claimant and annual aggregate stop-loss limits. We accrue for the unfunded portion of costs for both reported claims and claims incurred but not reported. The liability for unfunded reported claims and future claims is reflected on the Condensed Consolidated Balance Sheets as a current liability in accrued expenses and other current liabilities.

The components of the self-insurance liability are reflected below as of June 30, 2021 and December 31, 2020:

(in thousands)	June 30, 2021		December 31, 2020
Current liability – workers’ compensation and general liability	$	105	$	197
Current liability – medical and dental	511		764
Non-current liability	776		890
Total liability	$	1,392	$	1,851
Restricted cash	$	113	$	113

The restricted cash balance represents cash set aside for the funding of workers’ compensation and general liability insurance claims. This amount is replenished when depleted, or at the beginning of each month.

Multiemployer Pension Plans

We participate in approximately 40 multiemployer pension plans (“MEPPs”) that provide retirement benefits to certain union employees in accordance with various collective bargaining agreements (“CBAs”). As one of many participating employers in these MEPPs, we are responsible with the other participating employers for any plan underfunding. Our contributions to a particular MEPP are established by the applicable CBAs; however, required contributions may increase based on the funded status of an MEPP and legal requirements of the Pension Protection Act of 2006 (the “PPA”), which requires substantially underfunded MEPPs to implement a funding improvement plan (“FIP”) or a rehabilitation plan (“RP”) to improve their funded status. Factors that could impact funded status of an MEPP include, without limitation, investment performance, changes in the participant demographics, decline in the number of contributing employers, changes in actuarial assumptions and the utilization of extended amortization provisions. Assets contributed to the MEPPs by us may be used to provide benefits to employees of other participating employers. If a participating employer stops contributing to an MEPP, the unfunded obligations of the MEPP may be borne by the remaining participating employers.

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An FIP or RP requires a particular MEPP to adopt measures to correct its underfunding status. These measures may include, but are not limited to an increase in a company’s contribution rate as a signatory to the applicable CBA, or changes to the benefits paid to retirees. In addition, the PPA requires that a 5.0% surcharge be levied on employer contributions for the first year commencing shortly after the date the employer receives notice that the MEPP is in critical status and a 10.0% surcharge on each succeeding year until a CBA is in place with terms and conditions consistent with the RP.

We could also be obligated to make payments to MEPPs if we either cease to have an obligation to contribute to the MEPP or significantly reduce our contributions to the MEPP because we reduce the number of employees who are covered by the relevant MEPP for various reasons, including, but not limited to, layoffs or closure of a subsidiary assuming the MEPP has unfunded vested benefits. The amount of such payments (known as a complete or partial withdrawal liability) would equal our proportionate share of the MEPPs’ unfunded vested benefits. We believe that certain of the MEPPs in which we participate may have unfunded vested benefits. Due to uncertainty regarding future factors that could trigger withdrawal liability, we are unable to determine (a) the amount and timing of any future withdrawal liability, if any, and (b) whether our participation in these MEPPs could have a material adverse impact on our financial condition, results of operations or liquidity.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are a smaller reporting company as defined in Rule 12b-2 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”); therefore, pursuant to Item 301(c) of Regulation S-K, we are not required to provide the information required by this Item.

Item 4. Controls and Procedures

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures, as defined in Rule 13a-15(e) under the Exchange Act. Based on that evaluation as of June 30, 2021, our Chief Executive Officer and Chief Financial Officer concluded that our Company’s disclosure controls and procedures were effective.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting identified in connection with the evaluation required by Rule 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the period covered by this Quarterly Report on Form 10-Q that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Inherent Limitations on Effectiveness of Controls

In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, cannot provide absolute assurance of achieving the desired control objectives. Our management recognizes that any control system, no matter how well designed and operated, is based upon certain judgments and assumptions and cannot provide absolute assurance that its objectives will be met. Similarly, an evaluation of controls cannot provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, have been detected.

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Part II

Item 1. Legal Proceedings

See Note 15 Commitments and Contingencies for further information regarding legal proceedings.

Item 1A. Risk Factors

There have been no material changes to our risk factors previously disclosed in Part I, Item 1A of our 2020 Annual Report on Form 10-K.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

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Item 6. Exhibits

Exhibit	Description
3.1	Second Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on July 26, 2016).
3.2	Certificate of Designation of Class A Preferred Stock (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on July 26, 2016).
3.3	Certificate of Correction to Certificate of Designation of Class A Preferred Stock (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on August 24, 2016).
3.4	Bylaws (incorporated by reference to Exhibit 3.3 to the Company’s Registration Statement on Form S-1 (file No. 333-195695), filed with the U.S. Securities and Exchange Commission on June 30, 2014).
10.1*	Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan.
31.1	Certification of the Chief Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of the Chief Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of the Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document.
101.SCH	XBRL Taxonomy Extension Schema Document.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document.
101.DEF	XBRL Taxonomy Extension Definition Document.

*Filed herewith.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	LIMBACH HOLDINGS, INC.
	/s/ Charles A. Bacon, III
	Charles A. Bacon, III
	Chief Executive Officer
	(Principal Executive Officer)
	/s/ Jayme L. Brooks
	Jayme L. Brooks
	Chief Financial Officer
	(Principal Financial and Accounting Officer)
Date: August 12, 2021

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EX-10.1

Exhibit 10.1

LIMBACH HOLDINGS, INC. AMENDED AND RESTATED OMNIBUS INCENTIVE PLAN

Section 1. General.

The name of the Plan is the Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan (the “Plan”). The Plan intends to: (a) encourage the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company’s objectives; (b) give Participants an incentive for excellence in individual performance; (c) promote teamwork among Participants; and (d) give the Company a significant advantage in attracting and retaining key Employees, Directors and Consultants. To accomplish such purposes, the Plan provides that the Company may grant Options, Stock Appreciation Rights, Restricted Shares, Restricted Stock Units, Performance-Based Awards (including performance-based Restricted Shares and Restricted Stock Units), Other Share Based Awards, Other Cash-Based Awards or any combination of the foregoing.

Section 2. Definitions.

For purposes of the Plan, the following terms shall be defined as set forth below:

(a) “Administrator” means the Board, or, if and to the extent the Board does not administer the Plan, the Committee in accordance with Section 3 of the Plan.

(b) “Affiliate” means a Person that directly, or indirectly through one or more intermediaries, controls, or is controlled by, or is under common control with, the Person specified. An entity shall be deemed an Affiliate of the Company for purposes of this definition only for such periods as the requisite ownership or control relationship is maintained.

(c) “Approval Date” means the date on which the Plan is approved by the Company’s stockholders.

(d) “Articles of Incorporation” means the articles of incorporation of the Company, as amended and/or restated from time to time.

(e) “Automatic Exercise Date” means, with respect to an Option or a Stock Appreciation Right, the last business day of the applicable term of the Option pursuant to Section 7(d) or the Stock Appreciation Right pursuant to Section 8(f).

(f) “Award” means any Option, Stock Appreciation Right, Restricted Share, Restricted Stock Unit, Performance-Based Award, Other Share Based Award or Other Cash-Based Award granted under the Plan.

(g) “Award Agreement” means any written agreement, contract or other instrument or document evidencing an Award. Evidence of an Award may be in written or electronic form, may be limited to notation on the books and records of the Company and, with the approval of the Board, need not be signed by a representative of the Company or a Participant. Any Shares that become deliverable to the Participant pursuant to the Plan may be issued in certificate form in the name of the Participant or in book-entry form in the name of the Participant.

(h) “Bylaws” means the bylaws of the Company, as may be amended and/or restated from time to time.

(i) “Beneficial Owner” (or any variant thereof) has the meaning defined in Rule 13d-3 under the Exchange Act.

(j) “Board” means the Board of Directors of the Company.

(k) “Cause” shall have the meaning assigned to such term in any Company or Affiliate employment or severance agreement or Award Agreement with the Participant or, if no such agreement exists or the agreement does not define “Cause,” Cause means (i) the refusal or neglect of the Participant to perform substantially his or her employment related duties, (ii) the Participant’s personal dishonesty, incompetence, willful misconduct or breach of fiduciary duty, (iii) the Participant’s indictment for, conviction of or entering a plea of guilty or nolo contendere to a

crime constituting a felony or his or her willful violation of any applicable law (other than a traffic violation or other offense or violation outside of the course of employment which in no way adversely affects the Company and its Subsidiaries or their reputation or the ability of the Participant to perform his or her employment related duties or to represent the Company or any Subsidiary of the Company that employs such Participant), (iv) the Participant’s failure to reasonably cooperate, following a request to do so by the Company, in any internal or governmental investigation of the Company or any of its Subsidiaries or (v) the Participant’s material breach of any written covenant or agreement with the Company or any of its Subsidiaries not to disclose any information pertaining to the Company or such Subsidiary or not to compete or interfere with the Company or such Subsidiary.

(l) “Change in Capitalization” means any (i) merger, consolidation, reclassification, recapitalization, spin-off, spin-out, repurchase or other reorganization or corporate transaction or event, (ii) extraordinary dividend (whether in the form of cash, Common Stock or other property), stock split or reverse stock split, (iii) combination or exchange of shares, (iv) other change in corporate structure or (v) payment of any other distribution, which, in any such case, the Administrator determines, in its sole discretion, affects the Shares such that an adjustment pursuant to Section 5 of the Plan is appropriate.

(m) “Change in Control” shall be deemed to have occurred if an event set forth in any one of the following paragraphs shall have occurred:

(i) any Person, other than (A) 1347 Investors LLC, EarlyBirdCapital, Inc., FdG HVAC LLC, Limbach Management Holding Company LLC, Marathon Special Opportunity Master Fund, Ltd. or Charles A. Bacon III or their respective Affiliates and successors, or (B) the Company or a trustee or other fiduciary holding securities under an employee benefit plan of the Company, is or becomes the Beneficial Owner, directly or indirectly, of securities of the Company representing fifty percent (50%) or more of the combined voting power of the Company’s then outstanding securities, excluding any Person who becomes such a Beneficial Owner in connection with a transaction described in clause (A) of paragraph (iii) below; or

(ii) the following individuals cease for any reason to constitute a majority of the number of Directors then serving on the Board: individuals who, during any period of two (2) consecutive years, constitute the Board and any new Director (other than a Director whose initial assumption of office is in connection with an actual or threatened election contest, including, but not limited to, a consent solicitation, relating to the election of Directors of the Company) whose appointment or election by the Board or nomination for election by the Company’s stockholders was approved or recommended by a vote of at least two-thirds (2∕3) of the Directors then still in office who either were Directors at the beginning of the two (2) year period or whose appointment, election or nomination for election was previously so approved or recommended; or

(iii) there is consummated a merger or consolidation of the Company or any Subsidiary thereof with any other corporation, other than a merger or consolidation (A) that results in the voting securities of the Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity) at least fifty percent (50%) of the combined voting power of the voting securities of the Company (or such surviving entity) outstanding immediately after such merger or consolidation, and (B) immediately following which the individuals who comprise the Board immediately prior thereto constitute at least a majority of the Board of the entity surviving such merger or consolidation or, if the Company or the entity surviving such merger is then a subsidiary, the ultimate parent thereof; or

(iv) the stockholders of the Company approve a plan of complete liquidation or dissolution of the Company or there is consummated an agreement for the sale or disposition by the Company of all or substantially all of the Company’s and all of the Company’s Subsidiaries’ assets (determined on a consolidated basis), other than (A) a sale or disposition by the Company of all or substantially all of the Company’s assets to an entity, at least fifty percent (50%) of the combined voting power of the voting securities of which are owned by stockholders of the Company following the completion of such transaction in substantially the same proportions as their ownership of the Company immediately prior to such sale or (B) a sale or disposition of all or substantially all of the Company’s assets immediately following which the individuals who comprise the Board immediately prior thereto constitute at

least a majority of the board of directors of the entity to which such assets are sold or disposed or, if such entity is a subsidiary, the ultimate parent thereof.

For each Award that constitutes deferred compensation under Code Section 409A, a transaction shall constitute a Change in Control only if it also constitutes a “change in control event” under the regulations under Code Section 409A.

Notwithstanding the foregoing, a “Change in Control” shall not be deemed to have occurred by virtue of the consummation of any transaction or series of integrated transactions immediately following which the holders of Common Stock immediately prior to such transaction or series of transactions continue to have substantially the same proportionate ownership in an entity which owns all or substantially all of the assets of the Company immediately following such transaction or series of.

(n) “Change in Control Price” shall have the meaning set forth in Section 12 of the Plan.

(o) “Code” means the Internal Revenue Code of 1986, as amended from time to time, or any successor thereto.

(p) “Committee” means any committee or subcommittee the Board may appoint to administer the Plan. Subject to the discretion of the Board, the Committee shall be composed entirely of individuals who meet the qualifications of a “non-employee director” within the meaning of Rule 16b-3 under the Exchange Act and any other qualifications required by the applicable stock exchange on which the Common Stock is traded. If at any time or to any extent the Board shall not administer the Plan, then the functions of the Administrator specified in the Plan shall be exercised by the Committee. Except as otherwise provided in the Company’s Articles of Incorporation or Bylaws, any action of the Committee with respect to the administration of the Plan shall be taken by a majority vote at a meeting at which a quorum is duly constituted or unanimous written consent of the Committee’s members.

(q) “Common Stock” means the common stock, par value $0.0001 per share, of the Company.

(r) “Company” means Limbach Holdings, Inc., a Delaware corporation (or any successor corporation, except as the term “Company” is used in the definition of  “Change in Control” above).

(s) “Consultant” means any current or prospective consultant or independent contractor of the Company or an Affiliate thereof, in each case, who is not an Employee, Executive Officer or non-employee Director.

(t) “Disability” shall have the meaning assigned to such term in any individual employment or severance agreement or Award Agreement with the Participant or, if no such agreement exists or the agreement does not define “Disability,” Disability means, with respect to any Participant, that such Participant (i) is unable to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or can be expected to last for a continuous period of not less than twelve (12) months, or (ii) is, by reason of any medically determinable physical or mental impairment which can be expected to result in death or can be expected to last for a continuous period of not less than twelve (12) months, receiving income replacement benefits for a period of not less than three (3) months under an accident and health plan covering Employees of the Company or an Affiliate thereof.

(u) “Director” means any individual who is a member of the Board on or after the Effective Date.

(v) “Effective Date” shall have the meaning set forth in Section 20 of the Plan.

(w) “Eligible Recipient” means: (i) an Employee; (ii) a non-employee Director; or (iii) a Consultant, in each case, who has been selected as an eligible recipient under the Plan by the Administrator; provided, that any Awards granted prior to the date an Eligible Recipient first performs services for the Company or an Affiliate thereof will not become vested or exercisable, and no Shares shall be issued or other payment made to such Eligible Recipient with respect to such Awards, prior to the date on which such Eligible Recipient first performs services for the Company or an Affiliate thereof. Notwithstanding the foregoing, to the extent required to avoid the imposition of

additional taxes under Code Section 409A, “Eligible Recipient” means: an (1) Employee; (2) a non-employee Director; or (3) a Consultant, in each case, of the Company or a Subsidiary thereof, who has been selected as an eligible recipient under the Plan by the Administrator.

(x) “Employee” shall mean any current or prospective employee of the Company or an Affiliate thereof, as described in Treasury Regulation Section 1.421-1(h), including an Executive Officer or Director who is also treated as an employee.

(y) “Exchange Act” means the Securities Exchange Act of 1934, as amended from time to time.

(z) “Executive Officer” means each Participant who is an executive officer (within the meaning of Rule 3b-7 under the Exchange Act) of the Company.

(aa) “Exercise Price” means, with respect to any Award under which the holder may purchase Shares, the price per share at which a holder of such Award granted hereunder may purchase Shares issuable upon exercise of such Award.

(bb) “Fair Market Value” as of a particular date shall mean: (i) if the Common Stock is admitted to trading on a national securities exchange, the fair market value of a Share on any date shall be the closing sale price reported for such share on such exchange on such date or, if no sale was reported on such date, on the last day preceding such date on which a sale was reported; (ii) if the Shares are not then listed on a national securities exchange, the average of the highest reported bid and lowest reported asked prices for the Shares as reported by the National Association of Securities Dealers, Inc. Automated Quotations System for the last preceding date on which there was a sale of such stock in such market; or (iii) whether or not the Shares are then listed on a national securities exchange or traded in an over-the-counter market or the value of such Shares is not otherwise determinable, such value as determined by the Committee in good faith and in a manner not inconsistent with the regulations under Code Section 409A.

(cc) “Free Standing Rights” shall have the meaning set forth in Section 8(a) of the Plan.

(dd) “Incentive Stock Option” means an Option that is intended to satisfy the requirements applicable to and to be treated as an “incentive stock option” described in Code Section 422.

(ee) “Nonqualified Stock Option” means an Option that is not intended to be an Incentive Stock Option.

(ff) “Option” means an option to purchase Shares granted pursuant to Section 7 of the Plan.

(gg) “Other Cash-Based Award” means a cash Award granted to a Participant under Section 11 of the Plan, including cash awarded as a bonus or upon the attainment of Performance Goals or otherwise as permitted under the Plan.

(hh) “Other Share Based Award” means a right or other interest granted to a Participant under the Plan that may be denominated or payable in, valued in whole or in part by reference to, or otherwise based on or related to, Common Stock, including, but not limited to, unrestricted Shares or dividend equivalents, each of which may be subject to the attainment of Performance Goals or a period of continued employment or other terms or conditions as permitted under the Plan.

(ii) “Participant” means any Eligible Recipient selected by the Administrator, pursuant to the Administrator’s authority provided for in Section 3 of the Plan, to receive grants of Options, Stock Appreciation Rights, Restricted Shares, Restricted Stock Units, Other Share Based Awards, Other Cash-Based Awards or any combination of the foregoing, and, upon his or her death, his or her successors, heirs, executors and administrators, as the case may be, solely with respect to any Awards outstanding at the date of the Eligible Recipient’s death.

(jj) “Performance-Based Award” means any Award granted under the Plan that is subject to one or more Performance Goals. Any dividends or dividend equivalents payable or credited to a Participant with respect to any

unvested Performance-Based Award shall be subject to the same Performance Goals as the Shares or units underlying the Performance-Based Award.

(kk) “Performance Goals” means performance goals based on one or more of the following criteria: (i) earnings before interest and taxes; (ii) earnings before interest, taxes, depreciation and amortization; (iii) net operating profit after tax; (iv) cash flow; (v) revenue; (vi) net revenues; (vii) sales; (viii) days sales outstanding; (ix) scrap rates; (x) income; (xi) net income; (xii) operating income; (xiii) net operating income; (xiv) operating margin; (xv) earnings; (xvi) earnings per share; (xvii) return on equity; (xviii) return on investment; (xix) return on capital; (xx) return on assets; (xxi) return on net assets; (xxii) total shareholder return; (xxiii) economic profit; (xxiv) market share; (xxv) appreciation in the fair market value, book value or other measure of value of the Company’s Common Stock; (xxvi) expense or cost control; (xxvii) working capital; (xxviii) volume or production; (xxix) new products; (xxx) customer satisfaction; (xxxi) brand development; (xxxii) employee retention or employee turnover; (xxxiii) employee satisfaction or engagement; (xxxiv) environmental, health or other safety goals; (xxxv) individual performance; (xxxvi) strategic objective milestones; (xxxvii) days inventory outstanding; (xxxviii) any other criteria specified by the Administrator in its sole discretion; and (xxxix) any combination of, or a specified increase in, any of the foregoing. Where applicable, the Performance Goals may be expressed in terms of attaining a specified level of the particular criteria or the attainment of a percentage increase or decrease in the particular criteria, and may be applied to one or more of the Company or an Affiliate thereof, or a division or strategic business unit of the Company, or may be applied to the performance of the Company relative to a market index, a group of other companies or a combination thereof, all as determined by the Committee. The Performance Goals may include a threshold level of performance below which no payment shall be made (or no vesting shall occur), levels of performance at which specified payments shall be made (or specified vesting shall occur), and a maximum level of performance above which no additional payment shall be made (or at which full vesting shall occur). At the time such an Award is granted, the Committee may specify any reasonable definition of the Performance Goals it uses. Such definitions may provide for equitable adjustments to the Performance Goals in recognition of unusual or non-recurring events affecting the Company or an Affiliate thereof or the financial statements of the Company or an Affiliate thereof, in response to changes in applicable laws or regulations, or to account for items of gain, loss or expense determined to be unusual in nature, infrequent in occurrence or unusual in nature and infrequent in occurrence or related to the disposal of a segment of a business or related to a change in accounting principles.

(ll) “Person” shall have the meaning given in Section 3(a)(9) of the Exchange Act, as modified and used in Sections 13(d) and 14(d) thereof, except that such term shall not include (i) the Company or any Subsidiary thereof, (ii) a trustee or other fiduciary holding securities under an employee benefit plan of the Company or any Subsidiary thereof, (iii) an underwriter temporarily holding securities pursuant to an offering of such securities, or (iv) a corporation owned, directly or indirectly, by the stockholders of the Company in substantially the same proportions as their ownership of stock of the Company.

(mm) “Related Rights” shall have the meaning set forth in Section 8(a) of the Plan.

(nn) “Restricted Shares” means an Award of Shares granted pursuant to Section 9 of the Plan subject to certain restrictions that lapse at the end of a specified period or periods.

(oo) “Restricted Stock Unit” means a notional account established pursuant to an Award granted to a Participant, as described in Section 10 of the Plan, that is (i) valued solely by reference to Shares, (ii) subject to restrictions specified in the Award Agreement, and (iii) payable in cash or in Shares (as specified in the Award Agreement). The Restricted Stock Units awarded to the Participant will vest according to the time-based criteria or Performance Goals criteria, and vested Restricted Stock Units will be settled at the time(s), specified in the Award Agreement.

(pp) “Restricted Period” means the period of time determined by the Administrator during which an Award or a portion thereof is subject to restrictions or, as applicable, the period of time within which performance is measured for purposes of determining whether an Award has been earned.

(qq) “Retirement” means a termination of a Participant’s employment, other than for Cause and other than by reason of death or Disability, on or after the attainment of age 65.

(rr) “Rule 16b-3” shall have the meaning set forth in Section 3(a) of the Plan.

(ss) “Shares” means shares of Common Stock reserved for issuance under the Plan, as adjusted pursuant to the Plan, and any successor (pursuant to a merger, consolidation or other reorganization) security.

(tt) “Stock Appreciation Right” means the right pursuant to an Award granted under Section 8 of the Plan to receive an amount equal to the excess, if any, of  (i) the aggregate Fair Market Value, as of the date such Award or portion thereof is surrendered, of the Shares covered by such Award or such portion thereof, over (ii) the aggregate Exercise Price of such Award or such portion thereof.

(uu) “Subsidiary” means, with respect to any Person, as of any date of determination, any other Person as to which such first Person owns or otherwise controls, directly or indirectly, more than fifty percent (50%) of the voting shares or other similar interests or a sole general partner interest or managing member or similar interest of such other Person. An entity shall be deemed a Subsidiary of the Company for purposes of this definition only for such periods as the requisite ownership or control relationship is maintained. Notwithstanding the foregoing, in the case of an Incentive Stock Option or any determination relating to an Incentive Stock Option, “Subsidiary” means a corporation that is a subsidiary of the Company within the meaning of Code Section 424(f).

(vv) “Substitute Award” shall mean an Award granted under the Plan upon the assumption of, or in substitution for, outstanding equity awards granted by a company or other entity in connection with a corporate transaction, such as a merger, combination, consolidation, or acquisition of property or stock; provided, however, that in no event shall the term “Substitute Award” be construed to refer to an award made in connection with the cancellation and repricing of an Option or Stock Appreciation Right.

Section 3. Administration.

(a) The Plan shall be administered by the Administrator in accordance with the requirements of Rule 16b-3 under the Exchange Act (“Rule 16b-3”), to the extent applicable.

(b) Pursuant to the terms of the Plan, the Administrator, subject, in the case of any Committee, to any restrictions on the authority delegated to it by the Board, shall have the power and authority, without limitation:

(i) to select those Eligible Recipients who shall be Participants;

(ii) to determine whether and to what extent Options, Stock Appreciation Rights, Restricted Shares, Restricted Stock Units, Other Share Based Awards, Other Cash-Based Awards or a combination of any of the foregoing, are to be granted hereunder to Participants;

(iii) to determine the number of Shares to be covered by each Award granted hereunder;

(iv) to determine the terms and conditions, not inconsistent with the terms of the Plan, of each Award granted hereunder, including, but not limited to, (A) the restrictions applicable to Restricted Shares and Restricted Stock Units and the conditions under which restrictions applicable to such Restricted Shares and Restricted Stock Units shall lapse, (B) the Performance Goals and periods applicable to Awards, if any, (C) the Exercise Price of each Award, (D) the vesting schedule applicable to each Award, (E) the number of Shares subject to each Award and (F) subject to the requirements of Code Section 409A (to the extent applicable), any amendments to the terms and conditions of outstanding Awards, including, but not limited to, extending the exercise period of such Awards and accelerating the vesting schedule of such Awards;

(v) to determine the terms and conditions, not inconsistent with the terms of the Plan, which shall govern all written instruments evidencing Options, Stock Appreciation Rights, Restricted Shares, Restricted Stock Units or Other Share Based Awards, Other Cash-Based Awards or any combination of the foregoing granted hereunder;

(vi) to determine the Fair Market Value;

(vii) to determine the duration and purpose of leaves of absence which may be granted to a Participant without constituting termination of the Participant’s employment for purposes of Awards granted under the Plan;

(viii) to adopt, alter and repeal such administrative rules, guidelines and practices governing the Plan as it shall from time to time deem advisable; and

(ix) to construe and interpret the terms and provisions of the Plan and any Award issued under the Plan (and any Award Agreement relating thereto), and to otherwise supervise the administration of the Plan and to exercise all powers and authorities either specifically granted under the Plan or necessary and advisable in the administration of the Plan.

(c) All decisions made by the Administrator pursuant to the provisions of the Plan shall be final, conclusive and binding on all persons, including the Company and the Participants. No member of the Board or the Committee, or any officer or employee of the Company or any Subsidiary thereof acting on behalf of the Board or the Committee, shall be personally liable for any action, omission, determination, or interpretation taken or made in good faith with respect to the Plan, and all members of the Board or the Committee and each and any officer or employee of the Company and of any Subsidiary thereof acting on their behalf shall, to the maximum extent permitted by law, be fully indemnified and protected by the Company in respect of any such action, omission, determination or interpretation.

Section 4. Shares Reserved for Issuance Under the Plan and Limitations on Awards.

(a) Subject to Section 5 of the Plan, the number of Shares that are reserved and available for issuance pursuant to Awards granted under the Plan is 2,250,000. The maximum number of Shares that may be issued pursuant to Options intended to be Incentive Stock Options is eight-hundred thousand (800,000).

(b) The aggregate Awards granted during any fiscal year to any Participant shall not exceed, subject to adjustment as provided in Section 5 of the Plan: (i) is four-hundred thousand (400,000) Shares subject to Options or Stock Appreciation Rights, (ii) is four-hundred thousand (400,000) Shares subject to Restricted Shares, Restricted Stock Units or Other Share Based Awards (other than Stock Appreciation Rights), and (iii) two million dollars ($2,000,000) with respect to Other Cash-Based Awards with a Restricted Period of one (1) year and five-hundred thousand dollars ($500,000) with respect to Other Cash-Based Awards with a Restricted Period greater than one (1) year. Notwithstanding the foregoing, the maximum number of Shares subject to Awards granted during any fiscal year to any non-employee Director, taken together with any cash fees paid to such non-employee Director during the fiscal year, shall not exceed five-hundred thousand dollars ($500,000) in total value (calculating the value of any such Awards based on the grant date Fair Market Value of such Awards for financial reporting purposes).

(c) Shares issued under the Plan may, in whole or in part, be authorized but unissued Shares or Shares that shall have been or may be reacquired by the Company in the open market, in private transactions or otherwise. Any Shares subject to an Award under the Plan that, after the Effective Date, are forfeited, canceled, settled or otherwise terminated without a distribution of Shares to a Participant will thereafter be deemed to be available for Awards. In applying the immediately preceding sentence, if  (i) Shares otherwise issuable or issued in respect of, or as part of, any Award are withheld to cover taxes or any applicable Exercise Price, such Shares shall be treated as having been issued under the Plan and shall not be available for issuance under the Plan, and (ii) any Share-settled Stock Appreciation Rights or Options are exercised, the aggregate number of Shares subject to such Stock Appreciation Rights or Options shall be deemed issued under the Plan and shall not be available for issuance under the Plan. In addition, Shares tendered to exercise outstanding Options or other Awards or to cover applicable taxes on any Awards shall not be available for issuance under the Plan.

(d) Except in the case of Substitute Awards granted pursuant to Section 4(e) and subject to the following sentence, Awards granted under the Plan shall be subject to a minimum vesting period of one (1) year. Notwithstanding the foregoing, (i) the Committee may provide that the vesting of an Award shall accelerate in the event of the Participant’s death, Disability, or Retirement, or the occurrence of a Change in Control, and (ii) the Committee may grant Awards covering five percent (5%) or fewer of the total number of Shares authorized under the Plan without respect to the above-described minimum vesting requirement. Notwithstanding the foregoing, with respect to Awards to non-employee Directors, the vesting of such Awards will be deemed to satisfy the one (1) year minimum vesting requirement to the extent that the Awards vest on the earlier of the one (1) year anniversary of the date of grant and the next annual meeting of the Company’s stockholders that is at least fifty (50) weeks after the immediately preceding year’s annual meeting.

(e) Substitute Awards shall not reduce the Shares authorized for grant under the Plan. In the event that a company acquired by the Company or any Affiliate or with which the Company or any Affiliate combines has shares available under a pre-existing plan approved by stockholders and not adopted in contemplation of such acquisition or combination, the shares available for grant pursuant to the terms of such pre-existing plan (as adjusted, to the extent appropriate, using the exchange ratio or other adjustment or valuation ratio or formula used in such acquisition or combination to determine the consideration payable to the holders of common stock of the entities party to such acquisition or combination) may be used for Awards under the Plan and shall not reduce the Shares authorized for grant under the Plan; provided, that Awards using such available Shares shall not be made after the date awards or grants could have been made under the terms of the pre-existing plan, absent the acquisition or combination, and shall only be made to individuals who were not employed by or providing services to the Company or its Affiliates immediately prior to such acquisition or combination.

(f) In the event that the Company or an Affiliate thereof consummates a transaction described in Code Section 424(a) (e.g., the acquisition of property or stock from an unrelated corporation), persons who become Employees or Directors in account of such transaction may be granted Substitute Awards in substitution for awards granted by their former employer, and any such substitute Options or Stock Appreciation Rights may be granted with an Exercise Price less than the Fair Market Value of a Share on the grant date thereof; provided, however, the grant of such substitute Option or Stock Appreciation Right shall not constitute a “modification” as defined in Code Section 424(h)(3) and the applicable Treasury regulations.

Section 5. Equitable Adjustments.

In the event of any Change in Capitalization, an equitable substitution or proportionate adjustment shall be made, in each case, as may be determined by the Administrator, in its sole discretion, in (i) the aggregate number of Shares reserved for issuance under the Plan and the maximum number of Shares that may be subject to Awards granted to any Participant in any calendar or fiscal year, (ii) the kind, number and Exercise Price subject to outstanding Options and Stock Appreciation Rights granted under the Plan; provided, however, that any such substitution or adjustment with respect to Options and Stock Appreciation Rights shall occur in accordance with the requirements of Code Section 409A, and (iii) the kind, number and purchase price of Shares subject to outstanding Restricted Shares or Other Share Based Awards granted under the Plan, in each case as may be determined by the Administrator, in its sole discretion; provided, however, that any fractional Shares resulting from the adjustment shall be eliminated. Such other equitable substitutions or adjustments shall be made as may be determined by the Administrator, in its sole discretion. Without limiting the generality of the foregoing, in connection with a Change in Capitalization, the Administrator may provide, in its sole discretion, for the cancellation of any outstanding Award granted hereunder in exchange for payment in cash or other property having an aggregate Fair Market Value of the Shares covered by such Award, reduced by the aggregate Exercise Price or purchase price thereof, if any. Notwithstanding anything contained in the Plan to the contrary, any adjustment with respect to an Incentive Stock Option due to an adjustment or substitution described in this Section 5 shall comply with the rules of Code Section 424(a), and in no event shall any adjustment be made which would render any Incentive Stock Option granted hereunder to be disqualified as an incentive stock option for purposes of Code Section 422. The Administrator’s determinations pursuant to this Section 5 shall be final, binding and conclusive.

Section 6. Eligibility.

The Participants under the Plan shall be selected from time to time by the Administrator, in its sole discretion, from among Eligible Recipients.

Section 7. Options.

(a) General. The Committee may, in its sole discretion, grant Options to Participants. Solely with respect to Participants who are Employees, the Committee may grant Incentive Stock Options, Nonqualified Stock Options or a combination of both. With respect to all other Participants, the Committee may grant only Nonqualified Stock Options. Each Participant who is granted an Option shall enter into an Award Agreement with the Company, containing such terms and conditions as the Administrator shall determine, in its sole discretion, which Award Agreement shall specify whether the Option is an Incentive Stock Option or a Nonqualified Stock Option and shall set forth, among other things, the Exercise Price of the Option, the term of the Option and provisions regarding exercisability of the Option granted thereunder. The provisions of each Option need not be the same with respect to each Participant. More than one Option may be granted to the same Participant and be outstanding concurrently hereunder. Options granted under the Plan shall be subject to the terms and conditions set forth in this Section 7 and shall contain such additional terms and conditions, not inconsistent with the terms of the Plan, as the Administrator shall deem desirable and set forth in the applicable Award Agreement. The prospective recipient of an Option shall not have any rights with respect to such Award, unless and until such recipient has received an Award Agreement and, if required by the Administrator in the Award Agreement, executed and delivered a fully executed copy thereof to the Company, within a period of sixty (60) days (or such other period as the Administrator may specify) after the award date.

(b) Limits on Incentive Stock Options. If the Administrator grants Incentive Stock Options, then to the extent that the aggregate fair market value of Shares with respect to which Incentive Stock Options are exercisable for the first time by any individual during any calendar year (under all plans of the Company) exceeds $100,000, such Options will be treated as Nonqualified Stock Options to the extent required by Code Section 422.

(c) Exercise Price. The Exercise Price of Shares purchasable under an Option shall be determined by the Administrator in its sole discretion at the time of grant; provided, however, that (i) in no event shall the Exercise Price of an Option be less than one hundred percent (100%) of the Fair Market Value of the Common Stock on the date of grant, and (ii) no Incentive Stock Option granted to a ten percent (10%) stockholder of the Company’s Common Stock (within the meaning of Code Section 422(b)(6)) shall have an exercise price per share less than one-hundred ten percent (110%) of the Fair Market Value of a Share on such date.

(d) Option Term. The maximum term of each Option shall be fixed by the Administrator, but in no event shall (i) an Option be exercisable more than ten (10) years after the date such Option is granted, and (ii) an Incentive Stock Option granted to a ten percent (10%) stockholder of the Company’s Common Stock (within the meaning of Code Section 422(b)(6)) be exercisable more than five (5) years after the date such Option is granted. Each Option’s term is subject to earlier expiration pursuant to the applicable provisions in the Plan and the Award Agreement. Notwithstanding the foregoing, the Administrator shall have the authority to accelerate the exercisability of any outstanding Option at such time and under such circumstances as the Administrator, in its sole discretion, deems appropriate. Notwithstanding any contrary provision in this Plan (including without limitation Section 7(h)), if, on the date an outstanding Option would expire, the exercise of the Option, including by a “net exercise” or “cashless” exercise, would violate applicable securities laws or any insider trading policy maintained by the Company from time to time, the expiration date applicable to the Option will be extended, except to the extent such extension would violate Section 409A, to a date that is thirty (30) calendar days after the date the exercise of the Option would no longer violate applicable securities laws or any such insider trading policy.

(e) Exercisability. Each Option shall be exercisable at such time or times and subject to such terms and conditions, including the attainment of pre-established Performance Goals, as shall be determined by the Administrator in the applicable Award Agreement. The Administrator may also provide that any Option shall be exercisable only in installments, and the Administrator may waive such installment exercise provisions at any time, in whole or in part, based on such factors as the Administrator may determine in its sole discretion. Notwithstanding anything to the contrary contained herein, an Option may not be exercised for a fraction of a share.

(f) Method of Exercise. Options may be exercised in whole or in part by giving written notice of exercise to the Company specifying the number of Shares to be purchased, accompanied by payment in full of the aggregate Exercise Price of the Shares so purchased in cash or its equivalent, as determined by the Administrator. As determined by the Administrator, in its sole discretion, with respect to any Option or category of Options, payment in whole or in part may also be made (i) by means of consideration received under any cashless exercise procedure approved by the Administrator (including the withholding of Shares otherwise issuable upon exercise), (ii) in the form of unrestricted Shares already owned by the Participant which have a Fair Market Value on the date of surrender equal to the aggregate Exercise Price of the Shares as to which such Option shall be exercised, (iii) any other form of consideration approved by the Administrator and permitted by applicable law or (iv) any combination of the foregoing. In determining which methods a Participant may utilize to pay the Exercise Price, the Administrator may consider such factors as it determines are appropriate; provided, however, that with respect to Incentive Stock Options, all such discretionary determinations shall be made by the Administrator at the time of grant and specified in the Award Agreement.

(g) Rights as Stockholder. A Participant shall have no rights to dividends or any other rights of a stockholder with respect to the Shares subject to an Option until the Participant has given written notice of the exercise thereof, has paid in full for such Shares and has satisfied the requirements of Section 15 of the Plan.

(h) Termination of Employment or Service.

(i) Unless the applicable Award Agreement provides otherwise, in the event that the employment or service of a Participant with the Company and all Affiliates thereof shall terminate for any reason other than Cause, Retirement, Disability, or death, (A) Options granted to such Participant, to the extent that they are exercisable at the time of such termination, shall remain exercisable until the date that is ninety (90) days after such termination, on which date they shall expire, and (B) Options granted to such Participant, to the extent that they were not exercisable at the time of such termination, shall expire at the close of business on the date of such termination. The ninety (90) day period described in this Section 7(h)(i) shall be extended to one (1) year after the date of such termination in the event of the Participant’s death during such ninety (90) day period. Notwithstanding the foregoing, no Option shall be exercisable after the expiration of its term.

(ii) Unless the applicable Award Agreement provides otherwise, in the event that the employment or service of a Participant with the Company and all Affiliates thereof shall terminate on account of Retirement, Disability or the death of the Participant, (A) Options granted to such Participant, to the extent that they were exercisable at the time of such termination, shall remain exercisable until the date that is one (1) year after such termination, on which date they shall expire and (B) Options granted to such Participant, to the extent that they were not exercisable at the time of such termination, shall expire at the close of business on the date of such termination. Notwithstanding the foregoing, no Option shall be exercisable after the expiration of its term.

(iii) In the event of the termination of a Participant’s employment or service for Cause, all outstanding Options granted to such Participant shall expire at the commencement of business on the date of such termination.

(iv) For purposes of determining which Options are exercisable upon termination of employment or service for purposes of this Section 7(h), Options that are not exercisable solely due to a blackout period shall be considered exercisable.

(i) Other Change in Employment Status. An Option may be affected, both with regard to vesting schedule and termination, by leaves of absence, changes from full-time to part-time employment, partial disability or other changes in the employment status or service of a Participant, as evidenced in a Participant’s Award Agreement.

(j) Change in Control. Notwithstanding anything herein to the contrary, upon a Change in Control, all outstanding Options shall be subject to Section 12 of the Plan.

(k) Automatic Exercise. Unless otherwise provided by the Administrator in an Award Agreement or otherwise, or as otherwise directed by the Participant in writing to the Company, each vested and exercisable Option

outstanding on the Automatic Exercise Date with an Exercise Price per Share that is less than the Fair Market Value per Share as of such date shall automatically and without further action by the Participant or the Company be exercised on the Automatic Exercise Date. In the sole discretion of the Administrator, payment of the exercise price of any such Option shall be made pursuant to Section 7(f)(i), or (ii) and the Company or any Affiliate shall deduct or withhold an amount sufficient to satisfy all taxes associated with such exercise in accordance with Section 15. Unless otherwise determined by the Administrator, this Section 7(k) shall not apply to an Option if the Participant’s employment or service has terminated on or before the Automatic Exercise Date. For the avoidance of doubt, no Option with an Exercise Price per Share that is equal to or greater the Fair Market Value per Share on the Automatic Exercise Date shall be exercised pursuant to this Section 7(k).

Section 8. Stock Appreciation Rights.

(a) General. Stock Appreciation Rights may be granted either alone (“Free Standing Rights”) or in conjunction with all or part of any Option granted under the Plan (“Related Rights”). Related Rights may be granted either at or after the time of the grant of such Option. The Administrator shall determine the Eligible Recipients to whom, and the time or times at which, grants of Stock Appreciation Rights shall be made, the number of Shares to be awarded, the price per Share, and all other conditions of Stock Appreciation Rights. Notwithstanding the foregoing, no Related Right may be granted for more Shares than are subject to the Option to which it relates and any Stock Appreciation Right must be granted with an Exercise Price not less than the Fair Market Value of Common Stock on the date of grant. The provisions of Stock Appreciation Rights need not be the same with respect to each Participant. Stock Appreciation Rights granted under the Plan shall be subject to the following terms and conditions set forth in this Section 8 and shall contain such additional terms and conditions, not inconsistent with the terms of the Plan, as the Administrator shall deem desirable, as set forth in the applicable Award Agreement.

(b) Awards; Rights as Stockholder. The prospective recipient of a Stock Appreciation Right shall not have any rights with respect to such Award, unless and until such recipient has received an Award Agreement and, if required by the Administrator in the Award Agreement, executed and delivered a fully executed copy thereof to the Company, within a period of sixty (60) days (or such other period as the Administrator may specify) after the award date. Participants who are granted Stock Appreciation Rights shall have no rights as stockholders of the Company with respect to the grant or exercise of such rights.

(c) Exercisability.

(i) Stock Appreciation Rights that are Free Standing Rights shall be exercisable at such time or times and subject to such terms and conditions as shall be determined by the Administrator in the applicable Award Agreement.

(ii) Stock Appreciation Rights that are Related Rights shall be exercisable only at such time or times and to the extent that the Options to which they relate shall be exercisable in accordance with the provisions of Section 7 above and this Section 8 of the Plan.

(d) Payment Upon Exercise.

(i) Upon the exercise of a Free Standing Right, the Participant shall be entitled to receive up to, but not more than, that number of Shares, determined using the Fair Market Value, equal in value to the excess of the Fair Market Value as of the date of exercise over the price per share specified in the Free Standing Right multiplied by the number of Shares in respect of which the Free Standing Right is being exercised.

(ii) A Related Right may be exercised by a Participant by surrendering the applicable portion of the related Option. Upon such exercise and surrender, the Participant shall be entitled to receive up to, but not more than, that number of Shares, determined using the Fair Market Value, equal in value to the excess of the Fair Market Value as of the date of exercise over the Exercise Price specified in the related Option multiplied by the number of Shares in respect of which the Related Right is being exercised. Options which have been so surrendered, in whole or in part, shall no longer be exercisable to the extent the Related Rights have been so exercised.

(iii) Notwithstanding the foregoing, the Administrator may determine to settle the exercise of a Stock Appreciation Right in cash (or in any combination of Shares and cash).

(e) Termination of Employment or Service.

(i) Subject to Section 8(f), in the event of the termination of employment or service with the Company and all Affiliates thereof of a Participant who has been granted one or more Free Standing Rights, such rights shall be exercisable at such time or times and subject to such terms and conditions as shall be determined by the Administrator in the applicable Award Agreement.

(ii) Subject to Section 8(f), in the event of the termination of employment or service with the Company and all Affiliates thereof of a Participant who has been granted one or more Related Rights, such rights shall be exercisable at such time or times and subject to such terms and conditions as set forth in the related Options.

(f) Term.

(i) The term of each Free Standing Right shall be fixed by the Administrator, but no Free Standing Right shall be exercisable more than ten (10) years after the date such right is granted.

(ii) The term of each Related Right shall be the term of the Option to which it relates, but no Related Right shall be exercisable more than ten (10) years after the date such right is granted.

(g) Change in Control. Notwithstanding anything herein to the contrary, upon a Change in Control, all outstanding Stock Appreciation Rights shall be subject to Section 12 of the Plan.

(h) Automatic Exercise. Unless otherwise provided by the Administrator in an Award Agreement or otherwise, or as otherwise directed by the Participant in writing to the Company, each vested and exercisable Stock Appreciation Right outstanding on the Automatic Exercise Date with an Exercise Price per Share that is less than the Fair Market Value per Share as of such date shall automatically and without further action by the Participant or the Company be exercised on the Automatic Exercise Date. The Company or any Affiliate shall deduct or withhold an amount sufficient to satisfy all taxes associated with such exercise in accordance with Section 15. Unless otherwise determined by the Administrator, this Section 8(h) shall not apply to a Stock Appreciation Right if the Participant’s employment or service has terminated on or before the Automatic Exercise Date. For the avoidance of doubt, no Stock Appreciation Right with an Exercise Price per Share that is equal to or greater the Fair Market Value per Share on the Automatic Exercise Date shall be exercised pursuant to this Section 8(h).

Section 9. Restricted Shares.

(a) General. Restricted Shares may be issued either alone or in addition to other Awards granted under the Plan. The Administrator shall determine the Eligible Recipients to whom, and the time or times at which, grants of Restricted Shares shall be made; the number of Shares to be awarded; the price, if any, to be paid by the Participant for the acquisition of Restricted Shares; the Restricted Period, if any, applicable to Restricted Shares; the Performance Goals (if any) applicable to Restricted Shares; and all other conditions of the Restricted Shares. If the restrictions, Performance Goals and/or conditions established by the Administrator are not attained, a Participant shall forfeit his or her Restricted Shares in accordance with the terms of the grant. The provisions of the Restricted Shares need not be the same with respect to each Participant.

(b) Awards and Certificates. The prospective recipient of Restricted Shares shall not have any rights with respect to any such Award, unless and until such recipient has received an Award Agreement and, if required by the Administrator in the Award Agreement, executed and delivered a fully executed copy thereof to the Company, within a period of sixty (60) days (or such other period as the Administrator may specify) after the award date. Except as otherwise provided in Section 9(c) of the Plan, (i) each Participant who is granted an award of Restricted Shares may, in the Company’s sole discretion, be issued a stock certificate in respect of such Restricted Shares; and

(ii) any such certificate so issued shall be registered in the name of the Participant, and shall bear an appropriate legend referring to the terms, conditions, and restrictions applicable to any such Award.

The Company may require that the stock certificates, if any, evidencing Restricted Shares granted hereunder be held in the custody of the Company until the restrictions thereon shall have lapsed, and that, as a condition of any award of Restricted Shares, the Participant shall have delivered a stock power, endorsed in blank, relating to the Shares covered by such Award.

Notwithstanding anything in the Plan to the contrary, any Restricted Shares (whether before or after any vesting conditions have been satisfied) may, in the Company’s sole discretion, be issued in uncertificated form pursuant to the customary arrangements for issuing shares in such form.

(c) Restrictions and Conditions. The Restricted Shares granted pursuant to this Section 9 shall be subject to the following restrictions and conditions and any additional restrictions or conditions as determined by the Administrator at the time of grant or thereafter:

(i) The Administrator may, in its sole discretion, provide for the lapse of restrictions in installments and may accelerate or waive such restrictions in whole or in part based on such factors and such circumstances as the Administrator may determine, in its sole discretion, including, but not limited to, the attainment of certain Performance Goals, the Participant’s termination of employment or service as a non-employee Director or Consultant of the Company or an Affiliate thereof, or the Participant’s death or Disability.

(ii) Except as provided in Section 17 of the Plan or in the Award Agreement, the Participant shall generally have the rights of a stockholder of the Company with respect to Restricted Shares during the Restricted Period. In the Administrator’s discretion and as provided in the applicable Award Agreement, a Participant may be entitled to dividends or dividend equivalents on an Award of Restricted Shares, which will be payable in accordance with the terms of such grant as determined by the Administrator. Certificates for Shares of unrestricted Common Stock may, in the Company’s sole discretion, be delivered to the Participant only after the Restricted Period has expired without forfeiture in respect of such Restricted Shares, except as the Administrator, in its sole discretion, shall otherwise determine.

(iii) The rights of Participants granted Restricted Shares upon termination of employment or service as a non-employee Director or Consultant of the Company or an Affiliate thereof terminates for any reason during the Restricted Period shall be set forth in the Award Agreement.

(d) Change in Control. Notwithstanding anything herein to the contrary, upon a Change in Control, all outstanding Restricted Shares shall be subject to Section 12 of the Plan.

Section 10. Restricted Stock Units.

(a) General. Restricted Stock Units may be issued either alone or in addition to other Awards granted under the Plan. The Administrator shall determine the Eligible Recipients to whom, and the time or times at which, grants of Restricted Stock Units shall be made; the number of Restricted Stock Units to be awarded; the Restricted Period, if any, applicable to Restricted Stock Units; the Performance Goals (if any) applicable to Restricted Stock Units; and all other conditions of the Restricted Stock Units. If the restrictions, Performance Goals and/or conditions established by the Administrator are not attained, a Participant shall forfeit his or her Restricted Stock Units in accordance with the terms of the grant. The provisions of Restricted Stock Units need not be the same with respect to each Participant.

(b) Award Agreement. The prospective recipient of Restricted Stock Units shall not have any rights with respect to any such Award, unless and until such recipient has received an Award Agreement and, if required by the Administrator in the Award Agreement, executed and delivered a fully executed copy thereof to the Company, within a period of sixty (60) days (or such other period as the Administrator may specify) after the award date.

(c) Restrictions and Conditions. The Restricted Stock Units granted pursuant to this Section 10 shall be subject to the following restrictions and conditions and any additional restrictions or conditions as determined by the Administrator at the time of grant or, subject to Code Section 409A, thereafter:

(i) The Administrator may, in its sole discretion, provide for the lapse of restrictions in installments and may accelerate or waive such restrictions in whole or in part based on such factors and such circumstances as the Administrator may determine, in its sole discretion, including, but not limited to, the attainment of certain Performance Goals, the Participant’s termination of employment or service as a non-employee Director or Consultant of the Company or an Affiliate thereof, or the Participant’s death or Disability.

(ii) Participants holding Restricted Stock Units shall have no voting rights. A Restricted Stock Unit may, at the Administrator’s discretion, carry with it a right to dividend equivalents. Such right would entitle the holder to be credited with an amount equal to all cash dividends paid on one Share while the Restricted Stock Unit is outstanding. The Administrator, in its discretion, may grant dividend equivalents from the date of grant or only after a Restricted Stock Unit is vested.

(iii) The rights of Participants granted Restricted Stock Units upon termination of employment or service as a non-employee Director or Consultant of the Company or an Affiliate thereof terminates for any reason during the Restricted Period shall be set forth in the Award Agreement.

(d) Settlement of Restricted Stock Units. Settlement of vested Restricted Stock Units shall be made to Participants in the form of Shares, unless the Administrator, in its sole discretion, provides for the payment of the Restricted Stock Units in cash (or partly in cash and partly in Shares) equal to the value of the Shares that would otherwise be distributed to the Participant.

(e) Change in Control. Notwithstanding anything herein to the contrary, upon a Change in Control, all outstanding Restricted Stock Units shall be subject to Section 12 of the Plan.

Section 11. Other Share Based or Cash-Based Awards.

(a) The Administrator is authorized to grant Awards to Participants in the form of Other Share Based Awards or Other Cash-Based Awards, as deemed by the Administrator to be consistent with the purposes of the Plan and as evidenced by an Award Agreement. The Administrator shall determine the terms and conditions of such Awards, consistent with the terms of the Plan, at the date of grant or thereafter, including any Performance Goals and performance periods. Common Stock or other securities or property delivered pursuant to an Award in the nature of a purchase right granted under this Section 11 shall be purchased for such consideration, paid for at such times, by such methods, and in such forms, including, without limitation, Shares, other Awards, notes or other property, as the Administrator shall determine, subject to any required corporate action.

(b) The prospective recipient of an Other Share-Based Award or Other Cash-Based Award shall not have any rights with respect to such Award, unless and until such recipient has received an Award Agreement and, if required by the Administrator in the Award Agreement, executed and delivered a fully executed copy thereof to the Company, within a period of sixty (60) days (or such other period as the Administrator may specify) after the award date.

(c) Notwithstanding anything herein to the contrary, upon a Change in Control, all outstanding Other Share-Based Awards and Other Cash-Based Awards shall be subject to Section 12 of the Plan.

Section 12. Change in Control.

The Administrator may provide in the applicable Award Agreement that an Award will vest on an accelerated basis upon the Participant’s termination of employment or service in connection with a Change in Control or upon the occurrence of any other event that the Administrator may set forth in the Award Agreement. If the Company is a party to an agreement that is reasonably likely to result in a Change in Control, such agreement may provide for: (i)

the continuation of any Options and Stock Appreciation Rights by the Company, if the Company is the surviving corporation; (ii) the assumption of any Options and Stock Appreciation Rights by the surviving corporation or its parent or subsidiary; (iii) the substitution by the surviving corporation or its parent or subsidiary of equivalent awards for any Options and Stock Appreciation Rights, provided, however, that any such assumption or substitution with respect to Options and Stock Appreciation Rights under the foregoing clauses (ii) or (iii) shall occur in accordance with the requirements of Code Section 409A and 424, when applicable; or (iv) settlement of any Options and Stock Appreciation Rights for the Change in Control Price (less, to the extent applicable, the per share exercise or grant price), or, if the per share exercise or grant price equals or exceeds the Change in Control Price or if the Administrator determines that Award cannot reasonably become vested pursuant to its terms, such Options and Stock Appreciation Rights shall terminate and be canceled. To the extent that Restricted Shares, Restricted Stock Units or other Awards (other than Options and Stock Appreciation Rights) settle in Shares in accordance with their terms upon a Change in Control, such Shares shall be entitled to receive as a result of the Change in Control transaction the same consideration as the Shares held by stockholders of the Company as a result of the Change in Control transaction. For purposes of this Section 12, “Change in Control Price” shall mean the Fair Market Value of a Share upon a Change in Control. To the extent that the consideration paid in any such Change in Control transaction consists all or in part of securities or other non-cash consideration, the value of such securities or other non-cash consideration shall be determined in good faith by the Administrator.

Section 13. Amendment and Termination.

(a) The Board or the Committee may amend, alter or terminate the Plan, but no amendment, alteration, or termination shall be made that would impair the rights of a Participant under any Award theretofore granted without such Participant’s consent.

(b) Notwithstanding the foregoing, (i) approval of the Company’s stockholders shall be obtained to increase the aggregate Share limit and annual Award limits described in Section 4 and for any amendment that would require such approval in order to satisfy the requirements of Code Section 422, if applicable, any rules of the stock exchange on which the Common Stock is traded or other applicable law, and (ii) without stockholder approval to the extent required by the rules of any applicable national securities exchange or inter-dealer quotation system on which the Shares are listed or quoted, except as otherwise permitted under Section 5 of the Plan, (A) no amendment or modification may reduce the Exercise Price of any Option or Stock Appreciation Right, (B) the Committee may not cancel any outstanding Option or Stock Appreciation Right and replace it with a new Option or Stock Appreciation Right, another Award or cash and (C) the Committee may not take any other action that is considered a “repricing” for purposes of the stockholder approval rules of the applicable securities exchange or inter-dealer quotation system.

(c) Subject to the terms and conditions of the Plan and Code Section 409A, the Administrator may modify, extend or renew outstanding Awards under the Plan, or accept the surrender of outstanding Awards (to the extent not already exercised) and grant new Awards in substitution of them (to the extent not already exercised).

(d) Notwithstanding the foregoing, no alteration, modification or termination of an Award will, without the prior written consent of the Participant, adversely alter or impair any rights or obligations under any Award already granted under the Plan.

Section 14. Unfunded Status of Plan.

The Plan is intended to constitute an “unfunded” plan for incentive compensation. With respect to any payments not yet made or Shares not yet transferred to a Participant by the Company, nothing contained herein shall give any such Participant any rights that are greater than those of a general creditor of the Company.

Section 15. Withholding Taxes.

Each Participant shall, no later than the date as of which the value of an Award first becomes includible in the gross income of such Participant for federal, state and/or local income tax purposes, pay to the Company, or make arrangements satisfactory to the Administrator regarding payment of, any federal, state, or local taxes of any kind,

domestic or foreign, required by law or regulation to be withheld with respect to the Award. The obligations of the Company under the Plan shall be conditional on the making of such payments or arrangements, and the Company shall, to the extent permitted by law, have the right to deduct any such taxes from any payment of any kind otherwise due to such Participant. Whenever cash is to be paid pursuant to an Award granted hereunder, the Company shall have the right to deduct therefrom an amount sufficient to satisfy any federal, state and local withholding tax requirements related thereto. Whenever Shares are to be delivered pursuant to an Award, the Company shall have the right to require the Participant to remit to the Company in cash an amount sufficient to satisfy any related federal, state and local taxes, domestic or foreign, to be withheld and applied to the tax obligations. With the approval of the Administrator, a Participant may satisfy the foregoing requirement by electing to have the Company withhold from delivery of Shares or by delivering already owned unrestricted shares of Common Stock, in each case, having a value equal to the amount required to be withheld or other greater amount not exceeding the maximum statutory rate required to be collected on the transaction under applicable law, as applicable to the Participant, if such other greater amount would not, as determined by the Committee, result in adverse financial accounting treatment (including in connection with the effectiveness of FASB Accounting Standards Update 2016-09). Such Shares shall be valued at their Fair Market Value on the date of which the amount of tax to be withheld is determined. Fractional share amounts shall be settled in cash. Such an election may be made with respect to all or any portion of the Shares to be delivered pursuant to an Award. The Company may also use any other method of obtaining the necessary payment or proceeds, as permitted by law, to satisfy its withholding obligation with respect to any Option or other Award.

Section 16. Dividends; Dividend Equivalents.

Notwithstanding anything in this Plan to the contrary, to the extent that an Award contains a right to receive dividends or dividend equivalents while such Award remains unvested, such dividends or dividend equivalents will be accumulated and paid once and to the extent that the underlying Award vests.

Section 17. Non-United States Employees.

Without amending the Plan, the Administrator may grant Awards to eligible persons residing in non-United States jurisdictions on such terms and conditions different from those specified in the Plan, including the terms of any award agreement or plan, adopted by the Company or any Subsidiary thereof to comply with, or take advantage of favorable tax or other treatment available under, the laws of any non-United States jurisdiction, as may in the judgment of the Administrator be necessary or desirable to foster and promote achievement of the purposes of the Plan and, in furtherance of such purposes the Administrator may make such modifications, amendments, procedures, subplans and the like as may be necessary or advisable to comply with provisions of laws in other countries or jurisdictions in which the Company or its Subsidiaries operates or has employees.

Section 18. Transfer of Awards.

No purported sale, assignment, mortgage, hypothecation, transfer, charge, pledge, encumbrance, gift, transfer in trust (voting or other) or other disposition of, or creation of a security interest in or lien on, any Award or any agreement or commitment to do any of the foregoing (each, a “Transfer”) by any holder thereof in violation of the provisions of the Plan or an Award Agreement will be valid, except with the prior written consent of the Administrator, which consent may be granted or withheld in the sole discretion of the Administrator. Any purported Transfer of an Award or any economic benefit or interest therein in violation of the Plan or an Award Agreement shall be null and void ab initio, and shall not create any obligation or liability of the Company, and any person purportedly acquiring any Award or any economic benefit or interest therein transferred in violation of the Plan or an Award Agreement shall not be entitled to be recognized as a holder of such Shares. Unless otherwise determined by the Administrator in accordance with the provisions of the immediately preceding sentence, an Option may be exercised, during the lifetime of the Participant, only by the Participant or, during any period during which the Participant is under a legal disability, by the Participant’s guardian or legal representative.

Section 19. Continued Employment.

The adoption of the Plan shall not confer upon any Eligible Recipient any right to continued employment or service with the Company or an Affiliate thereof, as the case may be, nor shall it interfere in any way with the right of the Company or an Affiliate thereof to terminate the employment or service of any of its Eligible Recipients at any time.

Section 20. Effective Date and Approval Date.

The Plan was originally effective as of July 20, 2016 and amended on May 30, 2019 and the Plan, as amended and restated hereby, will be effective as of June 16, 2021 (the “Effective Date”). The Plan will be unlimited in duration and, in the event of Plan termination, will remain in effect as long as any Shares awarded under it are outstanding and not fully vested; provided, however, that no Awards will be made under the Plan on or after June 16, 2031. No Option that is intended to be an Incentive Stock Option may be granted under the Plan until the Approval Date. If the Approval Date does not occur within twelve (12) months after the Effective Date, then no Options that are intended to be Incentive Stock Options may be granted under the Plan.

Section 21. Code Section 409A.

The intent of the parties is that payments and benefits under the Plan be either exempt from Code Section 409A or comply with Code Section 409A to the extent subject thereto, and, accordingly, to the maximum extent permitted, the Plan shall be interpreted and be administered consistent with such intent. Any payments described in the Plan that are due within the “short-term deferral period” as defined in Code Section 409A shall not be treated as deferred compensation unless applicable law requires otherwise. Notwithstanding anything to the contrary in the Plan, to the extent required in order to avoid accelerated taxation and/or tax penalties under Code Section 409A, amounts that would otherwise be payable and benefits that would otherwise be provided upon a “separation from service” to a Participant who is a “specified employee” shall be paid on the first business day after the date that is six (6) months following the Participant’s separation from service (or upon the Participant’s death, if earlier). In addition, for purposes of the Plan, each amount to be paid or benefit to be provided to the Participant pursuant to the Plan, which constitute deferred compensation subject to Code Section 409A, shall be construed as a separate identified payment for purposes of Code Section 409A. Nothing contained in the Plan or an Award Agreement shall be construed as a guarantee of any particular tax effect with respect to an Award. The Company does not guarantee that any Awards provided under the Plan will be exempt from or in compliance with the provisions of Code Section 409A, and in no event will the Company be liable for any or all portion of any taxes, penalties, interest or other expenses that may be incurred by a Participant on account of any Award being subject to, but not in compliance with, Code Section 409A.

Section 22. Erroneously Awarded Compensation.

The Plan and all Awards issued hereunder shall be subject to any compensation recovery and/or recoupment policy adopted by the Company to comply with applicable law, including, without limitation, the Dodd-Frank Wall Street Reform and Consumer Protection Act, or to comport with good corporate governance practices, as such policies may be amended from time to time.

Section 23. Governing Law.

The Plan shall be governed by and construed in accordance with the laws of the State of Delaware, without giving effect to principles of conflicts of law of such state.

Section 24. Plan Document Controls.

The Plan and each Award Agreement constitute the entire agreement with respect to the subject matter hereof and thereof; provided, that in the event of any inconsistency between the Plan and such Award Agreement, the terms and conditions of the Plan shall control.

EX-31.1

EXHIBIT 31.1

CERTIFICATION PURSUANT TO SECTION 302

CERTIFICATION OF CEO

I, Charles A. Bacon, III, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarter ended June 30, 2021 of Limbach Holdings, Inc. (the "registrant");

2.Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

	/s/ Charles A. Bacon, III
	Charles A. Bacon, III
	Chief Executive Officer
Date: August 12, 2021

EX-31.2

EXHIBIT 31.2

CERTIFICATION PURSUANT TO SECTION 302

CERTIFICATION OF CFO

I, Jayme L. Brooks, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarter ended June 30, 2021 of Limbach Holdings, Inc. (the "registrant");

2.Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

	/s/ Jayme L. Brooks
	Jayme L. Brooks
	Chief Financial Officer
Date: August 12, 2021

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Limbach Holdings, Inc. (the “Company”) for the quarter ended June 30, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned Charles A. Bacon, III, the Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of the undersigned’s knowledge and belief:

(1)the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. Section 78m(a) or 78o(d)); and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 12, 2021
By	/s/ Charles A. Bacon, III
Charles A. Bacon, III, Chief Executive Officer
(Principal Executive Officer)

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Limbach Holdings, Inc. (the “Company”) for the quarter ended June 30, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned Jayme L. Brooks, the Chief Financial Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of the undersigned’s knowledge and belief:

(1)the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. Section 78m(a) or 78o(d)); and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 12, 2021
By	/s/ Jayme L. Brooks
Jayme L. Brooks, Chief Financial Officer
(Principal Financial Officer)

XML

Cover - shares	6 Months Ended
	Jun. 30, 2021	Aug. 11, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	001-36541
Entity Registrant Name	LIMBACH HOLDINGS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-5399422
Entity Address, Address Line One	1251 Waterfront Place
Entity Address, Address Line Two	Suite 201
Entity Address, City or Town	Pittsburgh
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15222
City Area Code	412
Local Phone Number	359-2100
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	LMB
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,267,841
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001606163
Current Fiscal Year End Date	--12-31

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 27,693	$ 42,147
Restricted cash	113	113
Accounts receivable, net	94,615	85,767
Contract assets	70,815	67,098
Income tax receivable	891	0
Other current assets	5,599	4,292
Total current assets	199,726	199,417
Property and equipment, net	17,433	19,700
Intangible assets, net	11,473	11,681
Goodwill	6,129	6,129
Operating lease right-of-use assets	16,852	18,751
Deferred tax asset	6,393	6,087
Other assets	283	392
Total assets	258,289	262,157
Current liabilities
Current portion of long-term debt	8,454	6,536
Current operating lease liabilities	4,122	3,929
Accounts payable, including retainage	66,954	66,763
Contract liabilities	39,179	46,648
Accrued income taxes	0	1,671
Accrued expenses and other current liabilities	19,215	24,747
Total current liabilities	137,924	150,294
Long-term debt	24,721	36,513
Long-term operating lease liabilities	13,454	15,459
Other long-term liabilities	4,031	6,159
Total liabilities	180,130	208,425
Commitments and contingencies
STOCKHOLDERS’ EQUITY
Common stock, $0.0001 par value; 100,000,000 shares authorized, 10,251,696 issued and outstanding at June 30, 2021 and 7,926,137 at December 31, 2020	1	1
Additional paid-in capital	83,589	57,612
Accumulated deficit	(5,431)	(3,881)
Total stockholders’ equity	78,159	53,732
Total liabilities and stockholders’ equity	$ 258,289	$ 262,157

XML

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Common stock, par or stated value per share (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares, issued (in shares)	10,251,696	7,926,137
Common stock, shares, outstanding (in shares)	10,251,696	7,926,137

XML

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue	$ 121,019	$ 135,185	$ 234,363	$ 273,957
Cost of revenue	102,329	114,850	198,444	235,398
Gross profit	18,690	20,335	35,919	38,559
Operating expenses:
Selling, general and administrative	17,232	13,752	34,377	30,552
Amortization of intangibles	104	274	208	417
Total operating expenses	17,336	14,026	34,585	30,969
Operating income	1,354	6,309	1,334	7,590
Other income (expenses):
Interest expense, net	(452)	(2,137)	(1,716)	(4,295)
Gain (loss) on disposition of property and equipment	94	(13)	8	17
Loss on early debt extinguishment	0	0	(1,961)	0
Gain (loss) on change in fair value of warrant liability	0	(102)	14	59
Total other expenses	(358)	(2,252)	(3,655)	(4,219)
Income (loss) before income taxes	996	4,057	(2,321)	3,371
Income tax provision (benefit)	264	1,110	(771)	476
Net income (loss)	$ 732	$ 2,947	$ (1,550)	$ 2,895
Income (loss) per common share:
Basic (in usd per share)	$ 0.07	$ 0.38	$ (0.16)	$ 0.37
Diluted (in usd per share)	$ 0.07	$ 0.37	$ (0.16)	$ 0.37
Weighted average number of shares outstanding:
Basic (in shares)	10,251,696	7,845,515	9,737,801	7,821,594
Diluted (in shares)	10,469,028	7,905,368	9,737,801	7,878,246

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Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Accumulated deficit
Beginning balance (in shares) at Dec. 31, 2019		7,688,958
Beginning balance at Dec. 31, 2019	$ 46,870	$ 1	$ 56,557	$ (9,688)
Stock-based compensation	295		295
Shares issued related to vested restricted stock units (in shares)		104,905
Shares issued related to vested restricted stock units	0
Net (loss) income	(52)			(52)
Ending balance (in shares) at Mar. 31, 2020		7,793,863
Ending balance at Mar. 31, 2020	47,113	$ 1	56,852	(9,740)
Beginning balance (in shares) at Dec. 31, 2019		7,688,958
Beginning balance at Dec. 31, 2019	46,870	$ 1	56,557	(9,688)
Net (loss) income	2,895
Ending balance (in shares) at Jun. 30, 2020		7,853,377
Ending balance at Jun. 30, 2020	50,200	$ 1	56,992	(6,793)
Beginning balance (in shares) at Mar. 31, 2020		7,793,863
Beginning balance at Mar. 31, 2020	47,113	$ 1	56,852	(9,740)
Stock-based compensation	140		140
Shares issued related to vested restricted stock units (in shares)		59,514
Shares issued related to vested restricted stock units	0
Net (loss) income	2,947			2,947
Ending balance (in shares) at Jun. 30, 2020		7,853,377
Ending balance at Jun. 30, 2020	50,200	$ 1	56,992	(6,793)
Beginning balance (in shares) at Dec. 31, 2020		7,926,137
Beginning balance at Dec. 31, 2020	53,732	$ 1	57,612	(3,881)
Stock-based compensation	677		677
Shares issued related to vested restricted stock units (in shares)		89,446
Shares issued related to vested restricted stock units	0
Tax withholding related to vested restricted stock units	(183)		(183)
Stock issued related to employee stock purchase plan (in shares)		8,928
Shares issued related to employee stock purchase plan	92		92
Shares issued related to exercise of warrants (in shares)		172,869
Shares issued related to the exercise of warrants	1,989		1,989
Shares issued related to offering (in shares)		2,051,025
Shares issued related to sale of common stock	22,773		22,773
Net (loss) income	(2,282)			(2,282)
Ending balance (in shares) at Mar. 31, 2021		10,248,405
Ending balance at Mar. 31, 2021	76,798	$ 1	82,960	(6,163)
Beginning balance (in shares) at Dec. 31, 2020		7,926,137
Beginning balance at Dec. 31, 2020	53,732	$ 1	57,612	(3,881)
Net (loss) income	(1,550)
Ending balance (in shares) at Jun. 30, 2021		10,251,696
Ending balance at Jun. 30, 2021	78,159	$ 1	83,589	(5,431)
Beginning balance (in shares) at Mar. 31, 2021		10,248,405
Beginning balance at Mar. 31, 2021	76,798	$ 1	82,960	(6,163)
Stock-based compensation	636		636
Shares issued related to vested restricted stock units (in shares)		3,291
Shares issued related to vested restricted stock units	0
Tax withholding related to vested restricted stock units	(7)		(7)
Net (loss) income	732			732
Ending balance (in shares) at Jun. 30, 2021		10,251,696
Ending balance at Jun. 30, 2021	$ 78,159	$ 1	$ 83,589	$ (5,431)

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net (loss) income	$ (1,550)	$ 2,895
Adjustments to reconcile net (loss) income to cash (used in) provided by operating activities:
Depreciation and amortization	2,964	3,140
Provision for doubtful accounts	70	27
Stock-based compensation expense	1,313	435
Noncash operating lease expense	2,091	2,025
Amortization of debt issuance costs	220	1,080
Deferred income tax provision	(306)	798
Gain on sale of property and equipment	(8)	(17)
Loss on early debt extinguishment	1,961	0
Gain on change in fair value of warrant liability	(14)	(59)
Changes in operating assets and liabilities:
Accounts receivable	(8,918)	3,588
Contract assets	(3,717)	4,901
Other current assets	(1,306)	(166)
Accounts payable, including retainage	190	(19,519)
Prepaid income taxes	(891)	(171)
Accrued taxes payable	(1,671)	(11)
Contract liabilities	(7,469)	16,254
Operating lease liabilities	(2,004)	(2,399)
Accrued expenses and other current liabilities	(5,450)	9,419
Other long-term liabilities	(114)	237
Net cash (used in) provided by operating activities	(24,609)	22,457
Cash flows from investing activities:
Proceeds from sale of property and equipment	361	64
Advances to joint ventures	0	(1)
Purchase of property and equipment	(501)	(660)
Net cash used in investing activities	(140)	(597)
Cash flows from financing activities:
Proceeds from Wintrust Term Loan	30,000	0
Payments on Wintrust Term Loan	0	7,250
Payments on 2019 Revolving Credit Facility	0	(7,250)
Prepayment penalty and other costs associated with early debt extinguishment	(1,376)	0
Proceeds from the sale of common stock	22,773	0
Proceeds from the exercise of warrants	1,989	0
Payments on finance leases	(1,318)	(1,285)
Payments of debt issuance costs	(593)	0
Taxes paid related to net-share settlement of equity awards	(401)	(90)
Proceeds from contributions to Employee Stock Purchase Plan	221	0
Net cash provided by (used in) financing activities	10,295	(1,375)
(Decrease) increase in cash, cash equivalents and restricted cash	(14,454)	20,485
Cash, cash equivalents and restricted cash, beginning of period	42,260	8,457
Cash, cash equivalents and restricted cash, end of period	27,806	28,942
Noncash investing and financing transactions:
Right of use assets obtained in exchange for new operating lease liabilities	156	0
Right of use assets obtained in exchange for new finance lease liabilities	336	1,050
Right-of-use assets disposed or adjusted modifying operating leases liabilities	36	586
Right-of-use assets disposed or adjusted modifying finance leases liabilities	0	(64)
Interest paid	1,741	3,250
Cash paid for income taxes	2,096	734
Wintrust Term Loan
Cash flows from financing activities:
Payments of Term Loans	(2,000)	0
2019 Refinancing Term Loan
Cash flows from financing activities:
Payments of Term Loans	$ (39,000)	$ 0

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Organization and Plan of Business Operations

6 Months Ended

Jun. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Plan of Business Operations

Organization and Plan of Business Operations

Limbach Holdings, Inc. (the “Company,” “we” or “us”), is a Delaware corporation headquartered in Pittsburgh, Pennsylvania that was formed on July 20, 2016, as a result of a business combination with Limbach Holdings LLC (“LHLLC”). The Company’s condensed consolidated financial statements include the accounts of Limbach Holdings, Inc. and its wholly-owned subsidiaries, including LHLLC, Limbach Facility Services LLC, Limbach Company LLC, Limbach Company LP, Harper Limbach LLC, and Harper Limbach Construction LLC.

As of January 1, 2021, the Company renamed its existing two reportable segments to reflect our two distinct approaches to our customer base and to better align with our owner direct strategy. The previously named Construction Segment is now known as General Contractor Relationships (“GCR”); the previously named Service Segment is now known as Owner Direct Relationships (“ODR”). The Company operates in two segments that are based on the relationship with its customer, (i) GCR, in which the Company generally manages new construction or renovation projects that involve primarily heating, ventilation, and air conditioning (“HVAC”), plumbing, or electrical services awarded to the Company by general contractors or construction managers, and (ii) ODR, in which the Company provides maintenance or service primarily on HVAC, plumbing or electrical systems, building controls and specialty contracting projects direct to, or assigned by, building owners or property managers. This work is primarily performed under fixed price, modified fixed price, and time and material contracts over periods of typically less than two years.

The Company's customers operate in diverse industries including, but not limited to, healthcare, life sciences, data centers, industrial and light manufacturing, entertainment, education and government. The Company operates primarily in the Northeast, Mid-Atlantic, Southeast, Midwest, and Southwestern regions of the United States.

Impact of the COVID-19 Pandemic

In March 2020, the World Health Organization declared the outbreak of COVID-19 a global pandemic. The COVID-19 pandemic has caused significant disruption and volatility on a global scale resulting in, among other things, an economic slowdown and the possibility of a continued economic recession. In response to the COVID-19 outbreak, national and local governments around the world instituted certain measures, including travel bans, restrictions on group events and gatherings, shutdowns of certain non-essential businesses, curfews, shelter-in-place orders and recommendations to practice social distancing. The various governmental actions have abated over time, but remain applicable to Limbach's operations in various ways, often varying by state. In some instances, these orders continued to affect certain projects in our GCR and ODR segments into the first quarter of 2021. In limited instances, during fiscal 2020, projects chose to shutdown work irrespective of the existence or applicability of government action. In most markets, construction is considered an essential business and Limbach continued to staff its projects and perform work during fiscal 2020 and into 2021, and most of the projects that were in progress at the time shutdowns commenced were restarted. The Company’s branches are expecting building owners to maintain or retrofit current facilities in lieu of funding larger capital projects as the effects of the pandemic remain ongoing and uncertain.

During fiscal 2020 and through the second quarter of 2021, the Company continued to take several actions to combat the adverse impacts that the COVID-19 outbreak had on our business including, but not limited to the following:

•    Identification of projects that have been shut down and methods for seeking to preserve any contractual entitlement that may exist to recover monetary and time impacts;

•    Establishment of a task force to identify possible types and areas of impact from COVID-19 for both shutdown and     continuing operations;

•    Examination of the Company's productivity and potential impact on gross profit as a result of COVID-19;

•    Implementation of the Company's pandemic response plan;

•    Implemented our furlough and work schedule reduction plans, as well as permanent reductions in force; and

•    Temporarily suspended substantially all discretionary, non-essential expenditures, including but not limited to, auto allowances, deferral of rent ranging between 1 and 3 months; and

•    A temporary 10% salary reduction for a select group of corporate and regional management, along with a 10% fee reduction in director compensation, and cost reduction opportunities identified by our external consultant.

During the month of July 2020, with the substantial restart and return of project and service work, the Company removed the 10% salary reduction for the select group of corporate and regional management, along with the fee reduction for director compensation, returned auto allowances, reinstated positions, removed schedule reduction plans and discontinued our hiring freeze. During the remainder of 2020 and into 2021, the Company reinstituted limited travel and in-person meetings, along with encouraging employees to return to the office, field and training settings in a partial, flexible manner that is consistent with our Work From Home Policy and our COVID-19 Policy. The Company has remained steadfastly committed to our COVID-19 Policy as our work environment evolves in response to the changing landscape of the pandemic and in response to the increasing availability of vaccinations.

We continue to monitor the short and long term impacts of the pandemic. While our employees and customers have adapted to a new work environment and there continues to be scientific, societal and economic progress to address the effect of COVID-19, there remains significant uncertainty about the future impacts of the pandemic, including the potential effects on our operations. We remain cautiously optimistic about the markets in which we operate and the customers we serve; however, the spread of more contagious variants of the virus, including the current rapid increase of the Delta Variant, may impact economic activity and could cause projects to be delayed or canceled, or we may experience access restrictions to our customers’ facilities and project sites. Additionally, the spread of the Delta Variant has the near-term possibility of causing some state and local governments where we work to reinstitute restrictions that could impact our customers, vendors and our own ability to perform existing projects.

The ongoing effects of the pandemic, including decreased consumer confidence and economic instability, can make it extremely difficult for our customers, our vendors and us to accurately forecast and plan future business activities, and could cause constrained spending on our services, delays and a lengthening of our business development efforts, the demand for more favorable pricing or other terms, and/or difficulty in collection of our accounts receivable. Our clients may face budget deficits or other financial constraints that prohibit them from funding proposed and existing projects. During the fourth quarter of 2020 and the first half of 2021, several of our business units experienced slowdowns in the closing of sales related to the ongoing effects of the pandemic, which impacted our revenue and profitability. These impacts may continue as the pandemic persists. Further, ongoing economic instability in the global markets, including from the pandemic, could limit our ability to access the capital markets at a time when we would like, or need, to raise capital, which could have an impact on our ability to react to changing business conditions or new opportunities. If economic conditions remain uncertain or weaken, or spending continues to be reduced, our financial condition and results of operations may be adversely affected.

The Company continues to take steps to minimize the adverse impacts of the COVID-19 pandemic on its business and to protect the safety of its employees, and the Company continues to emphasize wearing of masks, more frequent washing of hands and tools, social distancing, and work protocols. Limbach's COVID-19 Policy is based on the best practices provided by the Centers for Disease Control and Prevention (“CDC”) and Occupational Safety and Health Administration for essential workers. Our updated Work From Home Policy, along with the Company's business continuity planning and information technology enhancements enabled an orderly transition to remote work and facilitated social distancing for salaried employees. Although the Company has not mandated vaccinations for employees, it is encouraging all employees to be vaccinated, in accordance with CDC recommendations.

Testing and inpatient treatment for COVID-19 is covered under our medical plan and fees have been waived since the onset of the pandemic. Counseling is available through our employee assistance plan to assist employees with financial, mental and emotional stress related to the virus and other issues.

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Significant Accounting Policies

6 Months Ended

Jun. 30, 2021

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

Basis of Presentation

Condensed Consolidated Financial Statements

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with instructions to the Quarterly Report on Form 10-Q and Rule 8-03 of Regulation S-X for smaller reporting companies. Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. Readers of this report should refer to the consolidated financial statements and the notes thereto included in our most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on March 25, 2021.

Unaudited Interim Financial Information

The accompanying interim Condensed Consolidated Balance Sheets, Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Stockholders’ Equity and Condensed Consolidated Statements of Cash Flows for the periods presented are unaudited. Also, within the notes to the Condensed Consolidated Financial Statements, we have included unaudited information for these interim periods. These unaudited interim Condensed Consolidated Financial Statements have been prepared in accordance with GAAP. In our opinion, the accompanying unaudited Condensed Consolidated Financial Statements contain all normal and recurring adjustments necessary for a fair statement of the Company’s financial position as of June 30, 2021, its results of operations and its cash flows for the three and six months ended June 30, 2021. The results for the three and six months ended June 30, 2021 are not necessarily indicative of the results to be expected for the year ending December 31, 2021.

The Condensed Consolidated Balance Sheet as of December 31, 2020 was derived from our audited financial statements included in our Annual Report on Form 10-K filed with the SEC on March 25, 2021, but is presented as condensed and does not contain all of the footnote disclosures from the annual financial statements.

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Accounting Standards

6 Months Ended

Jun. 30, 2021

Accounting Changes and Error Corrections [Abstract]

Accounting Standards

Accounting Standards

Recently Adopted Accounting Standards

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), which affects general principles within Topic 740, and is meant to simplify and reduce the cost of accounting for income taxes. It removes certain exceptions to the general principles in Topic 740 and simplifies areas including franchise taxes that are partially based on income, transactions with a government that result in a step up in the tax basis of goodwill, the incremental approach for intraperiod tax allocation, interim period income tax accounting for year-to-date losses that exceed anticipated losses and enacted changes in tax laws in interim periods. The changes are effective for annual periods beginning after December 15, 2020. The adoption of this pronouncement did not have a material impact on our condensed consolidated financial statements or presentation thereof.

Also in October 2020, the FASB issued ASU 2020-10, Codification Improvements. The amendments in this update remove references to various FASB Concepts Statements, situates all disclosure guidance in the appropriate disclosure section of the Codification, and makes other improvements and technical corrections to the Codification. The amendments in Sections B and C of this amendment are effective for annual periods beginning after December 15, 2020, for public business entities, with early adoption permitted. The adoption of this pronouncement did not have a material impact on our condensed consolidated financial statements or presentation thereof.

Recent Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments, which introduced an expected credit loss methodology for the measurement and recognition of credit losses on most financial instruments, including trade receivables and off-balance sheet credit exposure. Under this guidance, an entity is required to consider a broader range of information to estimate expected credit losses, which may result in earlier recognition of losses. This ASU also requires disclosure of information regarding how a company developed its allowance, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. The guidance is effective for smaller reporting companies on January 1, 2023 with early adoption permitted. The adoption of this standard will be through a cumulative-effect adjustment to retained earnings as of the effective date. Based on our historical experience, the Company does not expect that this pronouncement will have a significant impact in its financial statements or on the estimate of the allowance for doubtful accounts.

The FASB has issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting in March 2020. This new guidance provides optional expedients for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform, on financial reporting. The risk of termination of the London Interbank Offered Rate (LIBOR), has caused regulators to undertake reference rate reform initiatives to identify alternative reference rates that are more observable or transaction based that are less susceptible to manipulation. ASU 2020-04 is effective between March 12, 2020 and December 31, 2022.

In addition, in January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope. The amendments in this update refine the scope for certain optional expedients and exceptions for contract modifications and hedge accounting to apply to derivative contracts and certain hedging relationships affected by the discounting transition. The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the impact of adopting the reference rate reform guidance (both ASU 2020-04 and ASU 2021-01) on its condensed consolidated financial statements. Management has identified that its credit agreement utilizes LIBOR as a benchmark rate. Management will continue to evaluate the impact of adopting reference rate reform as the LIBOR benchmark rate within the credit agreement is phased out.

In August 2020, the FASB issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity and amends the scope guidance for contracts in an entity's own equity. The ASU addresses how convertible instruments are accounted for in the calculation of diluted earnings per share by using the if-converted method. The guidance is effective for all entities for fiscal years beginning after March 31, 2024, albeit early adoption is permitted no earlier than fiscal years beginning after December 15, 2020. Management is currently assessing the impact of this pronouncement on its condensed consolidated financial statements.

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Accounts Receivable and Allowance for Doubtful Accounts

6 Months Ended

Jun. 30, 2021

Receivables [Abstract]

Accounts Receivable and Allowance for Doubtful Accounts

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable and the allowance for doubtful accounts are comprised of the following:

(in thousands)	June 30, 2021		December 31, 2020
Accounts receivable - trade	$	94,881	$	86,033
Allowance for doubtful accounts	(266)		(266)
Accounts receivable, net	$	94,615	$	85,767

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Contract Assets and Liabilities

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Contract Assets and Liabilities

Contract Assets and Liabilities

The Company classifies contract assets and liabilities that may be settled beyond one year from the balance sheet date as current, consistent with the length of time of the Company’s project operating cycle.

Contract assets include costs in excess of billings and estimated earnings and amounts due under retainage provisions. The components of the contract asset balances as of the respective dates were as follows:

(in thousands)	June 30, 2021		December 31, 2020		Change
Contract assets
Costs in excess of billings and estimated earnings	$	38,200	$	31,894	$	6,306
Retainage receivable	32,615		35,204		(2,589)
Total contract assets	$	70,815	$	67,098	$	3,717

Retainage receivable represents amounts invoiced to customers where payments have been partially withheld, typically 10%, pending the completion of certain milestones, satisfaction of other contractual conditions or the completion of the project. Retainage agreements vary from project to project and balances could be outstanding for several months or years depending on a number of circumstances such as contract-specific terms, project performance and other variables that may arise as the Company makes progress towards completion.

Contract assets represent the excess of contract costs and profits (or contract revenue) over the amount of contract billings to date and are classified as a current asset. Contract assets result when either: 1) the appropriate contract revenue amount has been recognized over time in accordance with ASC Topic 606, but a portion of the revenue recorded cannot be currently billed due to the billing terms defined in the contract, or 2) costs are incurred related to certain claims and unapproved change orders. Claims occur when there is a dispute regarding both a change in the scope of work and the price associated with that change. Unapproved change orders occur when a change in the scope of work results in additional work being performed before the parties have agreed on the corresponding change in the contract price. The Company routinely estimates recovery related to claims and unapproved change orders as a form of variable consideration at the most likely amount it expects to receive and to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Claims and unapproved change orders are billable upon the agreement and resolution between the contractual parties and after the execution of contractual amendments. Increases in claims and unapproved change orders typically result from costs being incurred against existing or new positions; decreases normally result from resolutions and subsequent billings.

The current estimated net realizable value on such claims and unapproved change orders as recorded in contract assets and contract liabilities in the condensed consolidated balance sheets was $40.1 million and $33.6 million as of June 30, 2021 and December 31, 2020, respectively. The Company anticipates that the majority of such amounts will be approved or executed within one year. The resolution of these claims and unapproved change orders may require litigation or other forms of dispute resolution proceedings.

Contract liabilities include billings in excess of costs and estimated earnings and provisions for losses. The components of the contract liability balances as of the respective dates were as follows:

(in thousands)	June 30, 2021		December 31, 2020		Change
Contract liabilities
Billings in excess of costs and estimated earnings	$	38,611	$	46,020	$	(7,409)
Provisions for losses	568		628		(60)
Total contract liabilities	$	39,179	$	46,648	$	(7,469)

Billings in excess of costs and estimated earnings represent the excess of contract billings to date over the amount of contract costs and profits (or contract revenue) recognized to date. The balance may fluctuate depending on the timing of contract billings and the recognition of contract revenue.

Provisions for losses are recognized in the condensed consolidated statements of operations at the uncompleted performance obligation level for the amount of total estimated losses in the period that evidence indicates that the estimated total cost of a performance obligation exceeds its estimated total revenue.

The net overbilling position for contracts in process consist of the following:

(in thousands)	June 30, 2021		December 31, 2020
Revenue earned on uncompleted contracts	$	691,473	$	752,564
Less: Billings to date	(691,884)		(766,690)
Net overbilling	$	(411)	$	(14,126)
(in thousands)	June 30, 2021		December 31, 2020
Costs in excess of billings and estimated earnings	$	38,200	$	31,894
Billings in excess of costs and estimated earnings	(38,611)		(46,020)
Net overbilling	$	(411)	$	(14,126)

For the three and six months ended June 30, 2021 and 2020, we recorded revisions in our contract estimates for certain GCR and ODR projects.

For the three months ended June 30, 2021 and 2020, total net gross profit write-downs were $1.1 million and $2.0 million, respectively. For projects having a material gross profit impact of $0.25 million or more for the three months ended June 30, 2021, this resulted in material gross profit write downs on three GCR segment projects of $1.7 million and one ODR project for $0.3 million. Of the material GCR segment write downs, one project was within the Michigan region for a total of $1.0 million, one project was within the New England region for $0.3 million and one project was within the Southern California region for $0.4 million. Of the material ODR segment write downs, one project was within the Eastern Pennsylvania region for $0.3 million. We also recorded material gross profit write ups of $0.3 million on one GCR segment project in the Florida region and $0.3 million on one ODR segment project in the Michigan region. For the three months ended June 30, 2020, we recorded material revisions in our contract estimates on four GCR projects which resulted in gross profit write downs of $1.5 million. Two of these projects were within the Southern California region for a total of $0.7 million. No project revisions resulting in material gross profit write ups were recorded during the three months ended June 30, 2020.

For the six months ended June 30, 2021 and 2020, total net gross profit write-downs were $1.7 million and $3.4 million, respectively. For projects having a material gross profit impact of $0.25 million or more, we recorded gross profit write downs on eight GCR segment projects of $3.5 million and one ODR project for $0.3 million. Of the material GCR segment write downs, two projects were within the Michigan region for a total of $1.2 million, two projects were within the Eastern Pennsylvania region for $1.0 million, two projects were within the Southern California region for $0.8 million, one project was within the New England region for $0.3 million, and one project was within the Mid-Atlantic region for $0.3 million. We also materially wrote down one ODR segment project within the Eastern Pennsylvania region for $0.3 million. We also recorded material GCR segment gross profit write ups of $0.9 million on one GCR segment project in the Michigan region for $0.5 million and one project within the Ohio region for $0.4 million. For the six months ended June 30, 2020, we recorded material gross profit write downs on eight GCR projects and two gross profit write ups on GCR projects, for an aggregate revision of $5.2 million and $1.2 million, respectively.

Remaining Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and exclude unexercised contract options. The Company’s remaining performance obligations includes projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions.

As of June 30, 2021, the aggregate amount of the transaction prices allocated to the remaining performance obligations of the Company's GCR and ODR segment contracts were $378.9 million and $44.2 million, respectively. As of December 31, 2020, the aggregate amount of the transaction prices allocated to the remaining performance obligations of the Company's GCR and ODR segment contracts were $393.5 million and $35.7 million, respectively.

We estimate that 44% and 62% of our GCR and ODR segment remaining performance obligations as of June 30, 2021, respectively, will be recognized as revenue during 2021, with the substantial majority of remaining performance obligations to be recognized within 24 months, although the timing of the Company's performance is not always under its control.

Additionally, the difference between remaining performance obligations and backlog is due to the exclusion of a portion of the Company’s ODR agreements under certain contract types from the Company’s remaining performance obligations as these contracts can be canceled for convenience at any time by the Company or the customer without considerable cost incurred by the customer. Additional information related to backlog is provided in “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this Quarterly Report on Form 10-Q.

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Goodwill and Intangibles

6 Months Ended

Jun. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles

Goodwill and Intangibles

Goodwill was $6.1 million at both June 30, 2021 and December 31, 2020. The goodwill is associated with the Company's ODR segment. Intangible assets are comprised of the following:

(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
June 30, 2021(1)
Amortized intangible assets:
Customer Relationships – ODR	$	4,710	$	(3,312)	$	1,398
Favorable Leasehold Interests(2)	190		(75)		115
Total amortized intangible assets	4,900		(3,387)		1,513
Unamortized intangible assets:
Trade Name	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	14,860	$	(3,387)	$	11,473

(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
December 31, 2020(1)
Amortized intangible assets:
Customer Relationships – ODR	$	4,710	$	(3,112)	$	1,598
Favorable Leasehold Interests	530		(407)		123
Total amortized intangible assets	5,240		(3,519)		1,721
Unamortized intangible assets:
Trade Name	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	15,200	$	(3,519)	$	11,681

(1)     The Backlog-Construction intangible asset previously shown at December 31, 2020 has been fully amortized. Accordingly, its gross carrying amount of $4.8 million and corresponding accumulated amortization of $4.8 million have been removed from the table.

(2)     The gross carrying amount and accumulated amortization associated with our Favorable leasehold interests intangible asset was reduced by $0.3 million due to the lease termination of our Western Pennsylvania office associated with the intangible asset.

The definite-lived intangible assets are amortized over the period the Company expects to receive the related economic benefit, which for customer relationships is based upon estimated future net cash inflows. The Company has previously determined that its trade name has an indefinite useful life. The Limbach trade name has been in existence since the Company’s founding in 1901 and therefore is an established brand within the industry.

Total amortization expense for these amortizable intangible assets was $0.1 million and $0.2 million for the three and six months ended June 30, 2021, respectively, and $0.3 million and $0.4 million for the three and six months ended June 30, 2020, respectively.

The Company did not recognize any impairment charges on its goodwill or intangible assets for the three and six months ended June 30, 2021 or 2020.

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Debt

6 Months Ended

Jun. 30, 2021

Debt Disclosure [Abstract]

Debt

Debt

Long-term debt consists of the following obligations as of:

(in thousands)	June 30, 2021		December 31, 2020
2019 Refinancing Term Loan - term loan payable in quarterly installments of principal, (commencing in September 2020) plus interest through April 2022	$	—	$	39,000
2019 Refinancing Revolving Credit Facility	—		—
Wintrust Term Loan - term loan payable in quarterly installments of principal, (commencing in March 2021) plus interest through February 2026	28,000		—
Wintrust Revolving Loan	—		—
Finance leases – collateralized by vehicles, payable in monthly installments of principal, plus interest ranging from 4.70% to 6.45% through 2025	5,476		6,459
Total debt	33,476		45,459
Less - Current portion of long-term debt	(8,454)		(6,536)
Less - Unamortized discount and debt issuance costs	(301)		(2,410)
Long-term debt	$	24,721	$	36,513

The Company refinanced its 2019 Refinancing Term Loan and 2019 Refinancing Revolving Credit Facility on February 24, 2021, described below and therefore had no amounts outstanding under these agreements at June 30, 2021. Accordingly, the Company recognized a loss on the early debt extinguishment related to the refinancing of $2.0 million on the refinancing date. This loss consisted of the write-off of $2.6 million of debt issuance and debt discount costs, the reversal of the $2.0 million CB warrants liability due to the warrants being cancelled on the refinancing date and the prepayment penalty and other extinguishment costs of $1.4 million.

2019 Refinancing Agreement

On April 12, 2019 (the “Refinancing Closing Date”), Limbach Facility Services LLC (“LFS”) entered into a financing agreement (the “2019 Refinancing Agreement”) with the lenders thereto and Cortland Capital Market Services LLC, as collateral agent and administrative agent and CB Agent Services LLC, as origination agent (“CB”). The 2019 Refinancing Agreement consisted of (i) a $40.0 million term loan (the “2019 Refinancing Term Loan”) and (ii) a new $25.0 million multi-draw delayed draw term loan (the “2019 Delayed Draw Term Loan” and, collectively with the 2019 Refinancing Term Loan, the “2019 Term Loans”). Proceeds from the 2019 Refinancing Term Loan were used to repay the then existing Credit Agreement, to pay related fees and expenses thereof and to fund working capital of the 2019 Refinancing Borrowers (defined below). Management intended for proceeds of the 2019 Delayed Draw Term Loan to be used to fund permitted acquisitions under the 2019 Refinancing Agreement and related fees and expenses in connection therewith.

LFS and each of its subsidiaries were borrowers (the “2019 Refinancing Borrowers”) under the 2019 Refinancing Agreement. In addition, the 2019 Refinancing Agreement was guaranteed by the Company and LHLLC (each, a “2019 Refinancing Guarantor”, and together with the 2019 Refinancing Borrowers, the “Loan Parties”).

The 2019 Refinancing Agreement was secured by a first-priority lien on the real property of the Loan Parties and a second-priority lien on substantially all other assets of the Loan Parties, behind the 2019 ABL Credit Agreement (as defined below). The respective lien priorities of the 2019 Refinancing Agreement and the 2019 ABL Credit Agreement were governed by an intercreditor agreement.

2019 Refinancing Agreement - Interest Rates and Fees

The interest rate on borrowings under the 2019 Refinancing Agreement was, at the 2019 Refinancing Borrowers’ option, either LIBOR (with a 2.00% floor) plus 11.00% or a base rate (with a 3.00% minimum) plus 10.00%. At February 24, 2021 (the 2021 refinancing date) and June 30, 2020, the interest rate in effect on the 2019 Refinancing Term Loan was 13.00%.

2019 Refinancing Agreement - Other Terms and Conditions

The 2019 Refinancing Agreement was set to mature on April 12, 2022, subject to certain adjustment. Required amortization was $1.0 million per quarter and commenced with the fiscal quarter ending September 30, 2020. There was an unused line fee of 2.0% per annum on the undrawn portion of the 2019 Delayed Draw Term Loan, and there was a make-whole premium on prepayments made prior to the 19-month anniversary of the Refinancing Closing Date. This make-whole provision guaranteed that the Company would pay no less than 18 months’ applicable interest to the lenders under the 2019 Refinancing Agreement.

The 2019 Refinancing Agreement contained representations and warranties, and covenants which were customary for debt facilities of this type. Unless the Required Lenders (as defined in the 2019 Refinancing Agreement) otherwise consented in writing, the covenants limited the ability of the Company and its restricted subsidiaries to, among other things, (i) incur additional indebtedness or issue preferred stock, (ii) pay dividends or make distributions to the Company’s stockholders, (iii) purchase or redeem the Company’s equity interests, (iv) make investments, (v) create liens on their assets, (vi) enter into transactions with the Company’s affiliates, (vii) sell assets and (viii) merge or consolidate with, or dispose of substantially all of the Company’s assets to, other companies.

In addition, the 2019 Refinancing Agreement included customary events of default and other provisions that could require all amounts due thereunder to become immediately due and payable, either automatically or at the option of the lenders, if the Company failed to comply with the terms of the 2019 Refinancing Agreement or if other customary events occur.

Furthermore, the 2019 Refinancing Agreement also contained two financial maintenance covenants for the 2019 Refinancing Term Loan, including a requirement to have sufficient collateral coverage of the aggregate outstanding principal amount of the 2019 Term Loans and as of the last day of each month for the total leverage ratio of the Company and its subsidiaries (the “Total Leverage Ratio”) not to exceed an amount beginning at 4.25 to 1.00 through June 30, 2019, and stepping down to 2.00 to 1.00 effective July 1, 2021. From July 1, 2019 through September 30, 2019, the Total Leverage Ratio may not exceed 4.00 to 1.00. In addition, the parties to the 2019 Refinancing Agreement entered into an amendment which, among other changes, revised the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 through the term of such agreement. The 2019 Refinancing Agreement contained a post-closing covenant requiring the remediation of the Company’s material weakness, as described in Item 9A of its 2018 Annual Report on Form 10-K, no later than December 31, 2020 and provision for updates as to the progress of such remediation, provided that, if such remediation was not completed on or prior to December 31, 2019, (x) the Company would be required to pay the post-closing fee pursuant to the terms of the Origination Agent Fee Letter (as defined in the 2019 Refinancing Agreement) and (y) the applicable margin shall be increased by 1.00% per annum for the period from January 1, 2020 until the date at which the material weakness was no longer disclosed or required to be disclosed in the Company’s SEC filings or audited financial statements of the Company or related auditor’s reports.

In connection with the 2019 Refinancing Amendment Number One and Waiver, dated November 14, 2019, the parties amended certain provisions of the 2019 Refinancing Agreement, including, among other changes to: (i) require, commencing October 1, 2019, a 3.00% increase in the interest rate on borrowings under the 2019 Refinancing Agreement; (ii) require the approval of CB and, generally, the lenders representing at least 50.1% of the aggregate undrawn term loan commitment or unpaid principal amount of the 2019 Term Loans, prior to effecting any permitted acquisition; (iii) revise the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 and thereafter through the term of the 2019 Refinancing Agreement; and (iv) require the liquidity of the loan parties, which is generally calculated by adding (a) unrestricted cash on hand of the Loan Parties maintained in deposit accounts subject to control agreements granting control to the collateral agent for the 2019 ABL Credit Agreement, to (b) the difference between (1) the lesser of (x) $15 million, as adjusted from time to time, and (y) 75% of certain customer accounts resulting from the sale of goods or services in the ordinary course of business minus certain reserves established by the administrative agent and (2) the sum of (x) the outstanding principal balance of all revolving loans under the 2019 ABL Credit Agreement plus (y) the aggregate undrawn available amount of all letters of credit then outstanding plus the amount of any obligations that arise from any draw against any letter of credit that have not been reimbursed by the borrowers or funded with a revolving loan under the 2019 ABL Credit Agreement (the “Loan Parties Liquidity”), as of the last day of any fiscal month ending on or after November 30, 2019, of at least $10,000,000. As a condition to executing the 2019 Refinancing Amendment Number One and Waiver, the loan parties were required to pay a non-refundable waiver fee of $400,000 and a non-refundable amendment fee of $1,000,000 (the “PIK First Amendment Fee”, which shall be paid in kind by adding the PIK First Amendment Fee to the outstanding principal amount of the 2019 Refinancing Term Loan as additional principal obligations thereunder on and as of the effective date 2019 Refinancing Amendment Number One and Waiver).

During December 2020, the Company was not in compliance with the collateral coverage debt covenant as defined by the 2019 Term Loan financing agreement. The Company was required to maintain at all times a Collateral Coverage Amount (as defined in the 2019 Refinancing Term Loan financing agreement) equal to or greater than the aggregate outstanding principal amount of the 2019 Term Loans. The Company calculated its Collateral Coverage amount at $37.9 million as of December 31, 2020, the aggregate outstanding principal amount of Term Loans was $39.0 million as of that same date for an excess of debt over collateral of $1.1 million. On February 1, 2021, the Company, LFS and LHLLC entered into a Waiver - Collateral Coverage Amount (December 2020) ("December 2020 Waiver") with the lenders party thereto and Cortland Capital Market Services LLC as collateral agent and administrative agent. The December 2020 Waiver included a waiver of the Company's compliance with the Collateral Coverage Amount for the month ending December 31, 2020. The lender waived the event of default arising from this noncompliance as of December 31, 2020, while reserving its rights with respect to covenant compliance in future months.

The 2019 Refinancing Term Loan was paid in full on February 24, 2021 as part of the refinancing transaction.

2019 Refinancing Agreement - CB Warrants

In connection with the 2019 Refinancing Agreement, on the Refinancing Closing Date, the Company issued to CB and the other lenders under the 2019 Refinancing Agreement warrants (the “CB Warrants”) to purchase up to a maximum of 263,314 shares of the Company's common stock at an exercise price of $7.63 per share subject to certain adjustments, including for stock dividends, stock splits or reclassifications. The actual number of shares of common stock into which the CB Warrants were exercisable at any given time were equal to: (i) the product of (x) the number of shares equal to 2% of the Company’s issued and outstanding shares of common stock on the Refinancing Closing Date on a fully diluted basis and (y) the percentage of the total 2019 Delayed Draw Term Loan made as of the exercise date, minus (ii) the number of shares previously issued under the CB Warrants. As of the Refinancing Closing Date through February 24, 2021, no amounts had been drawn on the 2019 Delayed Draw Term Loan, so no portion of the CB Warrants were exercisable. The CB Warrants were to be exercised for cash or on a “cashless basis,” subject to certain adjustments, at any time after the 2019 Refinancing Closing Date until the expiration of such warrant at 5:00 p.m., New York time, on the earlier of (i) the five (5) year anniversary of the 2019 Refinancing Closing Date, or (ii) the liquidation of the Company. 

Accounting for the 2019 Term Loans and CB Warrants

The CB Warrants represented a freestanding financial instrument that was classified as a liability because the CB Warrants met the definition of a derivative instrument that does not meet the equity scope exception (i.e., the CB Warrants were not indexed to the entity’s own equity). In addition, the material weakness penalty described above was evaluated as an embedded derivative liability and bifurcated from the 2019 Term Loans as it represented a non-credit related embedded feature that provides for net settlement. Both the CB Warrants liability and the embedded derivative liability were required to be initially and subsequently measured at fair value. The initial fair values of the CB Warrants liability and the embedded derivative liability approximated $0.9 million and $0.4 million, respectively, on the Refinancing Closing Date. The Company estimated these fair values by using the Black-Scholes-Merton option pricing model and a probability-weighted discounted cash flow approach.

The CB Warrants liability was included in other long-term liabilities. The Company remeasured the fair value of the CB Warrants liability as of December 31, 2020 and February 24, 2021 prior to the refinancing date and recorded any adjustments as other income (expense). At both February 24, 2021 and December 31, 2020, the CB Warrants liability was $2.0 million. Due to the extinguishment of the CB Warrants on February 24, 2021, there was no liability associated with the CB Warrants recorded as of June 30, 2021. For the six months ended June 30, 2021, the Company recorded other income of $0.1 million to reflect the change in the fair value of the CB Warrants liability. The Company did not record a change in fair value of the warrant liability during the three months ended June 30, 2021 as the CB Warrants liability was extinguished as part of the debt refinancing on February 24, 2021. For the three and six months ended June 30, 2020, the Company recorded other income of $0.1 million and other expense of $0.1 million to reflect the change in the CB Warrants liability.

The proceeds for the 2019 Refinancing Term Loan were first allocated to the CB Warrants liability and embedded derivative liability based on their respective fair values with a corresponding amount of $1.3 million recorded as a debt discount to the 2019 Term Loans. In addition, the Company incurred approximately $3.9 million of debt issuance costs, including $1.4 million related to the first amendment, for the 2019 Term Loans that have also been recorded as a debt discount. The combined debt discount from the CB Warrants liability, embedded derivative liability and the debt issuance costs were being amortized into interest expense over the term of the 2019 Term Loans using the effective interest method and were expensed on the refinancing date as a loss on early debt extinguishment. The Company recorded interest expense for the amortization of the CB Warrants liability and embedded derivative debt discounts of $0.1 million for the six months ended June 30, 2021. The Company did not record interest expense for the amortization of the CB Warrants liability and embedded derivative liability debt discounts for the three months ended June 30, 2021 as these debt discounts were extinguished as part of the debt refinancing on February 24, 2021. The Company recorded interest expense for the amortization of the CB Warrants liability and embedded derivative debt discounts of $0.1 million and $0.2 million for the three and six months ended June 30, 2020, respectively.

In addition to the amortization of the debt discounts into interest expense, the Company recorded $0.1 million of interest expense for the amortization of debt issuance costs related to the 2019 Refinancing Term Loan for the six months ended June 30, 2021. The Company did not record any interest expense for the amortization of debt issuance costs for the three months ended June 30, 2021 as the debt issuance costs were extinguished as part of the debt refinancing on February 24, 2021. For the three and six months ended June 30, 2020, the Company recorded an additional $0.4 million and $0.7 million of interest expense, respectively, for the amortization of the debt issuance costs related to the 2019 Refinancing Term Loan.

2019 ABL Credit Agreement

On the Refinancing Closing Date, LFS also entered into a financing agreement with the lenders thereto and Citizens Bank, N.A., as collateral agent, administrative agent and origination agent (the “2019 ABL Credit Agreement” and, together with the 2019 Refinancing Agreement, the “Refinancing Agreements”). The 2019 ABL Credit Agreement consisted of a $15.0 million revolving credit facility (the “2019 Revolving Credit Facility”). Proceeds of the 2019 Revolving Credit Facility were to be used for general corporate purposes. On the Refinancing Closing Date, the Company had nothing drawn on the ABL Credit Agreement and $14.0 million of available borrowing capacity thereunder (net of a $1.0 million reserve imposed by the lender).

The 2019 Refinancing Borrowers and 2019 Refinancing Guarantors under the 2019 ABL Credit Agreement were the same as under the 2019 Refinancing Agreement. The 2019 ABL Credit Agreement was secured by a second-priority lien on the real property of the Loan Parties (behind the 2019 Refinancing Agreement) and a first-priority lien on substantially all other assets of the Loan Parties.

2019 ABL Credit Agreement - Interest Rates and Fees

The interest rate on borrowings under the 2019 ABL Credit Agreement was, at the 2019 Refinancing Borrowers’ option, either LIBOR (with a 2.0% floor) plus an applicable margin ranging from 3.00% to 3.50% or a base rate (with a 3.0% minimum) plus an applicable margin ranging from 2.00% to 2.50%. At February 24, 2021 (the 2021 refinancing date) and June 30, 2020, the interest rate in effect on the 2019 ABL Credit Agreement was 5.25%.

2019 ABL Credit Agreement - Other Terms and Conditions

The 2019 ABL Credit Agreement was set to mature on April 12, 2022. There was also an unused line fee ranging from 0.250% to 0.375% per annum on undrawn amounts.

The 2019 ABL Credit Agreement contained representations and warranties, and covenants which are customary for debt facilities of this type. Unless the Required Lenders otherwise consented in writing, the covenants limited the ability of the Company and its restricted subsidiaries to, among other things, generally, to (i) incur additional indebtedness or issue preferred stock, (ii) pay dividends or make distributions to the Company’s stockholders, (iii) purchase or redeem the Company’s equity interests, (iv) make investments, (v) create liens on their assets, (vi) enter into transactions with the Company’s affiliates, (vii) sell assets other than in the ordinary course of business or another permitted disposition of assets and (viii) merge or consolidate with, or dispose of substantially all of the Company’s assets to, other companies.

The 2019 ABL Credit Agreement included customary events of default and other provisions that could require all amounts due thereunder to become immediately due and payable, either automatically or at the option of the lenders, if the Company failed to comply with the terms of the 2019 ABL Credit Agreement or if other customary events occur.

The 2019 ABL Credit Agreement also contained a financial maintenance covenant for the 2019 Revolving Credit Facility, which is a requirement for the Total Leverage Ratio of the Company and its subsidiaries not to exceed an amount beginning at 4.00 to 1.00 through September 30, 2019, and stepping down to 1.75 to 1.00 effective July 1, 2021. In addition, the parties to the 2019 ABL Credit Agreement entered into an amendment which, among other changes revises the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 through the term of such agreement.

In connection with the 2019 ABL Credit Amendment Number One and Waiver, the parties amended certain provisions of the 2019 ABL Credit Agreement, including, among other changes to (i) require the approval of the origination agent and, generally, the lenders representing at least 50.1% of the aggregate undrawn revolving loan commitment or unpaid principal amount of the 2019 Term Loans, prior to effecting any permitted acquisition; (ii) revise the maximum permitted Total Leverage Ratio, starting at 3.30 to 1.00 on October 1, 2019 with a peak ratio of 4.25 during March 2020 along with varying monthly rates culminating in the lowest Total Leverage Ratio of 2.00 to 1.00 on April 1, 2021 through the term of the 2019 ABL Credit Agreement; and (iii) require the Loan Parties Liquidity as of the last day of any fiscal month ending on or after November 30, 2019, of at least $10,000,000, as described above in the Amendment Number One to 2019 Refinancing Agreement and Waiver. As a condition to executing the 2019 ABL Credit Amendment Number One and Waiver, the loan parties were required to pay a non-refundable waiver fee of $7,500.

As noted above in the section titled: 2019 Refinancing Agreement - Other Terms and Conditions, the Company was subject to cross-default under our 2019 Revolving Credit Facility as a result of our failure to satisfy the Collateral Coverage Amount as defined in the 2019 Term Loan financing agreement, which required the company to obtain a waiver. Accordingly, on February 1, 2021, the Company, LFS and LHLLC entered into a Waiver - Collateral Coverage Amount (December 2020) (“December 2020 Waiver”) with the lenders party thereto and Citizens Bank, N.A., as collateral agent and administrative agent. The December 2020 Waiver included a waiver of the Company's compliance with the Collateral Coverage Amount for the month ending December 31, 2020. The lender has waived the event of default arising from this noncompliance as of December 31, 2020, while reserving its rights with respect to covenant compliance in future months.

At February 24, 2021 (the 2021 refinancing date) and December 31, 2020, the Company had irrevocable letters of credit in the amount of $3.4 million with its lender to secure obligations under its self-insurance program.

Accounting for the 2019 ABL Credit Agreement

The Company incurred approximately $0.9 million of debt issuance costs for the 2019 ABL Credit Agreement that had been recorded as a non-current deferred asset. The deferred asset was amortized into interest expense over the term of the 2019 Term ABL Credit Agreement using the effective interest method and then expensed on the February 24, 2021 refinancing date as a loss on early debt extinguishment. The Company recorded $0.1 million of interest expense for the amortization of debt issuance costs for the six months ended June 30, 2021. The Company did not record any interest expense for the amortization of debt issuance costs for the three months ended June 30, 2021 as the debt issuance costs were extinguished as part of the debt refinancing on February 24, 2021. For both the three and six months ended June 30, 2020, the Company recorded $0.1 million of interest expense for the amortization of debt issuance costs.

Wintrust Term and Revolving Loans

On February 24, 2021, LFS, LHLLC and the direct and indirect subsidiaries of LFS from time to time included as parties to the agreement (the “Wintrust Guarantors”) entered into a Credit Agreement (the “Credit Agreement”) by and among the LFS, LHLLC, Wintrust Guarantors, the lenders party thereto from time to time, Wheaton Bank & Trust Company, N.A., a subsidiary of Wintrust Financial Corporation (collectively, “Wintrust”), as administrative agent and L/C issuer, Bank of the West as documentation agent, M&T Bank as syndication agent, and Wintrust as lead arranger and sole book runner.

In accordance with the terms of the Credit Agreement, Lenders provide to LFS (i) a $30.0 million senior secured term loan (the “Wintrust Term Loan”); and (ii) a $25.0 million senior secured revolving credit facility with a $5.0 million sublimit for the issuance of letters of credit (the “Wintrust Revolving Loan” and, together with the Wintrust Term Loan, the “Wintrust Loans”). Proceeds of the Wintrust Loans were used to refinance certain existing indebtedness, finance working capital and other general corporate purposes and fund certain fees and expenses associated with the closing of the Wintrust Loans.

The Wintrust Revolving Loan bears interest, at the LFS’s option, at either LIBOR (with a 0.25% floor) plus 3.5% or a base rate (with a 3.0% floor) plus 0.50%, subject to a 50 basis point step-down based on the ratio between the senior debt of the Company and its subsidiaries to the EBITDA (earnings before interest, income taxes, depreciation and amortization) of the LFS and its subsidiaries for the most recently ended four fiscal quarters (the “Senior Leverage Ratio”). The Wintrust Term Loan bears interest, at LFS’s option, at either LIBOR (with a 0.25% floor) plus 4.0% or a base rate (with a 3.0% floor) plus 1.00%, subject to a 50 (for LIBOR) or 75 (for base rate) basis point step-down based on the Senior Leverage Ratio.

LFS is required to make principal payments on the Wintrust Term Loan in $0.5 million installments on the last business day of each month commencing on March 31, 2021 with a final payment of all principal and interest not sooner paid on the Wintrust Term Loan due and payable on February 24, 2026. The Wintrust Revolving Loan will mature and become due and payable by LFS on February 24, 2026.

The Wintrust Loans are secured by (i) a valid, perfected and enforceable lien of the administrative agent on the ownership interests held by each of LFS and Wintrust Guarantors in their respective subsidiaries; and (ii) a valid, perfected and enforceable lien of the administrative agent on each of LFS and Wintrust Guarantors’ personal property, fixtures and real estate, subject to certain exceptions and limitations. Additionally, the re-payment of the Wintrust Loans shall be jointly and severally guaranteed by each Wintrust Guarantor.

The Credit Agreement contains representations and warranties, covenants and events of default that are customary for facilities of this type, as more particularly described in the Credit Agreement. The Wintrust Loans also contain three financial maintenance covenants, including (i) a requirement to have as of the last day of each quarter for the senior leverage ratio of the Company and its subsidiaries not to exceed an amount beginning at 2.25 to 1.00 through December 31, 2021, and stepping down to 2.00 to 1.00 at all times thereafter, (ii) a fixed charge coverage ratio of not less than 1.20 to 1.00 as of the last day of each fiscal quarter commencing with the fiscal quarter ending March 31, 2021, and (iii) no unfinanced capital expenditures, except for unfinanced capital expenditures in the ordinary course of business not exceeding in the aggregate $4.0 million during any fiscal year; and no default or event of default (as defined by the agreement) has occurred and is continuing, 50% of any portion of this annual limit, if not expended in the fiscal year for which it is permitted, may be carried over for expenditure in the next following fiscal year as stipulated by the agreement. LFS and its affiliates maintain various commercial and service relationships with certain members of the syndicate and their affiliates in the ordinary course of business. As of June 30, 2021, the Company was in compliance with all financial maintenance covenants as required by the Wintrust Loans.

The following is a summary of the additional margin and commitment fees payable on the available Wintrust Term Loan and Wintrust Revolving Loan credit commitment:

Level	Senior Leverage Ratio	Additional Margin for Prime Rate loans		Additional Margin for Prime Revolving loans		Additional Margin for Eurodollar Term loans		Additional Margin for Eurodollar Revolving loans		Commitment Fee
I	Greater than 1.00 to 1.00	1.00	%	0.50	%	4.00	%	3.50	%	0.25	%
II	Less than or equal to 1.00 to 1.00	0.25	%	—	%	3.50	%	3.00	%	0.25	%

At June 30, 2021, the interest rate in effect on the Wintrust Term Loan was 4.25% and the interest rate in effect on the Wintrust Revolving Loan was 3.75%.

At June 30, 2021, the Company had irrevocable letters of credit in the amount of $3.4 million with its lender to secure obligations under its self-insurance program.

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Equity

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

Equity

Equity

The Company’s second amended and restated certificate of incorporation currently authorizes the issuance of 100,000,000 shares of common stock, par value $0.0001, and 1,000,000 shares of preferred stock, par value $0.0001. The Public, Private and $15 Exercise Price Sponsor warrants were issued in conjunction with the Company's initial public offering and the Merger and Additional Merger warrants were issued in conjunction with the business combination with LHLLC.

	June 30, 2021	December 31, 2020
Public Warrants(1)(5)	2,140,219	2,300,000
Private Warrants(1)(5)	99,000	99,000
$15 Exercise Price Sponsor Warrants(2)(5)	600,000	600,000
Merger Warrants(3)(6)	629,643	631,119
Additional Merger Warrants(4)(6)	935,068	946,680
Total	4,403,930	4,576,799

(1) Exercisable for one-half of one share of common stock at an exercise price of $5.75 per half share ($11.50 per whole share)

(2) Exercisable for one share of common stock at an exercise price of $15.00 per share

(3) Exercisable for one share of common share at an exercise price of $12.50 per share

(4) Exercisable for one share of common stock at an exercise price of $11.50 per share

(5) Issued under a warrant agreement dated July 15, 2014, between Continental Stock Transfer and Trust Company, as warrant agent, and the Company

(6) Issued to the sellers of LHLLC

Subsequent to June 30, 2021, on July 20, 2021, the Public Warrants, Private Warrants, and Additional Merger Warrants expired by their terms.

On May 24, 2020 the Board of Directors approved further amendments to the Company's amended and restated Omnibus Incentive Plan to increase the number of shares of the Company's common stock that may be issued pursuant to awards by 500,000, for a total of 1,650,000 shares, and extend the term of the plan so that it will expire on the tenth anniversary of the date the stockholders approve the Amended Incentive Plan. The amendments were approved by the Company's stockholders at the Annual Meeting held on July 14, 2020.

On March 9, 2021, the Board of Directors approved further amendments to the Company's amended and restated Omnibus Incentive Plan to increase the number of shares of the Company's common stock that may be issued pursuant to awards by 600,000, for a total of 2,250,000 shares, and extend the term of the plan so that it will expire on the tenth anniversary of the date the stockholders approve the Amended Incentive Plan. The amendments were approved by the Company's stockholders at the Annual Meeting held on June 16, 2021.

See Note 17 - Management Incentive Plans for RSUs granted, vested, forfeited and remaining unvested.

Upon approval of the Company's stockholders on May 30, 2019, the Company adopted the Limbach Holdings, Inc. 2019 Employee Stock Purchase Plan (“the ESPP”). On January 1, 2020, the ESPP went into effect. The ESPP enables eligible employees, as defined by the ESPP, the right to purchase the Company's common stock through payroll deductions during consecutive subscription periods at a purchase price of not less than 85% of the fair market value of a common share at the end of each offering period. Annual purchases by participants are limited to the number of whole shares that can be purchased by an amount equal to ten percent of the participant's compensation or $5,000, whichever is less. Each offering period of the ESPP lasts six months, commencing on January 1 and July 1 of each year.  The amounts collected from participants during a subscription period are used on the exercise date to purchase full shares of common stock.  Participants may withdraw from an offering before the exercise date and obtain a refund of amounts withheld through payroll deductions. Compensation cost, representing the 15% discount applied to the fair market value of common stock, is recognized on a straight-line basis over the six-month vesting period during which employees perform related services. Under the ESPP, 500,000 shares are authorized to be issued. In July 2020 and January 2021, the Company issued 30,825 and 8,928 shares of its common stock, respectively, to participants in the ESPP who contributed to the plan through the June 30, 2020 and December 31, 2020 offering periods, respectively.

On February 10, 2021 the Company entered into an underwriting agreement (“Underwriting Agreement”) with Lake Street Capital Markets, LLC (“Underwriter”) relating to an underwritten public offering (the “Offering”). On February 12, 2021 the Company sold to the Underwriter 1,783,500 shares of its Common Stock. The Underwriting Agreement provided for purchase and sale of the Shares by the company to the Underwriter at a price of $11.28 per share. The price to the public in the Offering was $12.00 per share. In addition, under the terms of the Underwriting Agreement, the Company granted the Underwriter a 30-day option to purchase up to an additional 267,525 shares of Common Stock to cover over-allotments, if any, on the same terms and conditions. The net proceeds to the Company from the Offering after deducting the underwriting discounts and commissions were approximately $19.8 million. On February 18, 2021, the Company received approximately $3.0 million of net proceeds for the sale of 267,525 shares in connection with the exercise of the over-allotment option.

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Fair Value Measurements

6 Months Ended

Jun. 30, 2021

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The Company measures the fair value of financial assets and liabilities in accordance with ASC Topic 820 – Fair Value Measurements and Disclosures, which defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC Topic 820 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value and requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to measurements involving significant unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

•Level 1 — inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that are accessible at the measurement date;

•Level 2 — inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities; and

•Level 3 — unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

The Company believes that the carrying amounts of its financial instruments, including cash and cash equivalents, trade accounts receivable and accounts payable consist primarily of instruments without extended maturities, which approximate fair value primarily due to their short-term maturities and low risk of counterparty default. We also believe that the carrying value of the 2019 Refinancing Agreement term loan and 2021 Wintrust Term Loan approximates its fair values due to the variable rate on such debt. As of February 24, 2021 and December 31, 2020, the Company determined that the fair value of its 2019 Revolving Agreement term loan was $39.0 million. As of June 30, 2021, the Company determined that the fair value of its 2021 Wintrust Term Loan was $28.0 million. There were no outstanding borrowings on the Company's 2019 ABL Credit Agreement revolver at February 24, 2021 and December 31, 2020. Such fair values were determined using discounted estimated future cash flows using level 3 inputs.

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Earnings per Share

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Earnings per Share

Earnings per Share

Diluted EPS assumes the dilutive effect of outstanding common stock warrants and RSUs using the treasury stock method.

	Three months ended June 30,				Six months ended June 30,
(in thousands, except per share amounts)	2021		2020		2021		2020
EPS numerator:
Net income (loss)	$	732	$	2,947	$	(1,550)	$	2,895
EPS denominator:
Weighted average shares outstanding – basic	10,252		7,846		9,738		7,822
Impact of dilutive securities	217		59		—		56
Weighted average shares outstanding – diluted	10,469		7,905		9,738		7,878
EPS:
Basic	$	0.07	$	0.38	$	(0.16)	$	0.37
Diluted	$	0.07	$	0.37	$	(0.16)	$	0.37

The following table summarizes the securities that were antidilutive or out-of-the-money, and therefore, were not included in the computations of diluted loss per common share:

	Three months ended June 30,		Six months ended June 30,
	2021	2020	2021	2020
In-the-money warrants	—	—	—	—
Out-of-the-money warrants (see Note 8)	4,403,930	4,576,799	4,403,930	4,576,799
Service-based RSUs (See Note 17)	334	463	142,120	1,255
Performance and market-based RSUs(1)	13,929	9,674	79,971	—
Employee Stock Purchase Plan	—	—	4,778	—
Total	4,418,193	4,586,936	4,630,799	4,578,054

(1) For the three and six months ended June 30, 2021 and 2020, certain PRSU and MRSU awards were not included in the computation of diluted loss per share because the performance and market conditions were not satisfied during the periods and would not be satisfied if the reporting date was at the end of the contingency period.

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Income Taxes

6 Months Ended

Jun. 30, 2021

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company is taxed as a C corporation.

For interim periods, the provision for income taxes (including federal, state, local and foreign taxes) is calculated based on the estimated annual effective tax rate, adjusted for certain discrete items for the full fiscal year. Cumulative adjustments to the Company's estimate are recorded in the interim period in which a change in the estimated annual effective rate is determined.

Each quarter we update our estimate of the annual effective tax rate, and if our estimated tax rate changes, we make a cumulative adjustment.

The Company had an effective tax rate of 26.5% and an effective tax benefit rate of 33.2% for the three and six months ended June 30, 2021, respectively. For the three and six months ended June 30, 2020, the Company had an income tax rate of 27.4% and 14.1%, respectively.

No valuation allowance was required as of June 30, 2021 or December 31, 2020.

The Company had previously recorded a liability for unrecognized tax benefits (“UTB”) related to tax positions taken on its various income tax returns in open tax periods. If recognized, a portion of unrecognized tax benefits would favorably impact the effective tax rate that is reported in future periods. The Company filed to change an improper tax method of accounting in the fourth quarter of 2020 related to the UTB that affords the Company IRS audit protection in past periods. Therefore, the total unrecognized tax benefits were reduced in the fourth quarter of 2020.

The following is a reconciliation of the beginning and ending unrecognized tax benefits:

	June 30, 2021		December 31, 2020
Balance at beginning of period	$	—	$	1,130
Gross increases in prior period tax positions	—		—
Gross increases in current period tax positions	—		—
Decreases related to prior year tax positions	—		(1,130)
Balance at end of period	$	—	$	—

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Operating Segments

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Operating Segments

Operating Segments

The Company determined its operating segments on the same basis that it assesses performance and makes operating decisions. The Company manages and measures the performance of its business in two distinct operating segments. As of January 1, 2021, the Company renamed its existing two reportable segments to reflect its two distinct approaches to our customer base and to better align with our owner direct strategy. The previously named Construction Segment is now known as General Contractor Relationships (“GCR”); the previously named Service Segment is now known as Owner Direct Relationships (“ODR”). These segments are reflective of how the Company’s Chief Operating Decision Maker (“CODM”) reviews operating results for the purposes of allocating resources and assessing performance. The Company's CODM is comprised of its Chief Executive Officer, Chief Financial Officer and Chief Operating Officer.

The accounting policies of the segments are the same as those described in the summary of significant accounting policies. The CODM evaluates performance based on income from operations of the respective segments after the allocation of corporate office operating expenses. In accordance with ASC Topic 280 – Segment Reporting, the Company has elected to aggregate all of the construction activity into one GCR reportable segment and all of the service branches into one ODR reportable segment. All transactions between segments are eliminated in consolidation. Our corporate department provides general and administrative support services to our two operating segments. The CODM allocates costs between segments for selling, general and administrative and depreciation expense.

All of the Company’s identifiable assets are located in the United States, which is where the Company is domiciled. Interest expense is not allocated to segments because of the corporate management of debt service including interest.

Condensed consolidated segment information for the three months ended June 30, 2021 and 2020 is as follows:

	Three months ended June 30,
(in thousands)	2021		2020
Statement of Operations Data:
Revenue:
GCR	$	87,550	$	105,937
ODR	33,469		29,248
Total revenue	121,019		135,185
Gross profit:
GCR	8,885		12,213
ODR	9,805		8,122
Total gross profit	18,690		20,335
Selling, general and administrative:
GCR	9,070		8,024
ODR	7,526		5,588
Corporate	636		140
Total selling, general and administrative	17,232		13,752
Amortization of intangibles	104		274
Operating income	$	1,354	$	6,309
Operating income for reportable segments	$	1,354	$	6,309
Less unallocated amounts:
Interest expense, net	(452)		(2,137)
Gain (loss) on disposition of property and equipment	94		(13)
Loss on change in fair value of warrant liability	—		(102)
Total unallocated amounts	(358)		(2,252)
Income before income taxes	$	996	$	4,057
Other Data:
Depreciation and amortization:
GCR	$	1,020	$	1,032
ODR	345		330
Corporate	104		274
Total other data	$	1,469	$	1,636

Summarized segment information is as follows:

	Three months ended June 30, 2021						Three months ended June 30, 2020
(in thousands)	GCR		ODR		Total		GCR		ODR		Total
Revenue	$	87,550	$	33,469	$	121,019	$	105,937	$	29,248	$	135,185
Gross Profit	8,885		9,805		18,690		12,213		8,122		20,335
Selling, general and administrative	9,070		7,526		16,596		8,024		5,588		13,612
EBIT	$	(185)	$	2,279	$	2,094	$	4,189	$	2,534	$	6,723

Reconciliation of segment gross profit to income before income taxes:

	Three months ended June 30,
(in thousands)	2021		2020
Total gross profit from reportable segments	$	18,690	$	20,335
Selling, general and administrative	(17,232)		(13,752)
Amortization of intangibles	(104)		(274)
Total other expenses	(358)		(2,252)
Income before income taxes	$	996	$	4,057

Condensed consolidated segment information for the six months ended June 30, 2021 and 2020 is as follows:

	Six months ended June 30,
(in thousands)	2021		2020
Statement of Operations Data:
Revenue:
GCR	$	172,354	$	215,423
ODR	62,009		58,534
Total revenue	234,363		273,957
Gross profit:
GCR	18,280		23,195
ODR	17,639		15,364
Total gross profit	35,919		38,559
Selling, general and administrative:
GCR	18,184		18,200
ODR	14,880		11,917
Corporate	1,313		435
Total selling, general and administrative	34,377		30,552
Amortization of intangibles	208		417
Operating income	$	1,334	$	7,590
Operating income for reportable segments	$	1,334	$	7,590
Less unallocated amounts:
Interest expense, net	(1,716)		(4,295)
Gain on disposition of property and equipment	8		17
Loss on early debt extinguishment	(1,961)		—
Gain on change in fair value of warrant liability	14		59
Total unallocated amounts	(3,655)		(4,219)
(Loss) income before income taxes	$	(2,321)	$	3,371
Other Data:
Depreciation and amortization:
GCR	$	2,056	$	2,062
ODR	700		661
Corporate	208		417
Total other data	$	2,964	$	3,140

Summarized segment information is as follows:

	Six months ended June 30, 2021						Six months ended June 30, 2020
(in thousands)	GCR		ODR		Total		GCR		ODR		Total
Revenue	$	172,354	$	62,009	$	234,363	$	215,423	$	58,534	$	273,957
Gross Profit	18,280		17,639		35,919		23,195		15,364		38,559
Selling, general and administrative	18,184		14,880		33,064		18,200		11,917		30,117
EBIT	$	96	$	2,759	$	2,855	$	4,995	$	3,447	$	8,442

Reconciliation of segment gross profit to (loss) income before income taxes:

	Six months ended June 30,
(in thousands)	2021		2020
Total gross profit from reportable segments	$	35,919	$	38,559
Selling, general and administrative	(34,377)		(30,552)
Amortization of intangibles	(208)		(417)
Total other expenses	(3,655)		(4,219)
(Loss) income before income taxes	$	(2,321)	$	3,371

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Leases

6 Months Ended

Jun. 30, 2021

Leases [Abstract]

Leases

Leases

The Company leases real estate, trucks and other equipment. The determination of whether an arrangement is, or contains, a lease is performed at the inception of the arrangement. Classification and initial measurement of the right-of-use asset and lease liability are determined at the lease commencement date. The Company elected the short-term lease measurement and recognition exemption; therefore, leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheets.

The Company's arrangements include certain non-lease components such as common area and other maintenance for leased real estate, as well as mileage, fuel and maintenance costs related to leased vehicles. For all leased asset classes, the Company has elected to not separate non-lease components from lease components and will account for each separate lease component and non-lease component associated with the lease as a single lease component. The Company does not guarantee any residual value in its lease agreements, and there are no material restrictions or covenants imposed by lease arrangements. Real estate leases typically include one or more options to extend the lease. The Company regularly evaluates the renewal options, and when they are reasonably certain of exercise, the Company includes the renewal period in its lease term. For our leased vehicles, the Company uses the interest rate implicit in its leases with the lessor to discount lease payments at the lease commencement date. When the implicit rate is not readily available, as is the case with our real estate leases, the Company uses quoted borrowing rates on our secured debt.

The following table summarizes the lease amounts included in our condensed consolidated balance sheets:

(in thousands)	Classification on the Condensed Consolidated Balance Sheets	June 30, 2021		December 31, 2020
Assets
Operating	Operating lease right-of-use assets (a)	$	16,852	$	18,751
Finance	Property and equipment, net (b)	5,251		6,242
Total lease assets		$	22,103	$	24,993
Liabilities
Current
Operating	Current operating lease liabilities	$	4,122	$	3,929
Finance	Current portion of long-term debt	2,454		2,536
Noncurrent
Operating	Long-term operating lease liabilities	13,454		15,459
Finance	Long-term debt	3,022		3,923
Total lease liabilities		$	23,052	$	25,847

(a) Operating lease assets are recorded net of accumulated amortization of $13.9 million at June 30, 2021 and $11.9 million at December 31, 2020.

(b) Finance lease assets are recorded net of accumulated amortization of $5.6 million at June 30, 2021 and $5.3 million at December 31, 2020.

The following table summarizes the lease costs included in our condensed consolidated statements of operations for the three and six months ended June 30, 2021 and 2020:

		Three months ended June 30,				Six months ended June 30,
(in thousands)	Classification on the Condensed Consolidated Statement of Operations	2021		2020		2021		2020
Operating lease cost	Cost of revenue(a)	$	685	$	893	$	1,375	$	1,777
Operating lease cost	Selling, general and administrative(a)	584		376		1,169		757
Finance lease cost
Amortization	Cost of revenue(b)	652		645		1,327		1,311
Interest	Interest expense, net(b)	78		86		164		179
Total lease cost		$	1,999	$	2,000	$	4,035	$	4,024

(a)    Operating lease costs recorded in cost of sales includes $0.1 million and $0.2 million of variable lease costs for the three and six months ended June 30, 2021, respectively, and $0.1 million and $0.4 million for the three and six months ended June 30, 2020, respectively. In addition, $0.1 million and $0.2 million of variable leases costs are included in Selling, general and administrative for the three and six months ended June 30, 2021, respectively, and $0.1 million for both the three and six months ended June 30, 2020. These variable costs consist of our proportionate share of operating expenses, real estate taxes and utilities.

(b)     Finance lease costs recorded in cost of revenue include variable lease costs of $0.7 million and $1.3 million for the three and six months ended June 30, 2021, respectively, and $0.5 million and $1.2 million for the three and six months ended June 30, 2020, respectively. These variable lease costs consist of fuel, maintenance, and sales tax charges. No variable lease costs for finance leases were recorded in selling, general and administrative.

Future minimum commitments for finance and operating leases that have non-cancelable lease terms in excess of one year as of June 30, 2021 were as follows:

Year ending (in thousands):	Finance Leases		Operating Leases
Remainder of 2021	$	1,401	$	2,479
2022	2,404		4,616
2023	1,409		3,516
2024	598		2,917
2025	50		2,409
Thereafter	—		4,043
Total minimum lease payments	$	5,862	$	19,980
Amounts representing interest	(386)
Present value of net minimum lease payments	$	5,476

The following is a summary of the lease terms and discount rates:

	June 30, 2021		December 31, 2020
Weighted average lease term (in years):
Operating	5.15		5.48
Finance	2.49		2.78
Weighted average discount rate:
Operating	4.84	%	4.83	%
Finance	5.45	%	5.50	%

The following is a summary of other information and supplemental cash flow information related to finance and operating leases:

	Six months ended June 30,
(in thousands)	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	2,456	$	2,910
Operating cash flows from finance leases	164		179
Financing cash flows from finance leases	1,318		1,285
Right-of-use assets exchanged for lease liabilities:
Operating leases	$	156	$	—
Finance leases	336		1,050
Right-of-use assets disposed or adjusted modifying operating leases liabilities	$	36	$	586
Right-of-use assets disposed or adjusted modifying finance leases liabilities	$	—	$	(64)

Leases

Leases

The Company leases real estate, trucks and other equipment. The determination of whether an arrangement is, or contains, a lease is performed at the inception of the arrangement. Classification and initial measurement of the right-of-use asset and lease liability are determined at the lease commencement date. The Company elected the short-term lease measurement and recognition exemption; therefore, leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheets.

The Company's arrangements include certain non-lease components such as common area and other maintenance for leased real estate, as well as mileage, fuel and maintenance costs related to leased vehicles. For all leased asset classes, the Company has elected to not separate non-lease components from lease components and will account for each separate lease component and non-lease component associated with the lease as a single lease component. The Company does not guarantee any residual value in its lease agreements, and there are no material restrictions or covenants imposed by lease arrangements. Real estate leases typically include one or more options to extend the lease. The Company regularly evaluates the renewal options, and when they are reasonably certain of exercise, the Company includes the renewal period in its lease term. For our leased vehicles, the Company uses the interest rate implicit in its leases with the lessor to discount lease payments at the lease commencement date. When the implicit rate is not readily available, as is the case with our real estate leases, the Company uses quoted borrowing rates on our secured debt.

The following table summarizes the lease amounts included in our condensed consolidated balance sheets:

(in thousands)	Classification on the Condensed Consolidated Balance Sheets	June 30, 2021		December 31, 2020
Assets
Operating	Operating lease right-of-use assets (a)	$	16,852	$	18,751
Finance	Property and equipment, net (b)	5,251		6,242
Total lease assets		$	22,103	$	24,993
Liabilities
Current
Operating	Current operating lease liabilities	$	4,122	$	3,929
Finance	Current portion of long-term debt	2,454		2,536
Noncurrent
Operating	Long-term operating lease liabilities	13,454		15,459
Finance	Long-term debt	3,022		3,923
Total lease liabilities		$	23,052	$	25,847

(a) Operating lease assets are recorded net of accumulated amortization of $13.9 million at June 30, 2021 and $11.9 million at December 31, 2020.

(b) Finance lease assets are recorded net of accumulated amortization of $5.6 million at June 30, 2021 and $5.3 million at December 31, 2020.

The following table summarizes the lease costs included in our condensed consolidated statements of operations for the three and six months ended June 30, 2021 and 2020:

		Three months ended June 30,				Six months ended June 30,
(in thousands)	Classification on the Condensed Consolidated Statement of Operations	2021		2020		2021		2020
Operating lease cost	Cost of revenue(a)	$	685	$	893	$	1,375	$	1,777
Operating lease cost	Selling, general and administrative(a)	584		376		1,169		757
Finance lease cost
Amortization	Cost of revenue(b)	652		645		1,327		1,311
Interest	Interest expense, net(b)	78		86		164		179
Total lease cost		$	1,999	$	2,000	$	4,035	$	4,024

(a)    Operating lease costs recorded in cost of sales includes $0.1 million and $0.2 million of variable lease costs for the three and six months ended June 30, 2021, respectively, and $0.1 million and $0.4 million for the three and six months ended June 30, 2020, respectively. In addition, $0.1 million and $0.2 million of variable leases costs are included in Selling, general and administrative for the three and six months ended June 30, 2021, respectively, and $0.1 million for both the three and six months ended June 30, 2020. These variable costs consist of our proportionate share of operating expenses, real estate taxes and utilities.

(b)     Finance lease costs recorded in cost of revenue include variable lease costs of $0.7 million and $1.3 million for the three and six months ended June 30, 2021, respectively, and $0.5 million and $1.2 million for the three and six months ended June 30, 2020, respectively. These variable lease costs consist of fuel, maintenance, and sales tax charges. No variable lease costs for finance leases were recorded in selling, general and administrative.

Future minimum commitments for finance and operating leases that have non-cancelable lease terms in excess of one year as of June 30, 2021 were as follows:

Year ending (in thousands):	Finance Leases		Operating Leases
Remainder of 2021	$	1,401	$	2,479
2022	2,404		4,616
2023	1,409		3,516
2024	598		2,917
2025	50		2,409
Thereafter	—		4,043
Total minimum lease payments	$	5,862	$	19,980
Amounts representing interest	(386)
Present value of net minimum lease payments	$	5,476

The following is a summary of the lease terms and discount rates:

	June 30, 2021		December 31, 2020
Weighted average lease term (in years):
Operating	5.15		5.48
Finance	2.49		2.78
Weighted average discount rate:
Operating	4.84	%	4.83	%
Finance	5.45	%	5.50	%

The following is a summary of other information and supplemental cash flow information related to finance and operating leases:

	Six months ended June 30,
(in thousands)	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	2,456	$	2,910
Operating cash flows from finance leases	164		179
Financing cash flows from finance leases	1,318		1,285
Right-of-use assets exchanged for lease liabilities:
Operating leases	$	156	$	—
Finance leases	336		1,050
Right-of-use assets disposed or adjusted modifying operating leases liabilities	$	36	$	586
Right-of-use assets disposed or adjusted modifying finance leases liabilities	$	—	$	(64)

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Self-Insurance

6 Months Ended

Jun. 30, 2021

Insurance [Abstract]

Self-Insurance

Self-Insurance

The Company purchases workers’ compensation and general liability insurance under policies with per-incident deductibles of $250 thousand and a $4.4 million maximum aggregate deductible loss limit per year.

The components of the self-insurance liability as of June 30, 2021 and December 31, 2020 are as follows:

(in thousands)	June 30, 2021		December 31, 2020
Current liability — workers’ compensation and general liability	$	105	$	197
Current liability — medical and dental	511		764
Non-current liability	776		890
Total liability shown in Accrued expenses and other current liabilities	$	1,392	$	1,851
Restricted cash	$	113	$	113

The restricted cash balance represents an imprest cash balance set aside for the funding of workers' compensation and general liability insurance claims. This amount is replenished either when depleted or at the beginning of each month.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Legal. The Company is continually engaged in administrative proceedings, arbitrations, and litigation with owners, general contractors, suppliers, and other unrelated parties, all arising in the ordinary courses of business. In the opinion of the Company’s management, the results of these actions will not have a material adverse effect on the financial position, results of operations, or cash flows of the Company.

On November 13, 2019, claimant, Lanzo Trenchless Technologies, Inc. - North, filed a Demand for Arbitration in the state of Michigan against the Company's wholly-owned subsidiary, Limbach Company LLC. The demand seeks damages in excess of $0.4 million based upon the allegation that Limbach breached a construction contract by improperly terminating Lanzo’s subcontract, and for withholding payment from Lanzo based upon deficient performance. Limbach has asserted a counterclaim seeking damages caused by Lanzo’s deficient performance. Lanzo has recently abandoned its claims and the parties are attempting to negotiate a consent judgement in Limbach's favor that will result in the matter being concluded.

On January 23, 2020, plaintiff, Bernards Bros. Inc., filed a complaint against Limbach Holdings, Inc. in Superior Court of the State of California for the County of Los Angeles against Limbach Holdings, Inc. The complaint alleges that our Southern California operations refused to honor a proposal made to Bernards to act as a subcontractor on a construction project, and that, as a result of the wrongful failure to honor the proposal, Bernards suffered damages in excess of $3.0 million, including alleged increased costs for hiring a different subcontractor to perform the work. The Company is vigorously defending the suit. A non-binding mediation is scheduled for August 19, 2021 and trial is currently expected to take place in February 2022.

On April 17, 2020, plaintiff, LA Excavating, Inc., filed a complaint against our wholly-owned subsidiary, Limbach Company LP, and several other parties, in Superior Court of the State of California, for the County of Los Angeles. The complaint seeks damages of approximately $1.0 million for alleged failure to pay contract balances and extra work ordered by Limbach, as well as seeks to enforce payment obligations under payment and stop notice release bonds. The Company disputes the allegations and intends to vigorously defend the suit, which is currently set for trial in November of 2021.

In July of 2020, plaintiff, Kimball Construction Co., Inc., filed a complaint against our wholly-owned subsidiary, Limbach Company LLC in circuit Court for Montgomery County, Maryland. The complaint seeks damages of approximately $1.7 million for alleged failure to pay contract balances and extra work, as well as to enforce payment obligations under a payment bond issued by Limbach's surety provider. The Company and Kimball have reached a cooperative resolution of these claims, which resulted in a Stipulation of Dismissal of the suit on or about June 21, 2021.

Surety. The terms of our construction contracts frequently require that we obtain from surety companies, and provide to our customers, payment and performance bonds (“Surety Bonds”) as a condition to the award of such contracts. The Surety Bonds secure our payment and performance obligations under such contracts, and we have agreed to indemnify the surety companies for amounts, if any, paid by them in respect of Surety Bonds issued on our behalf. In addition, at the request of labor unions representing certain of our employees, Surety Bonds are sometimes provided to secure obligations for wages and benefits payable to or for such employees. Public sector contracts require Surety Bonds more frequently than private sector contracts, and accordingly, our bonding requirements typically increase as the amount of public sector work increases. As of June 30, 2021, the Company had approximately $265.3 million in surety bonds outstanding. The Surety Bonds are issued by surety companies in return for premiums, which vary depending on the size and type of bond.

Collective Bargaining Agreements. Many of the Company’s craft labor employees are covered by collective bargaining agreements. The agreements require the Company to pay specified wages, provide certain benefits and contribute certain amounts to multi-employer pension plans. If the Company withdraws from any of the multi-employer pension plans or if the plans were to otherwise become underfunded, the Company could incur additional liabilities related to these plans. Although the Company has been informed that some of the multi-employer pension plans to which it contributes have been classified as “critical” status, the Company is not currently aware of any significant liabilities related to this issue.

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Remaining Performance Obligations

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Remaining Performance Obligations

Contract Assets and Liabilities

The Company classifies contract assets and liabilities that may be settled beyond one year from the balance sheet date as current, consistent with the length of time of the Company’s project operating cycle.

Contract assets include costs in excess of billings and estimated earnings and amounts due under retainage provisions. The components of the contract asset balances as of the respective dates were as follows:

(in thousands)	June 30, 2021		December 31, 2020		Change
Contract assets
Costs in excess of billings and estimated earnings	$	38,200	$	31,894	$	6,306
Retainage receivable	32,615		35,204		(2,589)
Total contract assets	$	70,815	$	67,098	$	3,717

Retainage receivable represents amounts invoiced to customers where payments have been partially withheld, typically 10%, pending the completion of certain milestones, satisfaction of other contractual conditions or the completion of the project. Retainage agreements vary from project to project and balances could be outstanding for several months or years depending on a number of circumstances such as contract-specific terms, project performance and other variables that may arise as the Company makes progress towards completion.

Contract assets represent the excess of contract costs and profits (or contract revenue) over the amount of contract billings to date and are classified as a current asset. Contract assets result when either: 1) the appropriate contract revenue amount has been recognized over time in accordance with ASC Topic 606, but a portion of the revenue recorded cannot be currently billed due to the billing terms defined in the contract, or 2) costs are incurred related to certain claims and unapproved change orders. Claims occur when there is a dispute regarding both a change in the scope of work and the price associated with that change. Unapproved change orders occur when a change in the scope of work results in additional work being performed before the parties have agreed on the corresponding change in the contract price. The Company routinely estimates recovery related to claims and unapproved change orders as a form of variable consideration at the most likely amount it expects to receive and to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Claims and unapproved change orders are billable upon the agreement and resolution between the contractual parties and after the execution of contractual amendments. Increases in claims and unapproved change orders typically result from costs being incurred against existing or new positions; decreases normally result from resolutions and subsequent billings.

The current estimated net realizable value on such claims and unapproved change orders as recorded in contract assets and contract liabilities in the condensed consolidated balance sheets was $40.1 million and $33.6 million as of June 30, 2021 and December 31, 2020, respectively. The Company anticipates that the majority of such amounts will be approved or executed within one year. The resolution of these claims and unapproved change orders may require litigation or other forms of dispute resolution proceedings.

Contract liabilities include billings in excess of costs and estimated earnings and provisions for losses. The components of the contract liability balances as of the respective dates were as follows:

(in thousands)	June 30, 2021		December 31, 2020		Change
Contract liabilities
Billings in excess of costs and estimated earnings	$	38,611	$	46,020	$	(7,409)
Provisions for losses	568		628		(60)
Total contract liabilities	$	39,179	$	46,648	$	(7,469)

Billings in excess of costs and estimated earnings represent the excess of contract billings to date over the amount of contract costs and profits (or contract revenue) recognized to date. The balance may fluctuate depending on the timing of contract billings and the recognition of contract revenue.

Provisions for losses are recognized in the condensed consolidated statements of operations at the uncompleted performance obligation level for the amount of total estimated losses in the period that evidence indicates that the estimated total cost of a performance obligation exceeds its estimated total revenue.

The net overbilling position for contracts in process consist of the following:

(in thousands)	June 30, 2021		December 31, 2020
Revenue earned on uncompleted contracts	$	691,473	$	752,564
Less: Billings to date	(691,884)		(766,690)
Net overbilling	$	(411)	$	(14,126)
(in thousands)	June 30, 2021		December 31, 2020
Costs in excess of billings and estimated earnings	$	38,200	$	31,894
Billings in excess of costs and estimated earnings	(38,611)		(46,020)
Net overbilling	$	(411)	$	(14,126)

For the three and six months ended June 30, 2021 and 2020, we recorded revisions in our contract estimates for certain GCR and ODR projects.

For the three months ended June 30, 2021 and 2020, total net gross profit write-downs were $1.1 million and $2.0 million, respectively. For projects having a material gross profit impact of $0.25 million or more for the three months ended June 30, 2021, this resulted in material gross profit write downs on three GCR segment projects of $1.7 million and one ODR project for $0.3 million. Of the material GCR segment write downs, one project was within the Michigan region for a total of $1.0 million, one project was within the New England region for $0.3 million and one project was within the Southern California region for $0.4 million. Of the material ODR segment write downs, one project was within the Eastern Pennsylvania region for $0.3 million. We also recorded material gross profit write ups of $0.3 million on one GCR segment project in the Florida region and $0.3 million on one ODR segment project in the Michigan region. For the three months ended June 30, 2020, we recorded material revisions in our contract estimates on four GCR projects which resulted in gross profit write downs of $1.5 million. Two of these projects were within the Southern California region for a total of $0.7 million. No project revisions resulting in material gross profit write ups were recorded during the three months ended June 30, 2020.

For the six months ended June 30, 2021 and 2020, total net gross profit write-downs were $1.7 million and $3.4 million, respectively. For projects having a material gross profit impact of $0.25 million or more, we recorded gross profit write downs on eight GCR segment projects of $3.5 million and one ODR project for $0.3 million. Of the material GCR segment write downs, two projects were within the Michigan region for a total of $1.2 million, two projects were within the Eastern Pennsylvania region for $1.0 million, two projects were within the Southern California region for $0.8 million, one project was within the New England region for $0.3 million, and one project was within the Mid-Atlantic region for $0.3 million. We also materially wrote down one ODR segment project within the Eastern Pennsylvania region for $0.3 million. We also recorded material GCR segment gross profit write ups of $0.9 million on one GCR segment project in the Michigan region for $0.5 million and one project within the Ohio region for $0.4 million. For the six months ended June 30, 2020, we recorded material gross profit write downs on eight GCR projects and two gross profit write ups on GCR projects, for an aggregate revision of $5.2 million and $1.2 million, respectively.

Remaining Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and exclude unexercised contract options. The Company’s remaining performance obligations includes projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions.

As of June 30, 2021, the aggregate amount of the transaction prices allocated to the remaining performance obligations of the Company's GCR and ODR segment contracts were $378.9 million and $44.2 million, respectively. As of December 31, 2020, the aggregate amount of the transaction prices allocated to the remaining performance obligations of the Company's GCR and ODR segment contracts were $393.5 million and $35.7 million, respectively.

We estimate that 44% and 62% of our GCR and ODR segment remaining performance obligations as of June 30, 2021, respectively, will be recognized as revenue during 2021, with the substantial majority of remaining performance obligations to be recognized within 24 months, although the timing of the Company's performance is not always under its control.

Additionally, the difference between remaining performance obligations and backlog is due to the exclusion of a portion of the Company’s ODR agreements under certain contract types from the Company’s remaining performance obligations as these contracts can be canceled for convenience at any time by the Company or the customer without considerable cost incurred by the customer. Additional information related to backlog is provided in “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this Quarterly Report on Form 10-Q.

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Management Incentive Plans

6 Months Ended

Jun. 30, 2021

Share-based Payment Arrangement [Abstract]

Management Incentive Plans

Management Incentive Plans

The Company initially adopted the Omnibus Incentive Plan on July 20, 2016 for the purpose of: (a) encouraging the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company’s objectives; (b) giving participants an incentive for excellence in individual performance; (c) promoting teamwork among participants; and (d) giving the Company a significant advantage in attracting and retaining key employees, directors and consultants. To accomplish such purposes, the Omnibus Incentive Plan provides that the Company may grant options, stock appreciation rights, restricted shares, restricted stock units, performance-based awards (including performance-based restricted shares and restricted stock units), other share based awards, other cash-based awards or any combination of the foregoing.

Following the further amendment and restatement of the Omnibus Incentive Plan upon approval of the Company's stockholders on June 16, 2021, the Company has reserved a total of 2,250,000 shares of its common stock for issuance under the Omnibus Incentive Plan. The number of shares issued or reserved pursuant to the Omnibus Incentive Plan will be adjusted by the plan administrator, as they deem appropriate and equitable, as a result of stock splits, stock dividends, and similar changes in the Company’s common stock. In connection with the grant of an award, the plan administrator may provide for the treatment of such award in the event of a change in control. All awards are made in the form of shares only.

Service-Based Awards

During the first six months of 2021, the Company granted 120,899 service-based RSUs to its executives, certain employees, and non-employee directors under the Omnibus Incentive Plan.

The following table summarizes our service-based RSU activity for the six months ended June 30, 2021:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020	285,799	$	6.32
Granted	120,899	12.25
Vested	(106,383)	6.66
Forfeited	(2,333)	8.27
Unvested at June 30, 2021	297,982	$	8.59

Performance-Based Awards

During the first six months of 2021, the Company granted 185,367 performance-based RSUs (“PRSUs”) to its executives and certain employees under the Omnibus Incentive Plan. The Company will recognize stock-based compensation expense for these awards over the vesting period based on the projected probability of achievement of certain performance conditions as of the end of each reporting period during the performance period and may periodically adjust the recognition of such expense, as necessary, in response to any changes in the Company’s forecasts with respect to the performance conditions. For the three and six months ended June 30, 2021, the Company recognized $0.2 million and $0.4 million, respectively, of stock-based compensation expense related to outstanding PRSUs. For the three and six months ended June 30, 2020, the Company recognized $0.1 million of stock-based compensation expense related to outstanding PRSUs.

The following table summarizes our PRSU activity for the six months ended June 30, 2021:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020	99,500	$	4.23
Granted	185,367	12.26
Vested	—	—
Forfeited	(4,167)	8.92
Unvested at June 30, 2021	280,700	$	9.46

Market-Based Awards

On September 4, 2020, the Compensation Committee (the “Committee”) of the Board of Directors of the Company approved amendments to certain restricted stock units initially awarded on August 30, 2017 by the Company to certain employees. Pursuant to the amendment adopted on September 4, 2020, the measurement period was extended to July 16, 2022. In addition to the market performance-based vesting condition, the vesting of such restricted stock unit is subject to continued employment from August 1, 2017 through the later of July 31, 2019 or the date on which the Committee certifies the achievement of the performance goal. The Company has accounted for this amendment as a Type I modification and will recognize approximately $0.2 million of incremental stock-based compensation expense over 1.26 years based on an updated Monte Carlo simulation model.

The following table summarizes our market-based RSU (“MRSUs”) activity for the six months ended June 30, 2021:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020	102,500	$	8.26
Granted	—	—
Vested	—	—
Forfeited	—	—
Unvested at June 30, 2021	102,500	$	8.26

Total recognized stock-based compensation expense amounted to $0.7 million and $1.3 million for the three and six months ended June 30, 2021, respectively, and $0.1 million and $0.4 million for the three and six months ended June 30, 2020, respectively. The aggregate fair value as of the vest date of RSUs that vested during the six months ended June 30, 2021 and 2020 was $1.3 million and $0.6 million, respectively. Total unrecognized stock-based compensation expense related to unvested RSUs which are probable of vesting was $3.6 million at June 30, 2021. These costs are expected to be recognized over a weighted average period of 2.0 years.

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Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2021

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

Condensed Consolidated Financial Statements

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with instructions to the Quarterly Report on Form 10-Q and Rule 8-03 of Regulation S-X for smaller reporting companies. Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. Readers of this report should refer to the consolidated financial statements and the notes thereto included in our most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on March 25, 2021.

Unaudited Interim Financial Information

Unaudited Interim Financial Information

The accompanying interim Condensed Consolidated Balance Sheets, Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Stockholders’ Equity and Condensed Consolidated Statements of Cash Flows for the periods presented are unaudited. Also, within the notes to the Condensed Consolidated Financial Statements, we have included unaudited information for these interim periods. These unaudited interim Condensed Consolidated Financial Statements have been prepared in accordance with GAAP. In our opinion, the accompanying unaudited Condensed Consolidated Financial Statements contain all normal and recurring adjustments necessary for a fair statement of the Company’s financial position as of June 30, 2021, its results of operations and its cash flows for the three and six months ended June 30, 2021. The results for the three and six months ended June 30, 2021 are not necessarily indicative of the results to be expected for the year ending December 31, 2021.

The Condensed Consolidated Balance Sheet as of December 31, 2020 was derived from our audited financial statements included in our Annual Report on Form 10-K filed with the SEC on March 25, 2021, but is presented as condensed and does not contain all of the footnote disclosures from the annual financial statements.

Recently Adopted Accounting Standards and Recent Accounting Pronouncements

Recently Adopted Accounting Standards

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), which affects general principles within Topic 740, and is meant to simplify and reduce the cost of accounting for income taxes. It removes certain exceptions to the general principles in Topic 740 and simplifies areas including franchise taxes that are partially based on income, transactions with a government that result in a step up in the tax basis of goodwill, the incremental approach for intraperiod tax allocation, interim period income tax accounting for year-to-date losses that exceed anticipated losses and enacted changes in tax laws in interim periods. The changes are effective for annual periods beginning after December 15, 2020. The adoption of this pronouncement did not have a material impact on our condensed consolidated financial statements or presentation thereof.

Also in October 2020, the FASB issued ASU 2020-10, Codification Improvements. The amendments in this update remove references to various FASB Concepts Statements, situates all disclosure guidance in the appropriate disclosure section of the Codification, and makes other improvements and technical corrections to the Codification. The amendments in Sections B and C of this amendment are effective for annual periods beginning after December 15, 2020, for public business entities, with early adoption permitted. The adoption of this pronouncement did not have a material impact on our condensed consolidated financial statements or presentation thereof.

Recent Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments, which introduced an expected credit loss methodology for the measurement and recognition of credit losses on most financial instruments, including trade receivables and off-balance sheet credit exposure. Under this guidance, an entity is required to consider a broader range of information to estimate expected credit losses, which may result in earlier recognition of losses. This ASU also requires disclosure of information regarding how a company developed its allowance, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. The guidance is effective for smaller reporting companies on January 1, 2023 with early adoption permitted. The adoption of this standard will be through a cumulative-effect adjustment to retained earnings as of the effective date. Based on our historical experience, the Company does not expect that this pronouncement will have a significant impact in its financial statements or on the estimate of the allowance for doubtful accounts.

The FASB has issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting in March 2020. This new guidance provides optional expedients for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform, on financial reporting. The risk of termination of the London Interbank Offered Rate (LIBOR), has caused regulators to undertake reference rate reform initiatives to identify alternative reference rates that are more observable or transaction based that are less susceptible to manipulation. ASU 2020-04 is effective between March 12, 2020 and December 31, 2022.

In addition, in January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope. The amendments in this update refine the scope for certain optional expedients and exceptions for contract modifications and hedge accounting to apply to derivative contracts and certain hedging relationships affected by the discounting transition. The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the impact of adopting the reference rate reform guidance (both ASU 2020-04 and ASU 2021-01) on its condensed consolidated financial statements. Management has identified that its credit agreement utilizes LIBOR as a benchmark rate. Management will continue to evaluate the impact of adopting reference rate reform as the LIBOR benchmark rate within the credit agreement is phased out.

In August 2020, the FASB issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity and amends the scope guidance for contracts in an entity's own equity. The ASU addresses how convertible instruments are accounted for in the calculation of diluted earnings per share by using the if-converted method. The guidance is effective for all entities for fiscal years beginning after March 31, 2024, albeit early adoption is permitted no earlier than fiscal years beginning after December 15, 2020. Management is currently assessing the impact of this pronouncement on its condensed consolidated financial statements.

Fair Value Measurements

The Company measures the fair value of financial assets and liabilities in accordance with ASC Topic 820 – Fair Value Measurements and Disclosures, which defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC Topic 820 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value and requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to measurements involving significant unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

•Level 1 — inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that are accessible at the measurement date;

•Level 2 — inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities; and

•Level 3 — unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

The Company believes that the carrying amounts of its financial instruments, including cash and cash equivalents, trade accounts receivable and accounts payable consist primarily of instruments without extended maturities, which approximate fair value primarily due to their short-term maturities and low risk of counterparty default. We also believe that the carrying value of the 2019 Refinancing Agreement term loan and 2021 Wintrust Term Loan approximates its fair values due to the variable rate on such debt. As of February 24, 2021 and December 31, 2020, the Company determined that the fair value of its 2019 Revolving Agreement term loan was $39.0 million. As of June 30, 2021, the Company determined that the fair value of its 2021 Wintrust Term Loan was $28.0 million. There were no outstanding borrowings on the Company's 2019 ABL Credit Agreement revolver at February 24, 2021 and December 31, 2020. Such fair values were determined using discounted estimated future cash flows using level 3 inputs.

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Accounts Receivable and Allowance for Doubtful Accounts (Tables)

6 Months Ended

Jun. 30, 2021

Receivables [Abstract]

Schedule of Components of Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable and the allowance for doubtful accounts are comprised of the following:

(in thousands)	June 30, 2021		December 31, 2020
Accounts receivable - trade	$	94,881	$	86,033
Allowance for doubtful accounts	(266)		(266)
Accounts receivable, net	$	94,615	$	85,767

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Contract Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Components of Contract Asset and Liability Balances

Contract assets include costs in excess of billings and estimated earnings and amounts due under retainage provisions. The components of the contract asset balances as of the respective dates were as follows:

(in thousands)	June 30, 2021		December 31, 2020		Change
Contract assets
Costs in excess of billings and estimated earnings	$	38,200	$	31,894	$	6,306
Retainage receivable	32,615		35,204		(2,589)
Total contract assets	$	70,815	$	67,098	$	3,717

Contract liabilities include billings in excess of costs and estimated earnings and provisions for losses. The components of the contract liability balances as of the respective dates were as follows:

(in thousands)	June 30, 2021		December 31, 2020		Change
Contract liabilities
Billings in excess of costs and estimated earnings	$	38,611	$	46,020	$	(7,409)
Provisions for losses	568		628		(60)
Total contract liabilities	$	39,179	$	46,648	$	(7,469)

Schedule of Contracts In Progress

The net overbilling position for contracts in process consist of the following:

(in thousands)	June 30, 2021		December 31, 2020
Revenue earned on uncompleted contracts	$	691,473	$	752,564
Less: Billings to date	(691,884)		(766,690)
Net overbilling	$	(411)	$	(14,126)
(in thousands)	June 30, 2021		December 31, 2020
Costs in excess of billings and estimated earnings	$	38,200	$	31,894
Billings in excess of costs and estimated earnings	(38,611)		(46,020)
Net overbilling	$	(411)	$	(14,126)

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Goodwill and Intangibles (Tables)

6 Months Ended

Jun. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets are comprised of the following:

(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
June 30, 2021(1)
Amortized intangible assets:
Customer Relationships – ODR	$	4,710	$	(3,312)	$	1,398
Favorable Leasehold Interests(2)	190		(75)		115
Total amortized intangible assets	4,900		(3,387)		1,513
Unamortized intangible assets:
Trade Name	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	14,860	$	(3,387)	$	11,473

(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
December 31, 2020(1)
Amortized intangible assets:
Customer Relationships – ODR	$	4,710	$	(3,112)	$	1,598
Favorable Leasehold Interests	530		(407)		123
Total amortized intangible assets	5,240		(3,519)		1,721
Unamortized intangible assets:
Trade Name	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	15,200	$	(3,519)	$	11,681

(1)     The Backlog-Construction intangible asset previously shown at December 31, 2020 has been fully amortized. Accordingly, its gross carrying amount of $4.8 million and corresponding accumulated amortization of $4.8 million have been removed from the table.

(2)     The gross carrying amount and accumulated amortization associated with our Favorable leasehold interests intangible asset was reduced by $0.3 million due to the lease termination of our Western Pennsylvania office associated with the intangible asset.

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Debt (Tables)

6 Months Ended

Jun. 30, 2021

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Long-term debt consists of the following obligations as of:

(in thousands)	June 30, 2021		December 31, 2020
2019 Refinancing Term Loan - term loan payable in quarterly installments of principal, (commencing in September 2020) plus interest through April 2022	$	—	$	39,000
2019 Refinancing Revolving Credit Facility	—		—
Wintrust Term Loan - term loan payable in quarterly installments of principal, (commencing in March 2021) plus interest through February 2026	28,000		—
Wintrust Revolving Loan	—		—
Finance leases – collateralized by vehicles, payable in monthly installments of principal, plus interest ranging from 4.70% to 6.45% through 2025	5,476		6,459
Total debt	33,476		45,459
Less - Current portion of long-term debt	(8,454)		(6,536)
Less - Unamortized discount and debt issuance costs	(301)		(2,410)
Long-term debt	$	24,721	$	36,513

Schedule of Additional Margin and Commitment Fees Payable

The following is a summary of the additional margin and commitment fees payable on the available Wintrust Term Loan and Wintrust Revolving Loan credit commitment:

Level	Senior Leverage Ratio	Additional Margin for Prime Rate loans		Additional Margin for Prime Revolving loans		Additional Margin for Eurodollar Term loans		Additional Margin for Eurodollar Revolving loans		Commitment Fee
I	Greater than 1.00 to 1.00	1.00	%	0.50	%	4.00	%	3.50	%	0.25	%
II	Less than or equal to 1.00 to 1.00	0.25	%	—	%	3.50	%	3.00	%	0.25	%

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Equity (Tables)

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

Schedule of Outstanding Warrants

	June 30, 2021	December 31, 2020
Public Warrants(1)(5)	2,140,219	2,300,000
Private Warrants(1)(5)	99,000	99,000
$15 Exercise Price Sponsor Warrants(2)(5)	600,000	600,000
Merger Warrants(3)(6)	629,643	631,119
Additional Merger Warrants(4)(6)	935,068	946,680
Total	4,403,930	4,576,799

(1) Exercisable for one-half of one share of common stock at an exercise price of $5.75 per half share ($11.50 per whole share)

(2) Exercisable for one share of common stock at an exercise price of $15.00 per share

(3) Exercisable for one share of common share at an exercise price of $12.50 per share

(4) Exercisable for one share of common stock at an exercise price of $11.50 per share

(5) Issued under a warrant agreement dated July 15, 2014, between Continental Stock Transfer and Trust Company, as warrant agent, and the Company

(6) Issued to the sellers of LHLLC

Subsequent to June 30, 2021, on July 20, 2021, the Public Warrants, Private Warrants, and Additional Merger Warrants expired by their terms.

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Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

	Three months ended June 30,				Six months ended June 30,
(in thousands, except per share amounts)	2021		2020		2021		2020
EPS numerator:
Net income (loss)	$	732	$	2,947	$	(1,550)	$	2,895
EPS denominator:
Weighted average shares outstanding – basic	10,252		7,846		9,738		7,822
Impact of dilutive securities	217		59		—		56
Weighted average shares outstanding – diluted	10,469		7,905		9,738		7,878
EPS:
Basic	$	0.07	$	0.38	$	(0.16)	$	0.37
Diluted	$	0.07	$	0.37	$	(0.16)	$	0.37

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table summarizes the securities that were antidilutive or out-of-the-money, and therefore, were not included in the computations of diluted loss per common share:

	Three months ended June 30,		Six months ended June 30,
	2021	2020	2021	2020
In-the-money warrants	—	—	—	—
Out-of-the-money warrants (see Note 8)	4,403,930	4,576,799	4,403,930	4,576,799
Service-based RSUs (See Note 17)	334	463	142,120	1,255
Performance and market-based RSUs(1)	13,929	9,674	79,971	—
Employee Stock Purchase Plan	—	—	4,778	—
Total	4,418,193	4,586,936	4,630,799	4,578,054

(1) For the three and six months ended June 30, 2021 and 2020, certain PRSU and MRSU awards were not included in the computation of diluted loss per share because the performance and market conditions were not satisfied during the periods and would not be satisfied if the reporting date was at the end of the contingency period.

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Income Taxes (Tables)

6 Months Ended

Jun. 30, 2021

Income Tax Disclosure [Abstract]

Schedule of Reconciliation of Unrecognized Tax Benefits

The following is a reconciliation of the beginning and ending unrecognized tax benefits:

	June 30, 2021		December 31, 2020
Balance at beginning of period	$	—	$	1,130
Gross increases in prior period tax positions	—		—
Gross increases in current period tax positions	—		—
Decreases related to prior year tax positions	—		(1,130)
Balance at end of period	$	—	$	—

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Operating Segments (Tables)

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Schedule of Condensed Consolidated Segment Information

Condensed consolidated segment information for the three months ended June 30, 2021 and 2020 is as follows:

	Three months ended June 30,
(in thousands)	2021		2020
Statement of Operations Data:
Revenue:
GCR	$	87,550	$	105,937
ODR	33,469		29,248
Total revenue	121,019		135,185
Gross profit:
GCR	8,885		12,213
ODR	9,805		8,122
Total gross profit	18,690		20,335
Selling, general and administrative:
GCR	9,070		8,024
ODR	7,526		5,588
Corporate	636		140
Total selling, general and administrative	17,232		13,752
Amortization of intangibles	104		274
Operating income	$	1,354	$	6,309
Operating income for reportable segments	$	1,354	$	6,309
Less unallocated amounts:
Interest expense, net	(452)		(2,137)
Gain (loss) on disposition of property and equipment	94		(13)
Loss on change in fair value of warrant liability	—		(102)
Total unallocated amounts	(358)		(2,252)
Income before income taxes	$	996	$	4,057
Other Data:
Depreciation and amortization:
GCR	$	1,020	$	1,032
ODR	345		330
Corporate	104		274
Total other data	$	1,469	$	1,636

Summarized segment information is as follows:

	Three months ended June 30, 2021						Three months ended June 30, 2020
(in thousands)	GCR		ODR		Total		GCR		ODR		Total
Revenue	$	87,550	$	33,469	$	121,019	$	105,937	$	29,248	$	135,185
Gross Profit	8,885		9,805		18,690		12,213		8,122		20,335
Selling, general and administrative	9,070		7,526		16,596		8,024		5,588		13,612
EBIT	$	(185)	$	2,279	$	2,094	$	4,189	$	2,534	$	6,723

Condensed consolidated segment information for the six months ended June 30, 2021 and 2020 is as follows:

	Six months ended June 30,
(in thousands)	2021		2020
Statement of Operations Data:
Revenue:
GCR	$	172,354	$	215,423
ODR	62,009		58,534
Total revenue	234,363		273,957
Gross profit:
GCR	18,280		23,195
ODR	17,639		15,364
Total gross profit	35,919		38,559
Selling, general and administrative:
GCR	18,184		18,200
ODR	14,880		11,917
Corporate	1,313		435
Total selling, general and administrative	34,377		30,552
Amortization of intangibles	208		417
Operating income	$	1,334	$	7,590
Operating income for reportable segments	$	1,334	$	7,590
Less unallocated amounts:
Interest expense, net	(1,716)		(4,295)
Gain on disposition of property and equipment	8		17
Loss on early debt extinguishment	(1,961)		—
Gain on change in fair value of warrant liability	14		59
Total unallocated amounts	(3,655)		(4,219)
(Loss) income before income taxes	$	(2,321)	$	3,371
Other Data:
Depreciation and amortization:
GCR	$	2,056	$	2,062
ODR	700		661
Corporate	208		417
Total other data	$	2,964	$	3,140

Summarized segment information is as follows:

	Six months ended June 30, 2021						Six months ended June 30, 2020
(in thousands)	GCR		ODR		Total		GCR		ODR		Total
Revenue	$	172,354	$	62,009	$	234,363	$	215,423	$	58,534	$	273,957
Gross Profit	18,280		17,639		35,919		23,195		15,364		38,559
Selling, general and administrative	18,184		14,880		33,064		18,200		11,917		30,117
EBIT	$	96	$	2,759	$	2,855	$	4,995	$	3,447	$	8,442

Schedule of Reconciliation of Segment Gross Profit to Income Before Income Taxes

Reconciliation of segment gross profit to income before income taxes:

	Three months ended June 30,
(in thousands)	2021		2020
Total gross profit from reportable segments	$	18,690	$	20,335
Selling, general and administrative	(17,232)		(13,752)
Amortization of intangibles	(104)		(274)
Total other expenses	(358)		(2,252)
Income before income taxes	$	996	$	4,057

Reconciliation of segment gross profit to (loss) income before income taxes:

	Six months ended June 30,
(in thousands)	2021		2020
Total gross profit from reportable segments	$	35,919	$	38,559
Selling, general and administrative	(34,377)		(30,552)
Amortization of intangibles	(208)		(417)
Total other expenses	(3,655)		(4,219)
(Loss) income before income taxes	$	(2,321)	$	3,371

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Leases (Tables)

6 Months Ended

Jun. 30, 2021

Leases [Abstract]

Supplemental Balance Sheets Information

The following table summarizes the lease amounts included in our condensed consolidated balance sheets:

(in thousands)	Classification on the Condensed Consolidated Balance Sheets	June 30, 2021		December 31, 2020
Assets
Operating	Operating lease right-of-use assets (a)	$	16,852	$	18,751
Finance	Property and equipment, net (b)	5,251		6,242
Total lease assets		$	22,103	$	24,993
Liabilities
Current
Operating	Current operating lease liabilities	$	4,122	$	3,929
Finance	Current portion of long-term debt	2,454		2,536
Noncurrent
Operating	Long-term operating lease liabilities	13,454		15,459
Finance	Long-term debt	3,022		3,923
Total lease liabilities		$	23,052	$	25,847

(a) Operating lease assets are recorded net of accumulated amortization of $13.9 million at June 30, 2021 and $11.9 million at December 31, 2020.

(b) Finance lease assets are recorded net of accumulated amortization of $5.6 million at June 30, 2021 and $5.3 million at December 31, 2020.

Summary of Lease Costs, Lease Terms and Discount Rates

The following table summarizes the lease costs included in our condensed consolidated statements of operations for the three and six months ended June 30, 2021 and 2020:

		Three months ended June 30,				Six months ended June 30,
(in thousands)	Classification on the Condensed Consolidated Statement of Operations	2021		2020		2021		2020
Operating lease cost	Cost of revenue(a)	$	685	$	893	$	1,375	$	1,777
Operating lease cost	Selling, general and administrative(a)	584		376		1,169		757
Finance lease cost
Amortization	Cost of revenue(b)	652		645		1,327		1,311
Interest	Interest expense, net(b)	78		86		164		179
Total lease cost		$	1,999	$	2,000	$	4,035	$	4,024

(a)    Operating lease costs recorded in cost of sales includes $0.1 million and $0.2 million of variable lease costs for the three and six months ended June 30, 2021, respectively, and $0.1 million and $0.4 million for the three and six months ended June 30, 2020, respectively. In addition, $0.1 million and $0.2 million of variable leases costs are included in Selling, general and administrative for the three and six months ended June 30, 2021, respectively, and $0.1 million for both the three and six months ended June 30, 2020. These variable costs consist of our proportionate share of operating expenses, real estate taxes and utilities.

(b)     Finance lease costs recorded in cost of revenue include variable lease costs of $0.7 million and $1.3 million for the three and six months ended June 30, 2021, respectively, and $0.5 million and $1.2 million for the three and six months ended June 30, 2020, respectively. These variable lease costs consist of fuel, maintenance, and sales tax charges. No variable lease costs for finance leases were recorded in selling, general and administrative.

The following is a summary of the lease terms and discount rates:

	June 30, 2021		December 31, 2020
Weighted average lease term (in years):
Operating	5.15		5.48
Finance	2.49		2.78
Weighted average discount rate:
Operating	4.84	%	4.83	%
Finance	5.45	%	5.50	%

Future Minimum Commitment for Finance Leases

Future minimum commitments for finance and operating leases that have non-cancelable lease terms in excess of one year as of June 30, 2021 were as follows:

Year ending (in thousands):	Finance Leases		Operating Leases
Remainder of 2021	$	1,401	$	2,479
2022	2,404		4,616
2023	1,409		3,516
2024	598		2,917
2025	50		2,409
Thereafter	—		4,043
Total minimum lease payments	$	5,862	$	19,980
Amounts representing interest	(386)
Present value of net minimum lease payments	$	5,476

Future Minimum Commitment for Operating Leases

Future minimum commitments for finance and operating leases that have non-cancelable lease terms in excess of one year as of June 30, 2021 were as follows:

Year ending (in thousands):	Finance Leases		Operating Leases
Remainder of 2021	$	1,401	$	2,479
2022	2,404		4,616
2023	1,409		3,516
2024	598		2,917
2025	50		2,409
Thereafter	—		4,043
Total minimum lease payments	$	5,862	$	19,980
Amounts representing interest	(386)
Present value of net minimum lease payments	$	5,476

Leases Supplemental Cash Flow Information

The following is a summary of other information and supplemental cash flow information related to finance and operating leases:

	Six months ended June 30,
(in thousands)	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	2,456	$	2,910
Operating cash flows from finance leases	164		179
Financing cash flows from finance leases	1,318		1,285
Right-of-use assets exchanged for lease liabilities:
Operating leases	$	156	$	—
Finance leases	336		1,050
Right-of-use assets disposed or adjusted modifying operating leases liabilities	$	36	$	586
Right-of-use assets disposed or adjusted modifying finance leases liabilities	$	—	$	(64)

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Self-Insurance (Tables)

6 Months Ended

Jun. 30, 2021

Insurance [Abstract]

Schedule of Components of Self-Insurance

The components of the self-insurance liability as of June 30, 2021 and December 31, 2020 are as follows:

(in thousands)	June 30, 2021		December 31, 2020
Current liability — workers’ compensation and general liability	$	105	$	197
Current liability — medical and dental	511		764
Non-current liability	776		890
Total liability shown in Accrued expenses and other current liabilities	$	1,392	$	1,851
Restricted cash	$	113	$	113

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Management Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2021

RSUs

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Nonvested Restricted Stock Units Activity

The following table summarizes our service-based RSU activity for the six months ended June 30, 2021:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020	285,799	$	6.32
Granted	120,899	12.25
Vested	(106,383)	6.66
Forfeited	(2,333)	8.27
Unvested at June 30, 2021	297,982	$	8.59

PRSUs

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Nonvested Restricted Stock Units Activity

The following table summarizes our PRSU activity for the six months ended June 30, 2021:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020	99,500	$	4.23
Granted	185,367	12.26
Vested	—	—
Forfeited	(4,167)	8.92
Unvested at June 30, 2021	280,700	$	9.46

MRSUs

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Nonvested Restricted Stock Units Activity

The following table summarizes our market-based RSU (“MRSUs”) activity for the six months ended June 30, 2021:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020	102,500	$	8.26
Granted	—	—
Vested	—	—
Forfeited	—	—
Unvested at June 30, 2021	102,500	$	8.26

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Organization and Plan of Business Operations (Details)	1 Months Ended	6 Months Ended	18 Months Ended
	Jul. 31, 2020	Jun. 30, 2021 approach segment	Jun. 30, 2021
Unusual or Infrequent Item, or Both [Line Items]
Number of reportable segments		2
Number distinct approaches to customer base | approach		2
Number of operating segments		2
Service period		2 years
COVID 19
Unusual or Infrequent Item, or Both [Line Items]
Salary reduction percentage	0.10		0.10
Fee reduction percentage on director compensation	0.10		0.10
COVID 19 | Minimum
Unusual or Infrequent Item, or Both [Line Items]
Suspension period of non-essential expenses			1 month
COVID 19 | Maximum
Unusual or Infrequent Item, or Both [Line Items]
Suspension period of non-essential expenses			3 months

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Accounts Receivable and Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Receivables [Abstract]
Accounts receivable - trade	$ 94,881	$ 86,033
Allowance for doubtful accounts	(266)	(266)
Accounts receivable, net	$ 94,615	$ 85,767

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Contract Assets and Liabilities - Components of Contract Asset and Liability Balances (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Contract assets
Costs in excess of billings and estimated earnings	$ 38,200		$ 31,894
Retainage receivable	32,615		35,204
Total contract assets	70,815		67,098
Change in costs in excess of billings and estimated earnings	6,306
Change in retainage receivable	(2,589)
Change in contract assets	3,717	$ (4,901)
Contract liabilities
Billings in excess of costs and estimated earnings	38,611		46,020
Provisions for losses	568		628
Total contract liabilities	39,179		$ 46,648
Change in billings in excess of costs and estimated earnings	(7,409)
Change in provisions for losses	(60)
Change in contract liabilities	$ (7,469)	$ 16,254

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Contract Assets and Liabilities - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) project	Jun. 30, 2020 USD ($) project	Jun. 30, 2021 USD ($) project	Jun. 30, 2020 USD ($) project	Dec. 31, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Percentage completed of certain milestones			10.00%
Net realizable value of unapproved orders	$ 40,100		$ 40,100		$ 33,600
Gross profit write downs	1,100	$ 2,000	1,700	$ 3,400
Revision amount for gross profit impact on contract estimates (more than)	250		250
Number of projects subject to gross profit write ups | project		0
GCR
Property, Plant and Equipment [Line Items]
Gross profit write downs	$ 1,700	$ 1,500	$ 3,500	$ 5,200
Number of projects subject to gross profit write downs | project	3	4	8	8
Gross profit write ups			$ 900	$ 1,200
Number of projects subject to gross profit write ups | project				2
GCR | Michigan Region Project
Property, Plant and Equipment [Line Items]
Gross profit write downs	$ 1,000		$ 1,200
Number of projects subject to gross profit write downs | project	1		2
Gross profit write ups			$ 500
Number of projects subject to gross profit write ups | project			1
GCR | New England Region Project
Property, Plant and Equipment [Line Items]
Gross profit write downs	$ 300		$ 300
Number of projects subject to gross profit write downs | project	1		1
GCR | Southern California Region Project
Property, Plant and Equipment [Line Items]
Gross profit write downs	$ 400	$ 700	$ 800
Number of projects subject to gross profit write downs | project	1	2	2
GCR | Eastern Pennsylvania Region Project
Property, Plant and Equipment [Line Items]
Gross profit write downs			$ 1,000
Number of projects subject to gross profit write downs | project			2
GCR | Florida Region Project
Property, Plant and Equipment [Line Items]
Gross profit write ups	$ 300
Number of projects subject to gross profit write ups | project	1
GCR | Mid-Atlantic Region Project
Property, Plant and Equipment [Line Items]
Gross profit write downs			$ 300
Number of projects subject to gross profit write downs | project			1
GCR | Ohio Region Project
Property, Plant and Equipment [Line Items]
Gross profit write ups			$ 400
Number of projects subject to gross profit write ups | project			1
ODR
Property, Plant and Equipment [Line Items]
Gross profit write downs	$ 300		$ 300
Number of projects subject to gross profit write downs | project	1		1
ODR | Michigan Region Project
Property, Plant and Equipment [Line Items]
Gross profit write ups	$ 300
Number of projects subject to gross profit write ups | project	1
ODR | Eastern Pennsylvania Region Project
Property, Plant and Equipment [Line Items]
Gross profit write downs	$ 300		$ 300
Number of projects subject to gross profit write downs | project	1		1

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Contract Assets and Liabilities - Contracts In Progress (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue earned on uncompleted contracts	$ 691,473	$ 752,564
Less: Billings to date	(691,884)	(766,690)
Net overbilling	(411)	(14,126)
Costs in excess of billings and estimated earnings	38,200	31,894
Billings in excess of costs and estimated earnings	$ (38,611)	$ (46,020)

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Goodwill and Intangibles - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 6,129,000		$ 6,129,000		$ 6,129,000
Amortization of intangibles	104,000	$ 274,000	208,000	$ 417,000
Impairment of goodwill	0	0	0	0
Impairment of intangible assets (excluding goodwill)	$ 0	$ 0	$ 0	$ 0

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Goodwill and Intangibles Assets - Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Amortized intangible assets:
Gross carrying amount	$ 4,900	$ 5,240
Accumulated amortization	(3,387)	(3,519)
Net intangible assets, excluding goodwill	1,513	1,721
Unamortized intangible assets:
Gross carrying amount	9,960	9,960
Net intangible assets, excluding goodwill	9,960	9,960
Gross carrying amount	14,860	15,200
Accumulated amortization	(3,387)	(3,519)
Total amortized and unamortized assets, excluding goodwill	11,473	11,681
Trade Name
Unamortized intangible assets:
Gross carrying amount	9,960	9,960
Net intangible assets, excluding goodwill	9,960	9,960
Customer Relationships | ODR
Amortized intangible assets:
Gross carrying amount	4,710	4,710
Accumulated amortization	(3,312)	(3,112)
Net intangible assets, excluding goodwill	1,398	1,598
Unamortized intangible assets:
Accumulated amortization	(3,312)	(3,112)
Favorable Leasehold Interests
Amortized intangible assets:
Gross carrying amount	190	530
Accumulated amortization	(75)	(407)
Net intangible assets, excluding goodwill	115	123
Unamortized intangible assets:
Accumulated amortization	(75)	(407)
Reduction in gross carrying amount and accumulated amortization of intangibles due to lease termination	$ 300
Backlog – Construction
Amortized intangible assets:
Gross carrying amount		4,800
Accumulated amortization		(4,800)
Unamortized intangible assets:
Accumulated amortization		$ (4,800)

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Debt - Schedule of Long-Term Debt (Details) - USD ($)		3 Months Ended		6 Months Ended
	Feb. 24, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Debt Instrument [Line Items]
Finance leases – collateralized by vehicles, payable in monthly installments of principal, plus interest ranging from 4.70% to 6.45% through 2025		$ 5,476,000		$ 5,476,000		$ 6,459,000
Total debt		33,476,000		33,476,000		45,459,000
Less - Current portion of long-term debt		(8,454,000)		(8,454,000)		(6,536,000)
Less - Unamortized discount and debt issuance costs		(301,000)		(301,000)		(2,410,000)
Long-term debt		24,721,000		24,721,000		36,513,000
Loss on early debt extinguishment		$ 0	$ 0	1,961,000	$ 0
Prepayment penalty and other costs associated with early debt extinguishment				$ 1,376,000	$ 0
Minimum
Debt Instrument [Line Items]
Finance lease, discount rate		4.70%		4.70%
Maximum
Debt Instrument [Line Items]
Finance lease, discount rate		6.45%		6.45%
2019 Refinancing Term Loan - term loan payable in quarterly installments of principal, (commencing in September 2020) plus interest through April 2022
Debt Instrument [Line Items]
Long term debt						39,000,000.0
2019 Refinancing Agreement
Debt Instrument [Line Items]
Loss on early debt extinguishment	$ 2,000,000.0
Write off of debt issuance and discount costs	2,600,000
Reversal or warrant liability	2,000,000.0
Prepayment penalty and other costs associated with early debt extinguishment	$ 1,400,000
Secured Debt | 2019 Refinancing Term Loan - term loan payable in quarterly installments of principal, (commencing in September 2020) plus interest through April 2022
Debt Instrument [Line Items]
Long term debt		$ 0		$ 0		39,000,000
Secured Debt | Wintrust Term Loan - term loan payable in quarterly installments of principal, (commencing in March 2021) plus interest through February 2026
Debt Instrument [Line Items]
Long term debt		28,000,000		28,000,000		0
Revolving Credit Facility | 2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Long term debt		0		0		0
Revolving Credit Facility | Wintrust Revolving Loan
Debt Instrument [Line Items]
Long term debt		$ 0		$ 0		$ 0

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Debt - 2019 Refinancing Agreement (Details)							1 Months Ended		3 Months Ended			6 Months Ended		9 Months Ended
	Jul. 01, 2021	Apr. 01, 2021	Jan. 01, 2020	Oct. 01, 2019 USD ($)	Jun. 30, 2019	Apr. 12, 2019 USD ($) covenant	Sep. 30, 2020 USD ($)	Mar. 31, 2020	Jun. 30, 2021 USD ($) shares	Sep. 30, 2020	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) shares	Jun. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)	Feb. 24, 2021 USD ($)	Dec. 31, 2020 USD ($) $ / shares shares	Nov. 30, 2019 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Gain (loss) on change in fair value of warrant liability									$ 0		$ (102,000)	$ 14,000	$ 59,000
Amortization of debt issuance costs												$ 220,000	1,080,000
2019 Refinancing Agreement
Debt Instrument [Line Items]
Debt issued						$ 40,000,000.0
Debt effective interest rate									13.00%			13.00%			13.00%
Debt installment payments							$ 1,000,000.0
Unused line fee percentage							2.00%
Make-whole premium prepayment period							19 months
Make-whole provision applicable to interest period							18 months
Number of financial covenants | covenant						2
Leverage ratio		200.00%		330.00%	425.00%			425.00%
Debt instrument, interest rate, increase (decrease)			1.00%
Warrants tem									5 years			5 years
Warrants liability									$ 0			$ 0			$ 2,000,000.0	$ 2,000,000.0		$ 900,000
Derivative liability																		$ 400,000
Gain (loss) on change in fair value of warrant liability									0		100,000	100,000	(100,000)
Debt instrument, unamortized discount															1,300,000
Debt issuance costs, net															3,900,000
Interest expense, debt									$ 0			$ 100,000
Amortization of debt issuance costs											400,000		700,000
2019 Refinancing Agreement | Subsequent Event | Forecast
Debt Instrument [Line Items]
Leverage ratio	200.00%
2019 Refinancing Agreement | Maximum
Debt Instrument [Line Items]
Leverage ratio										400.00%
2019 Refinancing Agreement | LIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable rate						11.00%
2019 Refinancing Agreement | LIBOR Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate						2.00%
2019 Refinancing Agreement | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate						10.00%
2019 Refinancing Agreement | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate						3.00%
2019 Refinancing Amendment Number One and Waiver
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 15,000,000
Unused line fee percentage														50.10%
Leverage ratio		200.00%		330.00%				425.00%
Debt instrument, interest rate, increase (decrease)														3.00%
Debt instrument, percentage of customer accounts required to approve amendment				75.00%
Debt instrument, non refundable waiver fee														$ 400,000
Debt instrument, non refundable amendment fee														$ 1,000,000
2019 Refinancing Amendment Number One and Waiver | Minimum
Debt Instrument [Line Items]
Debt instrument, liquidity of loan parties																	$ 10,000,000
2019 Refinancing Term Loan
Debt Instrument [Line Items]
Collateral coverage amount																37,900,000
Debt outstanding																39,000,000.0
Debt outstanding balance in excess of collateral coverage amount																$ 1,100,000
2019 Refinancing Term Loan - CB Warrants
Debt Instrument [Line Items]
Debt outstanding															0
Class of warrant or right, number of securities called by each warrant or right (in shares) | shares									0			0				263,314
Exercise price of warrants (in usd per share) | $ / shares																$ 7.63
Percentage of number of shares												2.00%
Interest expense, debt									$ 0			$ 100,000
Amortization of debt issuance costs											$ 100,000		$ 200,000
Refinancing Agreement 2019 First Amendment
Debt Instrument [Line Items]
Debt issuance costs, net															$ 1,400,000
Revolving Credit Facility | 2019 Refinancing Agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 25,000,000.0

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Debt - 2019 ABL Agreement (Details) - USD ($)			1 Months Ended			3 Months Ended		6 Months Ended		9 Months Ended
	Apr. 01, 2021	Oct. 01, 2019	Jul. 31, 2021	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020	Feb. 24, 2021	Dec. 31, 2020	Nov. 30, 2019
Debt Instrument [Line Items]
Amortization of debt issuance costs								$ 220,000	$ 1,080,000
2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Debt effective interest rate						5.25%		5.25%			5.25%
Leverage ratio	200.00%	330.00%		425.00%
Debt issuance costs, net												$ 900,000
Amortization of debt issuance costs						$ 0	$ 100,000	$ 100,000	$ 100,000
2019 Refinancing Revolving Credit Facility | Forecast
Debt Instrument [Line Items]
Leverage ratio			175.00%
2019 ABL Credit Amendment Number One and Waiver
Debt Instrument [Line Items]
Leverage ratio	200.00%	330.00%		425.00%
Lender's approval for acquisition, percentage										50.10%
Debt instrument, liquidity of loan parties													$ 10,000,000
Debt instrument, non refundable waiver fee										$ 7,500
Minimum | 2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Unused line fee percentage								0.25%
Maximum | 2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Unused line fee percentage								0.375%
Leverage ratio					400.00%
LIBOR Rate | 2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate								2.00%
LIBOR Rate | Minimum | 2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate								3.00%
LIBOR Rate | Maximum | 2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate								3.50%
Base Rate | 2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate								3.00%
Base Rate | Minimum | 2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate								2.00%
Base Rate | Maximum | 2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate								2.50%
Revolving Credit Facility | 2019 Refinancing Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						15,000,000.0		$ 15,000,000.0
Line of credit facility, current borrowing capacity						14,000,000.0		14,000,000.0
Line of credit facility reserved borrowing capacity						$ 1,000,000.0		$ 1,000,000.0

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Debt - Wintrust Term and Revolving Loans (Details)	Feb. 24, 2021 USD ($) covenant	Jun. 30, 2021 USD ($)
Loans
Debt Instrument [Line Items]
Aggregate amount of unfinanced capital expenditures during any fiscal year	$ 0
Limit annual percentage of unfinanced capital expenditures	50.00%
Loans | Through December 31, 2021
Debt Instrument [Line Items]
Number of financial covenants | covenant	3
Leverage ratio	225.00%
Loans | All times thereafter
Debt Instrument [Line Items]
Leverage ratio	200.00%
Loans | As of the last day of each fiscal quarter commencing with the fiscal quarter ending March 31, 2021
Debt Instrument [Line Items]
Leverage ratio	120.00%
Loans | Maximum
Debt Instrument [Line Items]
Aggregate amount of unfinanced capital expenditures during any fiscal year	$ 4,000,000.0
Wintrust Term Loan
Debt Instrument [Line Items]
Debt effective interest rate		4.25%
Letters of credit		$ 3,400,000
Wintrust Revolving Loan
Debt Instrument [Line Items]
Debt effective interest rate		3.75%
Secured Debt | Wintrust Term Loan
Debt Instrument [Line Items]
Debt issued	30,000,000.0
Debt installment payments	$ 500,000
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | LIBOR Rate
Debt Instrument [Line Items]
Step-down adjustment on basis spread on variable rate	0.50%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | LIBOR Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.25%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | LIBOR Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	4.00%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | Base Rate
Debt Instrument [Line Items]
Step-down adjustment on basis spread on variable rate	0.75%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Line of Credit | Revolving Credit Facility | Wintrust Revolving Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 25,000,000.0
Line of Credit | Revolving Credit Facility | Wintrust Revolving Loan | LIBOR Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.25%
Line of Credit | Revolving Credit Facility | Wintrust Revolving Loan | LIBOR Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
Line of Credit | Revolving Credit Facility | Wintrust Revolving Loan | Base Rate
Debt Instrument [Line Items]
Step-down adjustment on basis spread on variable rate	0.50%
Line of Credit | Revolving Credit Facility | Wintrust Revolving Loan | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
Line of Credit | Revolving Credit Facility | Wintrust Revolving Loan | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Line of Credit | Sublimit for Letters of Credit | Wintrust Revolving Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 5,000,000.0

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Debt - Additional Margin and Commitment Fees Payable (Details)	6 Months Ended
	Jun. 30, 2021
Level I
Debt Instrument [Line Items]
Senior Leverage Ratio	100.00%
Commitment Fee	0.25%
Level I | Prime Rate | Wintrust Term Loan
Debt Instrument [Line Items]
Additional Margin for Loans	1.00%
Level I | Prime Rate | Wintrust Revolving Loan
Debt Instrument [Line Items]
Additional Margin for Loans	0.50%
Level I | Eurodollar | Wintrust Term Loan
Debt Instrument [Line Items]
Additional Margin for Loans	4.00%
Level I | Eurodollar | Wintrust Revolving Loan
Debt Instrument [Line Items]
Additional Margin for Loans	3.50%
Level II
Debt Instrument [Line Items]
Senior Leverage Ratio	100.00%
Commitment Fee	0.25%
Level II | Prime Rate | Wintrust Term Loan
Debt Instrument [Line Items]
Additional Margin for Loans	0.25%
Level II | Prime Rate | Wintrust Revolving Loan
Debt Instrument [Line Items]
Additional Margin for Loans	0.00%
Level II | Eurodollar | Wintrust Term Loan
Debt Instrument [Line Items]
Additional Margin for Loans	3.50%
Level II | Eurodollar | Wintrust Revolving Loan
Debt Instrument [Line Items]
Additional Margin for Loans	3.00%

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Equity - Narrative (Details) - USD ($)						1 Months Ended
	Mar. 09, 2021	Feb. 18, 2021	Feb. 12, 2021	May 24, 2020	Jan. 01, 2020	Jan. 31, 2021	Jul. 31, 2020	Jun. 30, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Common stock, shares authorized (in shares)								100,000,000	100,000,000
Common stock, par or stated value per share (in usd per share)								$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)								1,000,000
Preferred stock, par or stated value per share (in usd per shares)								$ 0.0001
Offering
Class of Stock [Line Items]
Number of shares sold (in shares)			1,783,500
Share price (in usd per share)			$ 12.00
Proceeds from sale of shares, net of underwriters discounts and commissions			$ 19,800,000
Over-allotment Option
Class of Stock [Line Items]
Number of shares sold (in shares)			267,525
Share price (in usd per share)			$ 11.28
Period to purchase additional shares			30 days
Proceeds from sale of shares, net of underwriters discounts and commissions		$ 3,000,000.0
$15 Exercise Price Sponsor Warrants
Class of Stock [Line Items]
Exercise price of warrants (in usd per share)								$ 15.00	$ 15
Omnibus Incentive Plan 2019
Class of Stock [Line Items]
Number of additional shares authorized under share-based compensation plan (in shares)	600,000			500,000
Common stock, capital shares reserved for future issuance (in shares)	2,250,000			1,650,000
ESPP | Employee Stock
Class of Stock [Line Items]
Purchase price of common stock, percent of market price (no less than)					85.00%
Maximum employee subscription percentage					10.00%
Maximum contribution amount					$ 5,000
Offering period					6 months
Discount percentage from market price, beginning of purchase period					15.00%
Award vesting period					6 months
Number of shares authorized (in shares)					500,000
Shares issued (in shares)						8,928	30,825

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Equity - Outstanding Warrants (Details) - $ / shares	Jun. 30, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Class of warrant or right, outstanding (in shares)	4,403,930	4,576,799
Public Warrants
Class of Stock [Line Items]
Class of warrant or right, outstanding (in shares)	2,140,219	2,300,000
Class of warrant or right, number of securities called by each warrant or right (in shares)	0.50	0.50
Class of warrant or right, rights for half share (in usd per share)	$ 5.75	$ 5.75
Exercise price of warrants (in usd per share)	$ 11.50	$ 11.50
Private Warrants
Class of Stock [Line Items]
Class of warrant or right, outstanding (in shares)	99,000	99,000
Class of warrant or right, number of securities called by each warrant or right (in shares)	0.50	0.50
Class of warrant or right, rights for half share (in usd per share)	$ 5.75	$ 5.75
Exercise price of warrants (in usd per share)	$ 11.50	$ 11.50
$15 Exercise Price Sponsor Warrants
Class of Stock [Line Items]
Class of warrant or right, outstanding (in shares)	600,000	600,000
Class of warrant or right, number of securities called by each warrant or right (in shares)	1	1
Exercise price of warrants (in usd per share)	$ 15.00	$ 15
Merger Warrants
Class of Stock [Line Items]
Class of warrant or right, outstanding (in shares)	629,643	631,119
Class of warrant or right, number of securities called by each warrant or right (in shares)	1	1
Exercise price of warrants (in usd per share)	$ 12.50	$ 12.50
Additional Merger Warrants
Class of Stock [Line Items]
Class of warrant or right, outstanding (in shares)	935,068	946,680
Class of warrant or right, number of securities called by each warrant or right (in shares)	1	1
Exercise price of warrants (in usd per share)	$ 11.50	$ 11.50

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Fair Value Measurements (Details) - USD ($)	Feb. 24, 2021	Dec. 31, 2020
2019 Refinancing Revolving Credit Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding borrowings under credit agreement	$ 0	$ 0
Secured Debt | 2019 Refinancing Term Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt	$ 39,000,000.0	$ 39,000,000.0

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Earnings per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
EPS numerator:
Net (loss) income	$ 732	$ (2,282)	$ 2,947	$ (52)	$ (1,550)	$ 2,895
EPS denominator:
Weighted average shares outstanding - basic (in shares)	10,251,696		7,845,515		9,737,801	7,821,594
Impact of dilutive securities (in shares)	217,000		59,000		0	56,000
Weighted average shares outstanding - diluted (in shares)	10,469,028		7,905,368		9,737,801	7,878,246
EPS:
Basic (in usd per share)	$ 0.07		$ 0.38		$ (0.16)	$ 0.37
Diluted (in usd per share)	$ 0.07		$ 0.37		$ (0.16)	$ 0.37

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Earnings per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	4,418,193	4,586,936	4,630,799	4,578,054
In-the-money warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	0	0	0	0
Out-of-the-money warrants (see Note 8)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	4,403,930	4,576,799	4,403,930	4,576,799
Service-based RSUs (See Note 17)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	334	463	142,120	1,255
Performance and market-based RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	13,929	9,674	79,971	0
Employee Stock Purchase Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	0	0	4,778	0

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Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Effective tax rate	26.50%	27.40%	33.20%	14.10%
Valuation allowance	$ 0		$ 0		$ 0

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Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period	$ 0	$ 1,130
Gross increases in prior period tax positions	0	0
Gross increases in current period tax positions	0	0
Decreases related to prior year tax positions	0	(1,130)
Balance at end of period	$ 0	$ 0

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Operating Segments - Narrative (Details)	6 Months Ended
	Jun. 30, 2021 approach segment
Segment Reporting Information [Line Items]
Number of operating segments	2
Number of reportable segments	2
Number distinct approaches to customer base | approach	2
GCR
Segment Reporting Information [Line Items]
Number of reportable segments	1
ODR
Segment Reporting Information [Line Items]
Number of reportable segments	1

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Operating Segments - Condensed Consolidated Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 121,019	$ 135,185	$ 234,363	$ 273,957
Gross profit	18,690	20,335	35,919	38,559
Selling, general and administrative	17,232	13,752	34,377	30,552
Amortization of intangibles	104	274	208	417
Operating income	1,354	6,309	1,334	7,590
Interest expense, net	(452)	(2,137)	(1,716)	(4,295)
Gain on sale of property and equipment	94	(13)	8	17
Loss on early debt extinguishment	0	0	(1,961)	0
Gain (loss) on change in fair value of warrant liability	0	(102)	14	59
Total unallocated amounts	(358)	(2,252)	(3,655)	(4,219)
Income (loss) before income taxes	996	4,057	(2,321)	3,371
Depreciation and amortization	1,469	1,636	2,964	3,140
Selling, general and administrative	16,596	13,612	33,064	30,117
EBIT	2,094	6,723	2,855	8,442
GCR
Segment Reporting Information [Line Items]
Revenue	87,550	105,937
Gross profit	8,885	12,213
Selling, general and administrative	9,070	8,024
ODR
Segment Reporting Information [Line Items]
Revenue	33,469	29,248
Gross profit	9,805	8,122
Selling, general and administrative	7,526	5,588
Operating Segments
Segment Reporting Information [Line Items]
Gross profit	18,690	20,335	35,919	38,559
Operating Segments | GCR
Segment Reporting Information [Line Items]
Revenue	87,550	105,937	172,354	215,423
Gross profit	8,885	12,213	18,280	23,195
Selling, general and administrative	9,070	8,024	18,184	18,200
Depreciation and amortization	1,020	1,032	2,056	2,062
Selling, general and administrative			18,184	18,200
EBIT	(185)	4,189	96	4,995
Operating Segments | ODR
Segment Reporting Information [Line Items]
Revenue	33,469	29,248	62,009	58,534
Gross profit	9,805	8,122	17,639	15,364
Selling, general and administrative	7,526	5,588	14,880	11,917
Depreciation and amortization	345	330	700	661
Selling, general and administrative			14,880	11,917
EBIT	2,279	2,534	2,759	3,447
Corporate
Segment Reporting Information [Line Items]
Selling, general and administrative	636	140	1,313	435
Depreciation and amortization	$ 104	$ 274	$ 208	$ 417

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Operating Segments - Reconciliation of Segment Gross Profit to Consolidated Income Before Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Gross profit	$ 18,690	$ 20,335	$ 35,919	$ 38,559
Selling, general and administrative	(17,232)	(13,752)	(34,377)	(30,552)
Amortization of intangibles	(104)	(274)	(208)	(417)
Total other expenses	358	2,252	3,655	4,219
Income (loss) before income taxes	996	4,057	(2,321)	3,371
Operating Segments
Segment Reporting Information [Line Items]
Gross profit	18,690	20,335	35,919	38,559
Segment Reconciling Items
Segment Reporting Information [Line Items]
Selling, general and administrative	(17,232)	(13,752)	(34,377)	(30,552)
Amortization of intangibles	(104)	(274)	(208)	(417)
Total other expenses	$ (358)	$ (2,252)	$ (3,655)	$ (4,219)

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Leases - Supplemental Balance Sheets Information (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease right-of-use assets	$ 16,852	$ 18,751
Property, plant and equipment, net	5,251	6,242
Lease right-of-use assets	22,103	24,993
Current operating lease liabilities	4,122	3,929
Current portion of long-term debt	2,454	2,536
Long-term operating lease liabilities	13,454	15,459
Long-term debt	3,022	3,923
Total lease liabilities	23,052	25,847
Operating lease, accumulated amortization	13,900	11,900
Finance lease, accumulated amortization	$ 5,600	$ 5,300

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Leases - Summary of Lease Costs (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Lessee, Lease, Description [Line Items]
Finance lease cost, amortization	$ 652,000	$ 645,000	$ 1,327,000	$ 1,311,000
Finance lease cost, interest expense	78,000	86,000	164,000	179,000
Total lease cost	1,999,000	2,000,000	4,035,000	4,024,000
Cost of revenue
Lessee, Lease, Description [Line Items]
Operating lease cost	685,000	893,000	1,375,000	1,777,000
Cost of revenue | Operating Lease
Lessee, Lease, Description [Line Items]
Variable lease costs	100,000	100,000	200,000	400,000
Cost of revenue | Finance Lease
Lessee, Lease, Description [Line Items]
Variable lease costs	700,000	500,000	1,300,000	1,200,000
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Operating lease cost	584,000	376,000	1,169,000	757,000
Selling, general and administrative expenses | Operating Lease
Lessee, Lease, Description [Line Items]
Variable lease costs	100,000	100,000	200,000	100,000
Selling, general and administrative expenses | Finance Lease
Lessee, Lease, Description [Line Items]
Variable lease costs	$ 0	$ 0	$ 0	$ 0

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Leases - Future Minimum Lease Commitment (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Finance Leases
Remainder of 2021	$ 1,401
2022	2,404
2023	1,409
2024	598
2025	50
Thereafter	0
Total minimum lease payments	5,862
Amounts representing interest	(386)
Present value of net minimum lease payments	5,476	$ 6,459
Operating Leases
Remainder of 2021	2,479
2022	4,616
2023	3,516
2024	2,917
2025	2,409
Thereafter	4,043
Total minimum lease payments	$ 19,980

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Leases - Summary of Lease Terms and Discount Rates (Details)	Jun. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating leases, weighted average remaining lease term	5 years 1 month 24 days	5 years 5 months 23 days
Finance leases, weighted average remaining lease term	2 years 5 months 26 days	2 years 9 months 10 days
Operating leases, weighted average remaining discount rate	4.84%	4.83%
Finance leases, weighted average remaining discount rate	5.45%	5.50%

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Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating cash flows from operating leases	$ 2,456	$ 2,910
Operating cash flows from finance leases	164	179
Financing cash flows from finance leases	1,318	1,285
Right of use assets obtained in exchange for new operating lease liabilities	156	0
Right of use assets obtained in exchange for new finance lease liabilities	336	1,050
Right-of-use assets disposed or adjusted modifying operating leases liabilities	36	586
Right-of-use assets disposed or adjusted modifying finance leases liabilities	$ 0	$ (64)

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Self-Insurance - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Insurance [Abstract]
Payment to acquire workers' compensation and general liability insurance	$ 250
Malpractice insurance, annual coverage limit	$ 4,400

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Self-Insurance - Components of Self-Insurance (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Insurance [Abstract]
Current liability — workers’ compensation and general liability	$ 105	$ 197
Current liability — medical and dental	511	764
Non-current liability	776	890
Total liability shown in Accrued expenses and other current liabilities	1,392	1,851
Restricted cash	$ 113	$ 113

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Commitments and Contingencies (Details) - USD ($) $ in Millions				1 Months Ended
	Apr. 17, 2020	Jan. 23, 2020	Nov. 13, 2019	Jul. 31, 2020	Jun. 30, 2021
Surety Bond
Loss Contingencies [Line Items]
Debt outstanding					$ 265.3
Lanzo Trenchless Technologies vs. Limbach Company LLC | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, damages sought, value			$ 0.4
Bernards Bros vs. Limbach Holdings, Inc. | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, damages sought, value		$ 3.0
LA Excavating, Inc. vs. Limbach Company LP | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, damages sought, value	$ 1.0
Kimball Construction Co., Inc. vs. Limbach Company LLC | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, damages sought, value				$ 1.7

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Remaining Performance Obligations (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligations, expected timing of satisfaction, period	24 months
GCR
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, amount	$ 378.9	$ 393.5
GCR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligations, percentage	44.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	6 months
GCR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligations, percentage	56.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	1 year 6 months
ODR
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, amount	$ 44.2	$ 35.7
ODR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligations, percentage	62.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	6 months
ODR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligations, percentage	38.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	1 year 6 months

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Management Incentive Plans - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Sep. 04, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 09, 2021	May 24, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock-based compensation				$ 1,313	$ 435
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in shares)				120,899
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in shares)				185,367
MRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in shares)				0
Unrecognized share-based costs	$ 200
Weighted average period to recognize share-based costs	1 year 3 months 3 days
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock-based compensation		$ 700	$ 100	$ 1,300	400
Unrecognized share-based costs		3,600		$ 3,600
Weighted average period to recognize share-based costs				2 years
Fair value of awards vested				$ 1,300	600
Omnibus Incentive Plan 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance (in shares)						2,250,000	1,650,000
Omnibus Incentive Plan 2019 | PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in shares)				185,367
Recognized stock-based compensation		$ 200	$ 100	$ 400	$ 100

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Management Incentive Plans - RSUs Activity (Details) - RSUs	6 Months Ended
	Jun. 30, 2021 $ / shares shares
Awards
Unvested at December 31, 2020 (in shares) | shares	285,799
Granted, awards (in shares) | shares	120,899
Vested, awards (in shares) | shares	(106,383)
Forfeited, awards (in shares) | shares	(2,333)
Unvested at March 31, 2021 (in shares) | shares	297,982
Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020 (usd per share) | $ / shares	$ 6.32
Granted, weighted-average grant date fair values (usd per share) | $ / shares	12.25
Vested, weighted-average grant date fair values (usd per share) | $ / shares	6.66
Forfeited, weighted-average grant date fair values (usd per share) | $ / shares	8.27
Unvested at March 31, 2021 (usd per share) | $ / shares	$ 8.59

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Management Incentive Plans - PRSUs Activity (Details) - PRSUs	6 Months Ended
	Jun. 30, 2021 $ / shares shares
Awards
Unvested at December 31, 2020 (in shares) | shares	99,500
Granted, awards (in shares) | shares	185,367
Vested, awards (in shares) | shares	0
Forfeited, awards (in shares) | shares	(4,167)
Unvested at March 31, 2021 (in shares) | shares	280,700
Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020 (usd per share) | $ / shares	$ 4.23
Granted, weighted-average grant date fair values (usd per share) | $ / shares	12.26
Vested, weighted-average grant date fair values (usd per share) | $ / shares	0
Forfeited, weighted-average grant date fair values (usd per share) | $ / shares	8.92
Unvested at March 31, 2021 (usd per share) | $ / shares	$ 9.46

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Management Incentive Plans - MRSUs Activity (Details) - MRSUs	6 Months Ended
	Jun. 30, 2021 $ / shares shares
Awards
Unvested at December 31, 2020 (in shares) | shares	102,500
Granted, awards (in shares) | shares	0
Vested, awards (in shares) | shares	0
Forfeited, awards (in shares) | shares	0
Unvested at March 31, 2021 (in shares) | shares	102,500
Weighted-Average Grant Date Fair Value
Unvested at December 31, 2020 (usd per share) | $ / shares	$ 8.26
Granted, weighted-average grant date fair values (usd per share) | $ / shares	0
Vested, weighted-average grant date fair values (usd per share) | $ / shares	0
Forfeited, weighted-average grant date fair values (usd per share) | $ / shares	0
Unvested at March 31, 2021 (usd per share) | $ / shares	$ 8.26