10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended March 31, 2022

OR

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

For the transition period from ___________ to ___________.

Commission File Number: 001-34811

Ameresco, Inc.

(Exact name of registrant as specified in its charter)

Delaware	04-3512838
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
111 Speen Street, Suite 410 Framingham, Massachusetts	01701
(Address of Principal Executive Offices)	(Zip Code)

(508) 661-2200

(Registrant’s Telephone Number, Including Area Code)

N/A

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

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 and post 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 definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer ☑	Accelerated Filer o	Non-accelerated filer  o	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. o

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

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Class	New York Stock Exchange Symbol	Shares outstanding as of April 29, 2022
Class A Common Stock, $0.0001 par value per share	AMRC	33,808,964
Class B Common Stock, $0.0001 par value per share		18,000,000

TABLE OF CONTENTS

	Page
PART I - FINANCIAL INFORMATION
Item 1. Condensed Consolidated Financial Statements
Condensed Consolidated Balance Sheets at March 31, 2022 (Unaudited) and December 31, 2021	1
Condensed Consolidated Statements of Income for the three months ended March 31, 2022 and 2021 (Unaudited)	3
Condensed Consolidated Statements of Comprehensive Income for the three months ended March 31, 2022 and 2021 (Unaudited)	4
Condensed Consolidated Statements of Changes in Redeemable Non-Controlling Interests and Stockholders’ Equity for the three months ended March 31, 2022 and 2021 (Unaudited)	5
Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2022 and 2021 (Unaudited)	6
Notes to Condensed Consolidated Financial Statements (Unaudited)	8
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	26
Item 3. Quantitative and Qualitative Disclosures About Market Risk	34
Item 4. Controls and Procedures	34
PART II - OTHER INFORMATION
Item 1. Legal Proceedings	35
Item 1A. Risk Factors	35
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	35
Item 6. Exhibits	37
Signatures	38

Part I - Financial Information

Item 1. Condensed Consolidated Financial Statements

AMERESCO, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts)

	March 31, 2022		December 31, 2021
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents (1)	$	68,288	$	50,450
Restricted cash (1)	26,792		24,267
Accounts receivable, net of allowance of $2,265 and $2,266, respectively (1)	204,082		161,970
Accounts receivable retainage, net	40,555		43,067
Costs and estimated earnings in excess of billings (1)	460,240		306,172
Inventory, net	9,720		8,807
Prepaid expenses and other current assets (1)	19,025		25,377
Income tax receivable	4,337		5,261
Project development costs	12,162		13,214
Total current assets (1)	845,201		638,585
Federal ESPC receivable	605,871		557,669
Property and equipment, net (1)	13,063		13,117
Energy assets, net (1)	908,006		856,531
Deferred income tax assets, net	3,722		3,703
Goodwill, net	71,334		71,157
Intangible assets, net	5,974		6,961
Operating lease assets (1)	39,485		41,982
Restricted cash, net of current portion (1)	13,323		12,337
Other assets (1)	24,591		22,779
Total assets (1)	$	2,530,570	$	2,224,821
LIABILITIES, REDEEMABLE NON-CONTROLLING INTERESTS AND STOCKHOLDERS’ EQUITY
Current liabilities:
Current portions of long-term debt and financing lease liabilities (1)	$	80,191	$	78,934
Accounts payable (1)	231,533		308,963
Accrued expenses and other current liabilities (1)	43,784		43,311
Current portions of operating lease liabilities (1)	6,134		6,276
Billings in excess of cost and estimated earnings	31,729		35,918
Income taxes payable	1,771		822
Total current liabilities (1)	395,142		474,224
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs (1)	659,695		377,184
Federal ESPC liabilities	600,507		532,287
Deferred income tax liabilities, net	6,063		3,871
Deferred grant income	8,379		8,498
Long-term operating lease liabilities, net of current portion (1)	32,854		35,135
Other liabilities (1)	44,282		43,176
Commitments and contingencies (Note 9)
Redeemable non-controlling interests, net	47,438		46,182

(1) Includes restricted assets of consolidated variable interest entities (“VIEs”) at March 31, 2022 and December 31, 2021 of $136,315 and $124,454, respectively. Includes non-recourse liabilities of consolidated VIEs at March 31, 2022 and December 31, 2021 of $30,790 and $31,125, respectively. See Note 12.

1

AMERESCO, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts) (Continued)

	March 31, 2022		December 31, 2021
	(Unaudited)
Stockholders’ equity:
Preferred stock, $0.0001 par value, 5,000,000 shares authorized, no shares issued and outstanding at March 31, 2022 and December 31, 2021	$	—	$	—
Class A common stock, $0.0001 par value, 500,000,000 shares authorized, 35,910,759 shares issued and 33,808,964 shares outstanding at March 31, 2022, 35,818,104 shares issued and 33,716,309 shares outstanding at December 31, 2021	3		3
Class B common stock, $0.0001 par value, 144,000,000 shares authorized, 18,000,000 shares issued and outstanding at March 31, 2022 and December 31, 2021	2		2
Additional paid-in capital	289,459		283,982
Retained earnings	456,088		438,732
Accumulated other comprehensive loss, net	(3,889)		(6,667)
Treasury stock, at cost, 2,101,795 shares at March 31, 2022 and December 31, 2021	(11,788)		(11,788)
Stockholders’ equity before non-controlling interest	729,875		704,264
Non-controlling interest	6,335		—
Total stockholders’ equity	736,210		704,264
Total liabilities, redeemable non-controlling interests and stockholders’ equity	$	2,530,570	$	2,224,821

See notes to condensed consolidated financial statements.

2

AMERESCO, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except share and per share amounts) (Unaudited)

	Three Months Ended March 31,
	2022		2021
Revenues	$	474,002	$	252,202
Cost of revenues	405,624		205,293
Gross profit	68,378		46,909
Selling, general and administrative expenses	39,692		28,601
Operating income	28,686		18,308
Other expenses, net	7,081		3,672
Income before income taxes	21,605		14,636
Income tax provision	2,307		2,205
Net income	19,298		12,431
Net income attributable to redeemable non-controlling interests	(1,914)		(1,257)
Net income attributable to common shareholders	$	17,384	$	11,174
Net income per share attributable to common shareholders:
Basic	$	0.34	$	0.23
Diluted	$	0.32	$	0.22
Weighted average common shares outstanding:
Basic	51,744		48,975
Diluted	53,636		50,357

See notes to condensed consolidated financial statements.

3

AMERESCO, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands) (Unaudited)

	Three Months Ended March 31,
	2022		2021
Net income	$	19,298	$	12,431
Other comprehensive income (loss):
Unrealized gain from interest rate hedges, net of tax effect of $917 and $719	2,711		2,118
Foreign currency translation adjustments	67		413
Total other comprehensive income	2,778		2,531
Comprehensive income	22,076		14,962
Comprehensive income attributable to redeemable non-controlling interests	(1,914)		(1,257)
Comprehensive income attributable to common shareholders	$	20,162	$	13,705

See notes to condensed consolidated financial statements.

4

AMERESCO, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN REDEEMABLE NON-CONTROLLING INTERESTS AND STOCKHOLDERS’ EQUITY

For the Three Months Ended March 31, 2022 and 2021

(In thousands, except share amounts) (Unaudited)

			Class A Common Stock			Class B Common Stock									Treasury Stock
	Redeemable Non-controlling Interests		Shares	Amount		Shares	Amount		Additional Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Loss		Shares	Amount		Non-controlling Interest		Total Stockholders’ Equity
Balance, December 31, 2020	$	38,850	30,224,654	$	3	18,000,000	$	2	$	145,496	$	368,390	$	(9,290)	2,101,795	$	(11,788)	$	—	$	492,813
Equity offering, net of offering costs of $6,284			2,875,000						120,216											120,216
Exercise of stock options	—		166,271	—		—	—		1,386		—		—		—	—		—		1,386
Stock-based compensation expense	—		—	—		—	—		766		—		—		—	—		—		766
Unrealized gain from interest rate hedges, net	—		—	—		—	—		—		—		2,118		—	—		—		2,118
Foreign currency translation adjustment	—		—	—		—	—		—		—		413		—	—		—		413
Tax equity financing fees	(17)		—	—		—	—		—		—		—		—	—		—		—
Distributions to redeemable non-controlling interests	(453)		—	—		—	—		—		—		—		—	—		—		—
Accretion of tax equity financing fees	31		—	—		—	—		—		(31)		—		—	—		—		(31)
Net income	1,257		—	—		—	—		—		11,174		—		—	—		—		11,174
Balance, March 31, 2021	$	39,668	33,265,925	$	3	18,000,000	$	2	$	267,864	$	379,533	$	(6,759)	2,101,795	$	(11,788)	$	—	$	628,855
Balance, December 31, 2021	$	46,182	33,716,309	$	3	18,000,000	$	2	$	283,982	$	438,732	$	(6,667)	2,101,795	$	(11,788)	$	—	$	704,264
Equity offering cost adjustment	—		92,655	—		—	—		—		—		—		—	—		—		—
Exercise of stock options	—		—	—		—	—		1,708		—		—		—	—		—		1,708
Stock-based compensation expense	—		—	—		—	—		3,531		—		—		—	—		—		3,531
Unrealized gain from interest rate hedges, net	—		—	—		—	—		—		—		2,711		—	—		—		2,711
Foreign currency translation adjustment	—		—	—		—	—		—				67		—	—		—		67
Distributions to redeemable non-controlling interests	(448)		—	—		—	—		—		—		—		—	—		—		—
Accretion of tax equity financing fees	28		—	—		—	—		—		(28)		—		—	—		—		(28)
Investment fund call option exercise	(238)		—	—		—	—		238		—		—		—	—		—		238
Contributions from non-controlling interest	—		—	—		—	—		—		—		—		—	—		6,335		6,335
Net income	1,914		—	—		—	—		—		17,384		—		—	—		—		17,384
Balance, March 31, 2022	$	47,438	33,808,964	$	3	18,000,000	$	2	$	289,459	$	456,088	$	(3,889)	2,101,795	$	(11,788)	$	6,335	$	736,210

See notes to condensed consolidated financial statements.

5

AMERESCO, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands) (Unaudited)

	Three Months Ended March 31,
	2022		2021
Cash flows from operating activities:
Net income	$	19,298	$	12,431
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation of energy assets, net	11,806		9,686
Depreciation of property and equipment	734		833
Gain on contingent consideration	(320)		—
Accretion of ARO liabilities	36		24
Amortization of debt discount and debt issuance costs	852		747
Amortization of intangible assets	578		80
Provision for bad debts	237		3
Equity in (earnings) loss of unconsolidated entity	(637)		62
Net loss (gain) from derivatives	1,622		(377)
Stock-based compensation expense	3,531		766
Deferred income taxes, net	1,284		1,410
Unrealized foreign exchange loss	132		19
Changes in operating assets and liabilities:
Accounts receivable	(40,859)		15,535
Accounts receivable retainage	2,582		(1,844)
Federal ESPC receivable	(46,300)		(65,973)
Inventory, net	(914)		48
Costs and estimated earnings in excess of billings	(154,325)		6,544
Prepaid expenses and other current assets	2,813		(726)
Project development costs	1,260		1,259
Other assets	105		(600)
Accounts payable, accrued expenses and other current liabilities	(77,163)		(19,333)
Billings in excess of cost and estimated earnings	(4,309)		(3,973)
Other liabilities	(33)		(226)
Income taxes receivable, net	1,868		4,881
Cash flows from operating activities	(276,122)		(38,724)
Cash flows from investing activities:
Purchases of property and equipment	(889)		(656)
Capital investment in energy assets	(56,844)		(55,823)
Cash flows from investing activities	(57,733)		(56,479)
See notes to condensed consolidated financial statements.

6

AMERESCO, INC.
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands) (Unaudited) (Continued)
	Three Months Ended March 31,
	2022		2021
Cash flows from financing activities:
Proceeds from equity offering, net of offering costs	$	—	$	120,216
Payments of debt discount and debt issuance costs	(2,570)		(850)
Proceeds from exercises of options and ESPP	1,708		1,386
Proceeds from (payments on) senior secured revolving credit facility, net	76,000		(53,073)
Proceeds from long-term debt financings	286,744		30,811
Proceeds from Federal ESPC projects	64,788		33,520
Proceeds for (payments on) energy assets from Federal ESPC	1,925		(59)
Contributions from non-controlling interest	4,594		—
Distributions to redeemable non-controlling interests, net	(357)		(495)
Payments on long-term debt and financing leases	(77,432)		(19,073)
Cash flows from financing activities	355,400		112,383
Effect of exchange rate changes on cash	(196)		330
Net increase in cash, cash equivalents, and restricted cash	21,349		17,510
Cash, cash equivalents, and restricted cash, beginning of period	87,054		98,837
Cash, cash equivalents, and restricted cash, end of period	$	108,403	$	116,347
Supplemental disclosures of cash flow information:
Cash paid for interest	$	4,488	$	4,235
Cash paid for income taxes	$	78	$	271
Accrued purchases of energy assets	$	40,683	$	33,065

See notes to condensed consolidated financial statements.

7

AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited)

1. BASIS OF PRESENTATION

The accompanying condensed consolidated financial statements of Ameresco, Inc. (including its subsidiaries, the “Company,” “Ameresco,” “we,” “our,” or “us”) are unaudited, according to certain rules and regulations of the Securities and Exchange Commission, and include, in our opinion, normal recurring adjustments necessary for a fair presentation in conformity with accounting principles generally accepted in the United States (“GAAP”) of the results for the periods indicated.

The results of operations for the three months ended March 31, 2022 are not necessarily indicative of results which may be expected for the full year. The December 31, 2021 consolidated balance sheet data was derived from audited financial statements, but certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. The interim condensed consolidated financial statements and accompanying notes should be read in conjunction with the audited consolidated financial statements and accompanying notes for the year ended December 31, 2021, included in our annual report on Form 10-K (“2021 Annual Report” or “2021 Form 10-K”) for the year ended December 31, 2021 filed with the Securities and Exchange Commission on March 1, 2022.

Reclassification

Certain prior period amounts were reclassified to conform to the presentation in the current period.

Significant Risks and Uncertainties

The COVID-19 pandemic has continued to result in global supply chain disruptions and the resurgence of COVID-19 and its variants has caused some governments to extend travel and other restrictions.

We have considered the impact of COVID-19 on the assumptions and estimates used, which may change in response to this evolving situation. Results of future operations and liquidity could be adversely impacted by a number of factors associated with the COVID-19 pandemic including payments of outstanding receivable amounts beyond normal payment terms, supply chain disruptions, potential loss of employees due to vaccine mandates, and uncertain demand. As of the date of issuance of these condensed consolidated financial statements, we cannot reasonably estimate the extent to which the COVID-19 pandemic may impact our financial condition, liquidity, or results of operations in the foreseeable future. The ultimate impact of the pandemic on us is highly uncertain and will depend on future developments, and such impacts could exist for an extended period of time, even after the pandemic subsides.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Our accounting policies are set forth in Note 2 to the consolidated financial statements contained in our 2021 Form 10-K. We have included certain updates to those policies below.

Accounts Receivable and Allowance for Credit Losses

Changes in the allowance for credit losses are as follows:

	March 31, 2022		March 31, 2021
Allowance for credit losses, beginning of period	$	2,263	$	2,266
Provision for bad debts	237		3
Account write-offs and other	(235)		41
Allowance for credit losses, end of period	$	2,265	$	2,310

Recent Accounting Pronouncements

Reference Rate Reform

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ASU 2020-04, which provides optional guidance 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. Companies can apply the ASU immediately, however, the guidance will only be available until December 31, 2022. We are currently evaluating the impact

8

AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

that adopting this new accounting standard would have on our condensed consolidated financial statements and related disclosures.

In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope. The amendments in ASU 2021-01 provide optional expedients to the current guidance on contract modification and hedge accounting from the expected market transition from LIBOR and other interbank offered rates to alternative reference rates. The guidance generally can be applied to applicable contract modifications through December 31, 2022. We are currently evaluating the impact that adopting this new accounting standard would have on our condensed consolidated financial statements and related disclosures.

Government Assistance

In November 2021, the FASB issued ASU 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance, Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which requires annual disclosures about certain types of government assistance received. ASU 2021-10 is effective for our fiscal year beginning after December 15, 2021. We adopted this guidance as of January 1, 2022 and the adoption did not have an impact on our consolidated financial statements.

Derivatives and Hedging

In March 2022, the FASB issued ASU 2022-01, Derivatives and Hedging (Topic 815): Fair Value Hedging—Portfolio Layer Method, which expands the current single-layer method to allow multiple hedged layers of a single closed portfolio to be hedged under the method. ASU 2022-01 is effective for our year ending beginning after December 15, 2022. We are currently evaluating the impact that adopting this new accounting standard would have on our consolidated financial statements.

3. REVENUE FROM CONTRACTS WITH CUSTOMERS

Disaggregation of Revenue

Our reportable segments for the three months ended March 31, 2022 were U.S. Regions, U.S. Federal, Canada, Non-Solar Distributed Generation (“Non-Solar DG”) and All Other. On January 1, 2022, we changed the structure of our internal organization and our “All Other” segment now includes our U.S.-based enterprise energy management services previously included in our U.S Regions segment and our U.S. Regions segment now includes U.S. project revenue and associated costs previously included in our Non-Solar DG segment. As a result, previously reported amounts have been reclassified for comparative purposes.

The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended March 31, 2022:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Project revenue	$	298,632	$	62,217	$	13,951	$	—	$	18,604	$	393,404
O&M revenue	5,080		12,297		11		2,774		91		20,253
Energy assets	10,018		1,090		761		26,487		72		38,428
Integrated-PV	—		—		—		—		11,356		11,356
Other	790		42		2,449		—		7,280		10,561
Total revenues	$	314,520	$	75,646	$	17,172	$	29,261	$	37,403	$	474,002

9

AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended March 31, 2021:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Project revenue	$	75,812	$	90,089	$	9,001	$	—	$	5,791	$	180,693
O&M revenue	4,415		11,440		26		2,532		71		18,484
Energy assets	8,802		664		747		22,939		135		33,287
Integrated-PV	—		—		—		—		9,154		9,154
Other	215		21		1,869		109		8,370		10,584
Total revenues	$	89,244	$	102,214	$	11,643	$	25,580	$	23,521	$	252,202

The following table presents information related to our revenue recognized over time:

	Three Months Ended March 31,
	2022	2021
Percentage of revenue recognized over time	96%	94%

The remainder of our revenue is for products and services transferred at a point in time, at which point revenue is recognized.

We attribute revenues to customers based on the location of the customer. The following table presents information related to our revenues by geographic area:

	Three Months Ended March 31,
	2022		2021
United States	$	438,391	$	234,009
Canada	15,988		10,853
Other	19,623		7,340
Total revenues	$	474,002	$	252,202

10

AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

Contract Balances

The following tables provide information about receivables, contract assets and contract liabilities from contracts with customers:

	March 31, 2022		December 31, 2021
Accounts receivable, net	$	204,082	$	161,970
Accounts receivable retainage, net	$	40,555	$	43,067
Contract Assets:
Costs and estimated earnings in excess of billings	$	460,240	$	306,172
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	31,729	$	35,918
Billings in excess of cost and estimated earnings, non-current (1)	6,322		6,481
Total contract liabilities	$	38,051	$	42,399

	March 31, 2021		December 31, 2020
Accounts receivable, net	$	113,095	$	125,010
Accounts receivable retainage, net	$	32,071	$	30,189
Contract Assets:
Costs and estimated earnings in excess of billings	$	179,474	$	185,960
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	30,211	$	33,984
Billings in excess of cost and estimated earnings, non-current (1)	6,590		6,631
Total contract liabilities	$	36,801	$	40,615
(1) Performance obligations that are expected to be completed beyond the next twelve months and are included in other liabilities in the condensed consolidated balance sheets.

The increase in contract assets for the three months ended March 31, 2022 was primarily due to revenue recognized of $381,949 offset by billings of $229,540. Contract assets also increased due to reclassifications, primarily from contract liabilities as a result of timing of customer payments. The decrease in contract liabilities was primarily driven by recognition of revenue as performance obligations were satisfied exceeding increases from the receipt of advance payment from customers, and related billings. For the three months ended March 31, 2022, we recognized revenue of $33,077 that was previously included in the beginning balance of contract liabilities and billed customers $23,723. Changes in contract liabilities are also driven by reclassifications to or from contract assets as a result of timing of customer payments.

The decrease in contract assets for the three months ended March 31, 2021 was primarily due to billings of approximately $144,539, partially offset by revenue recognized of $130,297. The decrease in contract liabilities was primarily driven by the receipt of advance payment from customers, and related billings, exceeding reductions from the recognition of revenue as performance obligations were satisfied. For the three months ended March 31, 2021, we recognized revenue of $45,483 that was previously included in the beginning balance of contract liabilities and billed customers $33,081. Changes in contract liabilities are also driven by reclassifications to or from contract assets as a result of timing of customer payments.

Performance Obligations

Our remaining performance obligations (“backlog”) represent the unrecognized revenue value of our contract commitments. At March 31, 2022, we had contracted backlog of $2,553,770 of which approximately 48% is anticipated to be recognized as revenue in the next twelve months. The remaining performance obligations primarily relate to the energy efficiency and renewable energy

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(In thousands) (Unaudited) (Continued)

construction projects, including long-term operations and maintenance (“O&M”) services related to these projects. The long-term services have varying initial contract terms, up to 25 years.

Project Development Costs

Project development costs of $4,209 and $1,985 were recognized in the condensed consolidated statements of income on projects that converted to customer contracts during the three months ended March 31, 2022 and 2021, respectively.

No impairment charges in connection with our project development costs were recorded during the three months ended March 31, 2022 and 2021.

4. GOODWILL AND INTANGIBLE ASSETS, NET

The changes in the carrying value of goodwill balances by reportable segment were as follows:

	U.S. Regions		U.S. Federal		Canada		Non-solar DG		Other		Total
Balance, December 31, 2021	$	39,204	$	3,981	$	3,454	$	—	$	24,518	$	71,157
Remeasurement adjustment	309		—		—		—		—		309
Currency effects	—		—		53		—		(185)		(132)
Balance, March 31, 2022	$	39,513	$	3,981	$	3,507	$	—	$	24,333	$	71,334

Definite-lived intangible assets, net consisted of the following:

	As of March 31, 2022		As of December 31, 2021
Gross carrying amount	$	32,939	33,526
Less - accumulated amortization	(26,965)		(26,565)
Intangible assets, net	$	5,974	$	6,961

The table below sets forth amortization expense:

		Three Months Ended March 31,
Asset type	Location	2022		2021
Customer contracts	Cost of revenues	$	184	$	—
All other intangible assets	Selling, general and administrative expenses	394		80
Total amortization expense		$	578	$	80

5. ENERGY ASSETS, NET

Energy assets, net consisted of the following:

	March 31, 2022		December 31, 2021
Energy assets (1)	$	1,184,314	$	1,120,712
Less - accumulated depreciation and amortization	(276,308)		(264,181)
Energy assets, net	$	908,006	$	856,531
(1) Includes financing lease assets (see Note 6), capitalized interest and Asset retirement obligations (“ARO”) assets (see tables below).

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(In thousands) (Unaudited) (Continued)

The following table sets forth our depreciation and amortization expense on energy assets, net of deferred grant amortization:

	Three Months Ended March 31,
Location	2022		2021
Cost of revenues (2)	$	11,806	$	9,686
(2) Includes depreciation and amortization on financing lease assets (see Note 6).

The following table presents the interest costs relating to construction financing during the period of construction, which were capitalized as part of energy assets, net:

	Three Months Ended March 31,
	2022		2021
Capitalized interest	$	1,312	$	2,238

The following tables sets forth information related to our ARO assets and ARO liabilities:

	Location	March 31, 2022		December 31, 2021
ARO assets, net	Energy assets, net	$	2,473	$	1,939
ARO liabilities, current	Accrued expenses and other current liabilities	$	9	$	6
ARO liabilities, non-current	Other liabilities	2,947		2,342
Total ARO liabilities		$	2,956	$	2,348

	Three Months Ended March 31,
	2022		2021
Depreciation expense of ARO assets	$	37	$	23
Accretion expense of ARO liabilities	$	36	$	24

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

6. LEASES

The table below sets forth supplemental condensed consolidated balance sheet information related to our leases:

	March 31, 2022			December 31, 2021
Operating Leases:
Operating lease assets	$	39,485		$	41,982
Current portions of operating lease liabilities	$	6,134		$	6,276
Long-term portions of operating lease liabilities	32,854			35,135
Total operating lease liabilities	$	38,988		$	41,411
Weighted-average remaining lease term	12 years			12 years
Weighted-average discount rate	5.7		%	5.7		%
Financing Leases:
Energy assets	$	31,521		$	31,876
Current portions of financing lease liabilities	$	3,226		$	3,125
Long-term financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	15,973			16,101
Total financing lease liabilities	$	19,199		$	19,226
Weighted-average remaining lease term	15 years			15 years
Weighted-average discount rate	12.1		%	12.1		%

The costs related to our leases were as follows:

	Three Months Ended March 31,
	2022		2021
Operating Leases:
Operating lease costs	$	2,291	$	2,153
Financing Leases:
Amortization expense	355		532
Interest on lease liabilities	559		658
Total lease costs	$	3,205	$	3,343

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(In thousands) (Unaudited) (Continued)

Supplemental cash flow information related to our leases was as follows:

	Three Months Ended March 31,
	2022		2021
Cash paid for amounts included in the measurement of operating lease liabilities	$	1,907	$	2,423
Right-of-use assets (“ROU”) obtained in exchange for new operating lease liabilities	$	367	$	3,773

The table below sets forth our estimated minimum future lease obligations under our leases:

	Operating Leases		Financing Leases
Year ended December 31,
2022	$	6,134	$	5,124
2023	7,176		3,676
2024	5,943		2,565
2025	4,725		2,213
2026	2,880		2,054
Thereafter	28,615		19,813
Total minimum lease payments	55,473		35,445
Less: interest	16,485		16,246
Present value of lease liabilities	$	38,988	$	19,199

Sale-leasebacks

In March 2022, we entered into an amendment to our August 2018 long-term financing facility which extended the end date of the agreement from March 31, 2022 to June 30, 2022. We sold and leased back two energy assets for $8,201 in cash proceeds under this agreement during the three months ended March 31, 2022. As of March 31, 2022, approximately $220,367 remained available under this lending commitment.

In March 2022, we entered into an amendment to our December 2020 long-term financing facility which extended the end date of the agreement from December 31, 2021 to July 15, 2022. We sold and leased back one energy asset for $4,423 in cash proceeds under this facility during three months ended March 31, 2022. As of March 31, 2022, approximately $11,515 remained available under this lending commitment.

These transactions are accounted for as failed sale leasebacks and are classified as long-term financing facilities. See Note 7 for additional information.

Net gains from amortization expense recognized in cost of revenues relating to deferred gains and losses in connection with our sale-leaseback agreements were $57 for each of the three months ended March 31, 2022 and 2021.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

7. DEBT AND FINANCING LEASE LIABILITIES

Our debt and financing lease liabilities comprised of the following:

	March 31, 2022		December 31, 2021
Senior secured revolving credit facility (1)	$	121,000	$	45,000
Senior secured term loans	275,000		52,813
Non-recourse construction revolvers	31,910		31,698
Non-recourse term loans (4)	205,329		218,136
Long-term financing facilities (2)	104,417		104,615
Financing lease liabilities (3)	19,199		19,226
Total debt and financing lease liabilities	756,855		471,488
Less: current maturities	80,191		78,934
Less: unamortized discount and debt issuance costs	16,969		15,370
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	$	659,695	$	377,184
(1) At March 31, 2022, funds of $47,341 were available for borrowing under this facility.
(2) These facilities are sale-leaseback arrangements and are accounted for as failed sales. See Note 6 for additional disclosures.
(3) Financing lease liabilities are sale-leaseback arrangements under previous guidance. See Note 6 for additional disclosures.
(4) As of March 31, 2021, we were in default on one non-recourse term loan with a balance of $3,809 for failure to meet the debt service coverage ratio of 1 to 1, however, a waiver was received in April 2022.

Senior Secured Credit Facility - Revolver and Term Loans

On March 4, 2022, we entered into the fifth amended and restated senior secured credit facility with five banks, which included the following amendments:

•increased the aggregate amount of total commitments from $245,000 to $495,000,

•increased the aggregate amount of the revolving commitments from $180,000 to $200,000,

•increased the existing term loan A from $65,000 to $75,000,

•extended the maturity date of the revolving commitment and term loan A from June 28, 2024 to March 4, 2025,

•added a delayed draw term loan A for up to $220,000 through a September 4, 2023 maturity date,

•increased the total funded debt to EBITDA covenant ratio from a maximum of 3.50 to 4.50 for the quarter ended March 31, 2022; 4.25 for the quarter ending June 30, 2022, 4.00 for the quarters ending September 30, 2022 and December 31, 2022; and 3.50 thereafter,

•specified the debt service coverage ratio (the ratio of (a) cash flow of the core Ameresco companies, to (b) debt service of the core Ameresco companies as of the end of each fiscal quarter to be less than 1.5, and

•increased our limit under an energy conversation project financing to $650,000, which provides us with flexibility to grow our federal business further.

The revolving credit facility may be increased by an amount up to an additional $100,000 in increments of at least $25,000 at the approval of the lenders, subject to certain conditions.

We accounted for this amendment as a modification and at closing we incurred $2,048 in lenders fees which were reflected as debt discount and $352 in third party fees which were reflected as debt issuance costs. The unamortized debt discount and issuance costs of the previous agreement are being amortized over the remaining term of the amended agreement, with the exception of $96 of costs relating to a previous syndicated lender which did not participate in this amendment. These costs were expensed in other expenses, net during the three months ended March 31, 2022.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

Construction Revolvers

Construction Revolver, 1.74%, due June 2022

In March 2022, we entered into a fourth amendment to the 1.74% construction revolver to extend this facility from March 2022 to June 2022. All remaining unpaid amounts outstanding under the facility are due at that time. As of March 31, 2022, $73,946 was available for borrowing under this facility.

On April 29, 2022, a wholly-owned subsidiary of ours executed a joinder agreement to the 1.74% construction revolver, which added it as an additional borrower under the master construction loan agreement. At closing, we borrowed $9,800 for a solar and storage project.

Construction Revolver, 1.99%, due July 2022

As of March 31, 2022, $24,145 was available for borrowing under the 1.74% construction revolver.

8. INCOME TAXES

We recorded a provision for income taxes of $2,307 and $2,205 for the three months ended March 31, 2022 and 2021, respectively. The estimated effective annualized tax rate impacted by the period discrete items is a provision of 10.7% for the three months ended March 31, 2022, compared to a provision of 15.1% of estimated effective annualized tax rate for the three months ended March 31, 2021.

The principal reasons for the difference between the statutory rate and the estimated annual effective rate for 2022 were the effects of investment tax credits which we are entitled from solar plants placed into service or are forecasted to be placed into service during 2022, state taxes, and the tax deductions related to the Section 179D deduction.

The principal reasons for the difference between the statutory rate and the estimated annual effective rate for 2021 were the effects of investment tax credits which we are entitled from solar plants placed into service or are forecasted placed into service during 2021, the tax deductions related to the Section 179D deduction, the deduction of compensation expense associated with certain employee stock options, and tax basis adjustments on certain partnership flip transactions.

Under GAAP accounting rules deferred taxes are shown on a net basis in the condensed consolidated financial statements based on taxing jurisdiction. Under the guidance, we have recorded long term deferred tax assets and deferred tax liabilities based on the underlying jurisdiction in the accompanying condensed consolidated balance sheets.

The following table sets forth the total amounts of gross unrecognized tax benefits:

	Gross Unrecognized Tax Benefits
Balance, December 31, 2021	$	900
Balance, March 31, 2022	$	900

The amount of unrecognized tax benefits that, if recognized, would favorably affect the effective income tax rate in any future periods was $440 at March 31, 2022 and December 31, 2021 (net of the federal benefit on state amounts).

9. COMMITMENTS AND CONTINGENCIES

From time to time, we issue letters of credit and performance bonds with our third-party lenders, to provide collateral.

Legal Proceedings

On November 6, 2017, we were served with a complaint filed by a customer against nine contractors, including us, claiming both physical damages to the customer’s tangible property and damages caused by various alleged defects in the design of the project through negligent acts and/or omissions, breaches of contract and breaches of the “implied warranty of good and workmanlike manner.” During the three months ended March 31, 2022, we entered into a settlement agreement and adjusted our accrual for the actual net loss after taking into account our insurance proceeds, which is included in accrued expenses and other current liabilities in our condensed consolidated balance sheets as of March 31, 2022. In addition, we reversed the loss recovery from insurance proceeds.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

We are involved in a variety of other claims and other legal proceedings generally incidental to our normal business activities. While the outcome of any of these proceedings cannot be accurately predicted, we do not believe the ultimate resolution of any of these existing matters would have a material adverse effect on our financial condition or results of operations.

Commitment as a Result of an Acquisition

In August 2018, we completed an acquisition which provided for a revenue earn-out contingent upon the acquired business meeting certain cumulative revenue targets over 5 years from the acquisition date. The fair value decreased from $678 at December 31, 2021 to $358 at March 31, 2022 and is included in other liabilities on the condensed consolidated balance sheets. The contingent consideration will be paid annually in May, if any of the cumulative revenue targets are achieved. No payments have been made to date.

In December 2021, we completed our acquisition of Plug Smart which provided for an earn-out based on future EBITDA targets beginning with EBITDA performance for the month of December 2021 and each fiscal year thereafter, over a five-year period through December 31, 2026. The maximum cumulative earn-out is $5,000 and we evaluated financial forecasts of the acquired business and concluded that the fair value of this earn-out was approximately $2,160 upon acquisition and remained consistent as of December 31, 2021. At March 31, 2022, the fair value of the contingent consideration was $2,061 and is included in other liabilities on the consolidated balance sheets. No payments have been made to date.

See note 10 for additional information.

10. FAIR VALUE MEASUREMENT

We recognize our financial assets and liabilities at fair value on a recurring basis. Fair value is defined as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Three levels of inputs that may be used to measure fair value are as follows:

Level 1: Inputs are based on unadjusted quoted prices for identical instruments traded in active markets. 

Level 2: Inputs are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. 

Level 3: Inputs are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. The fair values are therefore determined using model-based techniques that include option pricing models, discounted cash flow models, and similar techniques. 

The following table presents the input level used to determine the fair values of our financial instruments measured at fair value on a recurring basis:

		Fair Value as of
	Level	March 31, 2022		December 31, 2021
Assets:
Interest rate swap instruments	2	$	2,220	$	919
Total assets		$	2,220	$	919
Liabilities:
Interest rate swap instruments	2	$	2,726	$	6,316
Commodity swap instruments	2	4,568		1,962
Make-whole provisions	2	5,085		4,800
Contingent consideration	3	2,419		2,838
Total liabilities		$	14,798	$	15,916

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

The following table sets forth a summary of changes in the fair value of contingent consideration liability classified as level 3:

	Year Ended December 31,
	March 31, 2022		December 31, 2021
Contingent consideration liability balance at the beginning of period	$	2,838	$	678
Contingent consideration issued in connection with acquisition	—		2,160
Changes in fair value included in earnings	(320)		—
Remeasurement adjustment	(99)		—
Contingent consideration liability balance at the end of period	$	2,419	$	2,838

The following table sets forth the fair value and the carrying value of our long-term debt, excluding financing leases:

	As of March 31, 2022				As of December 31, 2021
	Fair Value		Carrying Value		Fair Value		Carrying Value
Long-term debt (Level 2)	$	726,649	$	720,687	$	442,429	$	436,892

The fair value of our long-term debt was estimated using discounted cash flows analysis, based on our current incremental borrowing rates for similar types of borrowing arrangements which are considered to be level two inputs. There have been no transfers in or out of level two or three financial instruments for the three months ended March 31, 2022 and the year ended December 31, 2021.

We are also required to periodically measure certain other assets at fair value on a nonrecurring basis, including long-lived assets, goodwill and other intangible assets. We calculated the fair value used in our annual goodwill impairment analysis utilizing a discounted cash flow analysis and determined that the inputs used were level 3 inputs. There were no assets recorded at fair value on a non-recurring basis as of March 31, 2022 or December 31, 2021.

11. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

The following table presents information about the fair value amounts of our cash flow derivative instruments:  

		Derivatives as of
		March 31, 2022		December 31, 2021
	Balance Sheet Location	Fair Value		Fair Value
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other assets	$	39	$	—
Interest rate swap contracts	Other liabilities	$	2,726	$	6,316
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other assets	$	2,181	$	919
Commodity swap contracts	Other liabilities	$	4,568	$	1,962
Make-whole provisions	Other liabilities	$	5,085	$	4,800

As of March 31, 2022 and December 31, 2021, all but four of our freestanding derivatives were designated as hedging instruments.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

The following table presents information about the effects of our derivative instruments on our condensed consolidated statements of income and condensed consolidated statements of comprehensive income:

		Amount of Loss (Gain) Recognized in Net Income
	Location of Loss (Gain) Recognized in Net Income	Three Months Ended March 31,
		2022		2021
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	481	$	523
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	(1,262)	$	(1,323)
Commodity swap contracts	Other expenses, net	$	2,606	$	248
Make-whole provisions	Other expenses, net	$	278	$	697

The following table presents the changes in Accumulated Other Comprehensive Income (“AOCI”), net of taxes, from our hedging instruments:

	Three Months Ended March 31, 2022
Derivatives Designated as Hedging Instruments:
Accumulated loss in AOCI at the beginning of the period	$	(4,733)
Unrealized gain recognized in AOCI	2,230
Loss reclassified from AOCI to other expenses, net	481
Net gain on derivatives	2,711
Accumulated loss in AOCI at the end of the period	$	(2,022)

The following tables present all of our active derivative instruments as of March 31, 2022:

Active Interest Rate Swaps	Effective Date	Expiration Date	Initial Notional Amount ($)		Status
11-Year, 5.77% Fixed	October 2018	October 2029	$	9,200	Designated
15-Year, 5.24% Fixed	June 2018	June 2033	$	10,000	Designated
10-Year, 4.74% Fixed	June 2017	December 2027	$	14,100	Designated
15-Year, 3.26% Fixed	February 2023	December 2038	$	14,084	Designated
7-Year, 2.19% Fixed	February 2016	February 2023	$	20,746	Designated
8-Year, 3.70% Fixed	March 2020	June 2028	$	14,643	Designated
8-Year, 3.70% Fixed	March 2020	June 2028	$	10,734	Designated
13-Year, 0.93% Fixed	May 2020	March 2033	$	9,505	Not Designated
13-Year, 0.93% Fixed	May 2020	March 2033	$	6,968	Not Designated
15.5-Year, 5.40% Fixed	September 2008	March 2024	$	13,081	Designated
2.75-Year, 0.41% Fixed	December 2020	September 2023	$	26,250	Not Designated

Active Commodity Swaps	Effective Date	Expiration Date	Initial Notional Amount (Volume)	Commodity Measurement	Status
3.5-Year, $2.65 MMBtu Fixed	December 2020	June 2024	3,296,160	MMBtus	Not Designated

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

Other Derivatives	Classification	Effective Date	Expiration Date	Fair Value ($)
Make-whole provisions	Liability	June/August 2018	December 2038	$	583
Make-whole provisions	Liability	August 2016	April 2031	$	77
Make-whole provisions	Liability	April 2017	February 2034	$	72
Make-whole provisions	Liability	November 2020	December 2027	$	56
Make-whole provisions	Liability	October 2011	May 2028	$	12
Make-whole provisions	Liability	May 2021	April 2045	$	319
Make-whole provisions	Liability	July 2021	March 2046	$	3,966

12. VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS

Variable Interest Entities

The table below presents a summary of amounts related to our consolidated investment funds and joint venture, which we determined meet the definition of a variable interest entity (“VIE”), as of:

	March 31,		December 31,
	2022 (1)		2021 (1)
Cash and cash equivalents	$	5,434	$	4,915
Restricted cash	776		822
Accounts receivable, net	790		656
Costs and estimated earnings in excess of billings	1,884		1,421
Prepaid expenses and other current assets	159		151
Total VIE current assets	9,043		7,965
Property and equipment, net	1,266		1,266
Energy assets, net	119,310		108,498
Operating lease assets	6,225		6,271
Restricted cash, net of current portion	435		418
Other assets	36		36
Total VIE assets	$	136,315	$	124,454
Current portions of long-term debt and financing lease liabilities	$	2,196	$	2,210
Accounts payable	94		47
Accrued expenses and other current liabilities	548		643
Current portions of operating lease liabilities	147		142
Total VIE current liabilities	2,985		3,042
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	20,499		20,952
Long-term operating lease liabilities, net of current portion	6,630		6,558
Other liabilities	676		573
Total VIE liabilities	$	30,790	$	31,125
(1) The amounts in the above table are reflected in Note 1 on our condensed consolidated balance sheets.

See Note 13 for additional information on the call and put options related to our investment funds.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

Non-controlling Interest

Non-controlling interest represents the equity owned by the other joint venture member of a consolidated joint venture. During the three months ended March 31, 2022, the other joint venture member contributed $6,335 to this joint venture which was formed for a specific project. The project did not generate any earnings or losses during the three months ended March 31, 2022.

Equity Method Investments

Unconsolidated joint ventures are accounted for under the equity method. For these unconsolidated joint ventures, our investment balances are included in other assets on the condensed consolidated balance sheets and our pro rata share of net income or loss is included in operating income.

The following table provides information about our equity method investments in joint ventures:

	As of
	March 31, 2022		December 31, 2021
Equity method investments	$	9,839	$	9,206
	Three Months Ended March 31,
	March 31, 2022		March 31, 2021
Earnings (loss) recognized	$	637	$	(62)

13. REDEEMABLE NON-CONTROLLING INTERESTS

Our subsidiaries with membership interests in the investment funds we formed have the right to elect to require the non-controlling interest holder to sell all of its membership units to our subsidiaries, a call option. Our investment funds also include rights for the non-controlling interest holder to elect to require our subsidiaries to purchase all of the non-controlling membership interests in the fund, a put option.

The call options are exercisable beginning on the date that specified conditions are met for each respective fund. The put options for the investment funds are exercisable beginning on the date that specified conditions are met for each respective fund.

We initially record our redeemable non-controlling interests at fair value on the date of acquisition and subsequently adjust to redemption value. At both March 31, 2022 and December 31, 2021 redeemable non-controlling interests were reported at their carrying values, as the carrying value at each reporting period was greater than the estimated redemption value.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

14. EARNINGS PER SHARE

Earnings Per Share

The following is a reconciliation of the numerator and denominator for the computation of basic and diluted earnings per share:

	Three Months Ended March 31,
(In thousands, except per share data)	2022		2021
Numerator:
Net income attributable to common shareholders	$	17,384	$	11,174
Adjustment for accretion of tax equity financing fees	(28)		(31)
Income attributable to common shareholders	$	17,356	$	11,143
Denominator:
Basic weighted-average shares outstanding	51,744		48,975
Effect of dilutive securities:
Stock options	1,892		1,382
Diluted weighted-average shares outstanding	53,636		50,357
Net income per share attributable to common shareholders:
Basic	$	0.34	$	0.23
Diluted	$	0.32	$	0.22
Potentially dilutive shares (1)	783		1,157
(1) Potentially dilutive shares attributable to stock options were excluded from the computation of diluted earnings per share as the effect would have been anti-dilutive.

15. STOCK-BASED COMPENSATION

We recorded stock-based compensation expense, including expense related to our employee stock purchase plan, as follows:

	Three Months Ended March 31,
	2022		2021
Stock-based compensation expense	$	3,531	$	766

Our stock-based compensation expense is included in selling, general and administrative expenses in the condensed consolidated statements of income. As of March 31, 2022, there was $46,295 of unrecognized compensation expense related to non-vested stock option awards that is expected to be recognized over a weighted-average period of 4.0 years.

Stock Option Grants

During the three months ended March 31, 2022, we granted 313 common stock options to certain employees under our 2020 Stock Incentive Plan, which have a contractual life of ten years and vest over a five-year period. We did not grant awards to individuals who were not either an employee or director of ours during the three months ended March 31, 2022 and 2021.

16. BUSINESS SEGMENT INFORMATION

Our reportable segments for the three months ended March 31, 2022 were U.S. Regions, U.S. Federal, Canada, Non-Solar DG and All Other. On January 1, 2022, we changed the structure of our internal organization and our “All Other” segment now includes our U.S.-based enterprise energy management services previously included in our U.S Regions segment and our U.S. Regions segment now includes U.S. project revenue and associated costs previously included in our Non-Solar DG segment. As a result, previously reported amounts have been reclassified for comparative purposes.

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AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

Our U.S. Regions, U.S. Federal and Canada segments offer energy efficiency products and services which include the design, engineering and installation of equipment and other measures to improve the efficiency and control the operation of a facility’s energy infrastructure, renewable energy solutions and services and the development and construction of small-scale plants that Ameresco owns or develops for customers that produce electricity, gas, heat or cooling from renewable sources of energy and O&M services.

Our Non-Solar DG segment sells electricity, processed renewable gas fuel, heat or cooling, produced from renewable sources of energy, other than solar, and generated by small-scale plants that we own and O&M services for customer-owned small-scale plants.

The “All Other” category includes enterprise energy management services, other than the U.S.-based portion; consulting services, energy efficiency products and services outside of the U.S. and Canada; and the sale of solar PV energy products and systems which we refer to as integrated-PV.

These segments do not include results of other activities, such as corporate operating expenses not specifically allocated to the segments. Certain reportable segments are an aggregation of operating segments.

The tables below present our business segment information recast for the prior-year period and a reconciliation to the condensed consolidated financial statements:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total Consolidated
Three Months Ended March 31, 2022
Revenues	$	314,520	$	75,646	$	17,172	$	29,261	$	37,403	$	474,002
Loss on derivatives	227		51		—		1,344		—		1,622
Interest expense, net of interest income	1,642		306		222		1,790		(7)		3,953
Depreciation and amortization of intangible assets	5,278		1,245		447		5,416		271		12,657
Unallocated corporate activity	—		—		—		—		—		(15,909)
Income before taxes, excluding unallocated corporate activity	18,218		8,886		279		7,422		2,709		37,514
Three Months Ended March 31, 2021
Revenues	$	89,244	$	102,214	$	11,643	$	25,580	$	23,521	$	252,202
Loss (gain) on derivatives	532		—		179		(1,074)		—		(363)
Interest expense, net of interest income	1,443		321		207		610		159		2,740
Depreciation and amortization of intangible assets	3,486		1,010		415		4,862		377		10,150
Unallocated corporate activity	—		—		—		—		—		(10,965)
Income before taxes, excluding unallocated corporate activity	3,239		12,030		(85)		8,772		1,645		25,601

See Note 3 for additional information about our revenues by product line.

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AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

17. OTHER EXPENSES, NET

The following table presents the components of other expenses, net:

	Three Months Ended March 31,
	2022		2021
Loss (gain) on derivatives	$	1,622	$	(377)
Interest expense, net of interest income	4,489		2,805
Amortization of debt discount and debt issuance costs	852		747
Foreign currency transaction loss	116		495
Government incentives	2		2
Other expenses, net	$	7,081	$	3,672

18. SUBSEQUENT EVENT

In April 2022, we entered into a binding Framework Agreement Term Sheet with a battery manufacturer for the purchase and sale of battery energy storage (“BESS”) equipment for our BESS projects at committed amounts and agreed upon delivery dates for a period of several years. The purchase and sale commitment covers BESS equipment to be used for our BESS projects. In connection with entering into the term sheet, we agreed to pay a $10,000 deposit, which will be credited against our future equipment purchases.

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

You should read the following discussion and analysis of our financial condition and results of operations together with our unaudited condensed consolidated financial statements and the related notes thereto included in Part I, Item 1 of this Quarterly Report on Form 10-Q and the audited consolidated financial statements and notes thereto and management’s discussion and analysis of financial condition and results of operations for the year ended December 31, 2021 included in our Annual Report on Form 10-K (“2021 Annual Report”) for the year ended December 31, 2021 filed on March 1, 2022 with the U.S. Securities and Exchange Commission (“SEC”). This Quarterly Report on Form 10-Q contains “forward-looking statements” within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended, (the “Exchange Act”). Forward looking statements include statements regarding our strategy, future operations, future financial position, future revenues, projected costs, prospects, plans, objectives of management, expected market growth and other characterizations of future events or circumstances. All statements, other than statements of historical fact, including statements that refer to our expectations as to the future growth of our business and associated expenses; our expectations as to revenue generation; the future availability of borrowings under our revolving credit facility; the expected future growth of the market for energy efficiency and renewable energy solutions; our backlog, awarded projects and recurring revenue and the timing of such matters; our expectations as to acquisition activity; the impact of any restructuring; the uses of future earnings; our intention to repurchase shares of our Class A common stock; the expected energy and cost savings of our projects; the expected energy production capacity of our renewable energy plants; the results of the SEC’s investigation into our revenue recognition and compensation practices in our software-as-a-service businesses; the impact of the ongoing COVID-19 pandemic and supply chain disruptions and shortage of materials; our expectations related to our agreement with SCE including the impact of any delays; the impact of the U.S. Department of Commerce’s solar panel import investigation and other characterizations of future events or circumstances are forward-looking statements. Forward looking statements are often, but not exclusively, identified by the use of words such as “may,” “will,” “expect,” “believe,” “anticipate,” “intend,” “could,” “estimate,” “target,” “project,” “predict” or “continue,” and similar expressions or variations. These forward-looking statements are based on current expectations and assumptions that are subject to risks, uncertainties and other factors that could cause actual results and the timing of certain events to differ materially and adversely from future results expressed or implied by such forward-looking statements. Risks, uncertainties and factors that could cause or contribute to such differences include, but are not limited to, those discussed in the section titled “Risk Factors,” set forth in Item 1A of our 2021 Annual Report and in Item 1A and elsewhere in this Quarterly Report on Form 10-Q. The forward-looking statements in this Quarterly Report on Form 10-Q represent our views as of the date of this Quarterly Report on Form 10-Q. Subsequent events and developments may cause our views to change. However, while we may elect to update these forward-looking statements at some point in the future, we have no current intention of doing so and undertake no obligation to do so except to the extent required by applicable law. You should, therefore, not rely on these forward-looking statements as representing our views as of any date subsequent to the date of this Quarterly Report on Form 10-Q.

Overview

Ameresco is a leading clean technology integrator with a comprehensive portfolio of energy efficiency and renewable energy supply solutions. We help organizations meet energy savings and energy management challenges with an integrated comprehensive approach to energy efficiency and renewable energy. Leveraging budget neutral solutions, including energy savings performance contracts (“ESPCs”) and power purchase agreements (“PPAs”), we aim to eliminate the financial barriers that traditionally hamper energy efficiency and renewable energy projects.

Drawing from decades of experience, Ameresco develops tailored energy management projects for its customers in the commercial, industrial, local, state, and federal government, K-12 education, higher education, healthcare, public housing sectors, and utilities.

We provide solutions primarily throughout North America and the U.K. and our revenues are derived principally from energy efficiency projects, which entail the design, engineering, and installation of equipment and other measures that incorporate a range of innovative technology and techniques to improve the efficiency and control the operation of a facility’s energy infrastructure; this can include designing and constructing a central plant or cogeneration system for a customer providing power, heat and/or cooling to a building, or other small-scale plant that produces electricity, gas, heat or cooling from renewable sources of energy. We also derive revenue from long-term O&M contracts, energy supply contracts for renewable energy operating assets that we own, integrated-PV, and consulting and enterprise energy management services.

In addition to organic growth, strategic acquisitions of complementary businesses and assets have been an important part of our growth enabling us to broaden our service offerings and expand our geographical reach. In December 2021, we completed the acquisition of Plug Smart, an Ohio-based energy services company that specializes in the development and implementation of budget neutral capital improvement projects including building controls and building automation systems. This acquisition allows us to expand our existing pipeline and solution offerings in the smart buildings sector. The pro forma effects of this acquisition were not material to our operations for the fiscal years presented.

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Key Factors and Trends

The Southern California Edison (“SCE”) Agreement

In October 2021, we entered into a contract with SCE to design and build three grid scale battery energy storage systems (“BESS”) at existing substation parcels throughout SCE’s service territory in California. The engineering, procurement and construction price is approximately $892.0 million, in the aggregate, including two years of O&M revenues, subject to customary potential adjustments for changes in the work.

We are obligated under the SCE Agreement to achieve substantial completion of all facilities, subject to extension for specified force majeure events and customer-caused delays, no later than August 1, 2022 (the “Guaranteed Completion Date”). If we fail to achieve substantial completion of any of the facilities by the Guaranteed Completion Date, as such date may be extended, we are obligated to pay liquidated damages. In addition, we provided availability and capacity guarantees under the SCE Agreement, failure of which entitles the customer to liquidated damages. We expect a material portion of our revenue for 2022 will be generated from this SCE Agreement, and a material portion of the contract expenditures under this agreement have been and are being incurred during the first half of 2022. If we fail to achieve the milestone dates or fail to meet the availability and capacity guarantees, we may be required to pay liquidated damages and under certain circumstances SCE may have a right to terminate the agreement.

As previously disclosed, at the end of March 2022, our battery supplier for the SCE battery storage project indicated that the COVID-19 lockdowns in several regions around China were having an adverse impact on the supplier’s ability to deliver batteries on the agreed upon timeline. In addition, the supplier indicated that newly implemented Chinese transportation safety policies may cause delays in the shipment of a portion of the batteries. Following a review of these circumstances, we provided SCE with a force majeure notice under the SCE Agreement as we determined that these circumstances may prevent us from fully completing all three BESS projects by the August 1, 2022 Guaranteed Completion Date. Under the SCE Agreement, the occurrence of force majeure events, including certain COVID-related delays, results in extensions of required completion deadlines without liquidated damages and an increase in the contract price, subject to the party claiming a force majeure event being in compliance with its contractual obligations. We are engaged in continuing discussions with SCE regarding the applicability and scope of any force majeure relief relating to these circumstances, and are also actively working with SCE, our suppliers, and governmental agencies to mitigate delays.

COVID-19, Supply Chain Disruptions, and Other Global Factors

We continue to monitor the impact of COVID-19 on our operations, financial results, and liquidity. The impact to our future operations and results, however, remains uncertain and will depend on a number of factors, including, but not limited to, the emergence and spread of more transmissible variants, the overall duration and severity of the pandemic, and its impact on the global economy, our customers, and business and workforce disruptions. Infection rates and regulations continue to fluctuate in various regions and there are ongoing global impacts resulting from the pandemic that may persist, including challenges and increases in costs for logistics and supply chains, such as increased port congestion, and intermittent supplier delays as well as shortage of certain components needed for our business, such as lithium-ion battery cells for our energy storage products. During the three months ended March 31, 2022, we experienced supply chain disruptions, including as a result of COVID-19, causing delays in the timely delivery of material to customer sites and delays and disruptions in the completion of certain projects, including those pursuant to the SCE Agreement. This negatively impacted our results of operations during the three months ended March 31, 2022. We expect the trends of supply challenges to continue for the remainder of this year. We continue to monitor macroeconomic conditions to remain flexible and to optimize and evolve our business as appropriate to address the challenges presented from these conditions. For example, in April 2022, we entered into a binding framework agreement term sheet with a battery manufacturer for the purchase and sale of battery energy storage (“BESS”) equipment for our BESS projects at committed amounts and agreed upon delivery dates for a period of several years. The purchase and sale commitment covers BESS equipment to be used for our BESS projects and assets. In connection with entering into the term sheet, we agreed to pay a $10 million deposit which will be credited against our future equipment purchases.

In March 2022, the US Department of Commerce announced that it is investigating if certain solar cell and panel imports from Malaysia, Vietnam, Thailand and Cambodia are circumventing anti-dumping and countervailing duty orders. We do not expect that this investigation will have a material impact on our business in the near term, as we have a stockpile of solar panels from a large purchase several years ago. However, the investigation and any resulting duties and tariffs imposed may disrupt the solar panel supply chain, increase the cost for solar cells and panels and ultimately impact the demand for clean energy solutions. We are monitoring the investigation closely.

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Climate Change and Effects of Seasonality

The global emphasis on climate change and reducing carbon emissions has created opportunities for our industry. Sustainability has been at the forefront of our business since its inception, and we are committed to staying at the leading edge of innovation taking place in the energy sector. We believe the next decade will be marked by dramatic changes in the power infrastructure with resources shifting to more distributed assets, storage, and microgrids to increase overall reliability and resiliency. The sustainability efforts are impacted by regulations, and changes in the regulatory climate may impact the demand for our products and offerings. See “Our business depends in part on federal, state, provincial and local government support for energy efficiency and renewable energy, and a decline in such support could harm our business” and “Compliance with environmental laws could adversely affect our operating results” in Item 1A, Risk Factors of our 2021 Annual Report.

Climate change also brings risks, as the impacts have caused us to experience more frequent and severe weather interferences, and this trend may continue. We are subject to seasonal fluctuations and construction cycles, particularly in climates that experience colder weather during the winter months, such as the northern United States and Canada, and climates that experience extreme weather events, such as wildfires, storms or flooding, or at educational institutions, where large projects are typically carried out during summer months when their facilities are unoccupied. In addition, government customers, many of which have fiscal years that do not coincide with ours, typically follow annual procurement cycles and appropriate funds on a fiscal-year basis even though contract performance may take more than one year. Further, government contracting cycles can be affected by the timing of, and delays in, the legislative process related to government programs and incentives that help drive demand for energy efficiency and renewable energy projects. As a result, our revenues and operating income in the third and fourth quarter are typically higher, and our revenues and operating income in the first quarter are typically lower, than in other quarters of the year, however, this may become harder to predict with the potential effects of climate change. As a result of such fluctuations, we may occasionally experience declines in revenues or earnings as compared to the immediately preceding quarter, and comparisons of our operating results on a period-to-period basis may not be meaningful.

Our annual and quarterly financial results are also subject to significant fluctuations as a result of other factors, many of which are outside our control.

Stock-based Compensation

During the three months ended March 31, 2022, we granted 312,500 common stock options to certain employees under our 2020 Stock Incentive Plan. As a result, our unrecognized stock-based compensation expense increased from $41.1 million at December 31, 2021 to $46.3 million at March 31, 2022 and is expected to be recognized over a weighted-average period of four years. See Note 15 “Stock-based Compensation” for additional information.

Backlog and Awarded Projects

Backlog is an important metric for us because we believe strong order backlogs indicate growing demand and a healthy business over the medium to long term, conversely, a declining backlog could imply lower demand.

The following table presents our backlog:

	As of March 31,
(In Thousands)	2022		2021
Project Backlog
Fully-contracted backlog	$	1,342,150	$	787,815
Awarded, not yet signed customer contracts	1,754,050		1,521,160
Total project backlog	$	3,096,200	$	2,308,975
12-month project backlog	$	1,154,400	$	607,000
O&M Backlog
Fully-contracted backlog	$	1,211,620	$	1,126,895
12-month O&M backlog	$	73,400	$	64,360

Our $892 million SCE Agreement was entered into in October 2021 and significantly increased our fully-contracted backlog for the three months ended March 31, 2022 as compared to the three months ended March 31, 2021. We anticipate that the SCE Agreement will be an important driver of our results in 2022.

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Total project backlog represents energy efficiency projects that are active within our sales cycle. Our sales cycle begins with the initial contact with the customer and ends, when successful, with a signed contract, also referred to as fully-contracted backlog. Our sales cycle recently has been averaging 18 to 42 months. Awarded backlog is created when a potential customer awards a project to Ameresco following a request for proposal. Once a project is awarded but not yet contracted, we typically conduct a detailed energy audit to determine the scope of the project as well as identify the savings that may be expected to be generated from upgrading the customer’s energy infrastructure. At this point, we also determine the subcontractors, what equipment will be used, and assist in arranging for third party financing, as applicable. Recently, awarded projects have been taking an average of 12 to 24 months to result in a signed contract and convert to fully-contracted backlog. It may take longer, as it depends on the size and complexity of the project. Historically, approximately 90% of our awarded backlog projects have resulted in a signed contract. After the customer and Ameresco agree to the terms of the contract and the contract is executed, the project moves to fully-contracted backlog. The contracts reflected in our fully-contracted backlog typically have a construction period of 12 to 36 months and we typically expect to recognize revenue for such contracts over the same period.

Our O&M backlog represents expected future revenues under signed multi-year customer contracts for the delivery of O&M services, primarily for energy efficiency and renewable energy construction projects completed by us for our customers.

We define our 12-month backlog as the estimated amount of revenues that we expect to recognize in the next twelve months from our fully-contracted backlog. See “We may not recognize all revenues from our backlog or receive all payments anticipated under awarded projects and customer contracts” and “In order to secure contracts for new projects, we typically face a long and variable selling cycle that requires significant resource commitments and requires a long lead time before we realize revenues” in Item 1A, Risk Factors in our 2021 Annual Report.

Assets in Development

Assets in development, which represents the potential design/build project value of small-scale renewable energy plants that have been awarded or for which we have secured development rights, were estimated at $1.3 billion and $1.1 billion at March 31, 2022 and 2021, respectively. The portion of that total related to spending for Energy as a Service assets was approximately $60.0 million and $70.0 million at March 31, 2022 and 2021, respectively. This is another important metric because it helps us gauge our future capacity to generate electricity or deliver renewable gas fuel which contributes to our recurring revenue stream.

Results of Operations

The following tables set forth certain financial data from the condensed consolidated statements of income for the periods indicated:

	Three Months Ended March 31,
	2022				2021				Year-Over-Year Change
(In Thousands)	Amount		% of Revenues		Amount		% of Revenues		Dollar Change		% Change
Revenues	$	474,002	100.0	%	$	252,202	100.0	%	$	221,800	87.9	%
Cost of revenues	405,624		85.6	%	205,293		81.4	%	200,331		97.6	%
Gross profit	68,378		14.4	%	46,909		18.6	%	21,469		45.8	%
Selling, general and administrative expenses	39,692		8.4	%	28,601		11.3	%	11,091		38.8	%
Operating income	28,686		6.1	%	18,308		7.3	%	10,378		56.7	%
Other expenses, net	7,081		1.5	%	3,672		1.5	%	3,409		92.8	%
Income before income taxes	21,605		4.6	%	14,636		5.8	%	6,969		47.6	%
Income tax (benefit) provision	2,307		0.5	%	2,205		0.9	%	102		4.6	%
Net income	19,298		4.1	%	12,431		4.9	%	$	6,867	55.2	%
Net (income) loss attributable to redeemable non-controlling interest	(1,914)		(0.4)	%	(1,257)		(0.5)	%	(657)		(52.3)	%
Net income attributable to common shareholders	$	17,384	3.7	%	$	11,174	4.4	%	$	6,210	55.6	%

All financial result comparisons made below are against the same prior year period unless otherwise noted.

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Our results of operations for the three months ended March 31, 2022 are due to the following:

•Revenues: total revenues for the three months ended March 31, 2022 increased over 2021 primarily due to a $212.7 million, or 118%, increase in our project revenues primarily attributed to the timing of revenue recognized as a result of the phase of active projects versus the prior year, including our SCE battery storage project, a $5.1 million, or 15%, increase in our energy asset revenue attributed to the continued growth of our operating portfolio, strong renewable gas production, and higher pricing on renewable identification numbers (“RINs”) generated from certain non-solar distributed generation assets in operation and a $1.8 million increase in O&M revenue.

•Cost of Revenues and Gross Profit: the increase in cost of revenues is primarily due to the increase in project revenues described above. Gross profit increased due to increased revenue, however, our gross profit as a percent of revenues decreased due to the lower margin on our SCE battery storage project.

•Selling, General and Administrative Expenses (“SG&A”): SG&A expenses for the three months ended March 31, 2022 increased over 2021 primarily due to higher net salaries and benefits of $7.3 million as a result of increased headcount and an increase in non-cash stock compensation expense. The increase is also attributed to higher miscellaneous expenses related to a settlement of an outstanding legal proceeding.

•Other Expenses, Net: Other expenses, net, includes gains and losses from derivatives transactions, foreign currency transactions, interest expense, interest income, amortization of financing costs and certain government incentives. Other expenses, net for the three months ended March 31, 2022 increased over 2021 primarily due to a loss on derivatives of $1.6 million compared to a gain of $0.4 million in the prior year and higher interest expenses of $1.7 million related to an increase in amounts outstanding on our senior secured debt facility.

•Income before Income Taxes: the increase in income before income taxes is due to reasons described above.

•Income Tax (Benefit) Provision: the provision for income taxes is based on various rates set by federal, state, provincial and local authorities and is affected by permanent and temporary differences between financial accounting and tax reporting requirements. The effective tax rate was lower in 2022 as compared to 2021 primarily due to higher investments in solar projects eligible for the investment tax credit, higher availability of the Section 179D deduction on energy improvements on government owned buildings, and higher compensation deductions related to employee stock option exercises.

•Net Income and Earnings Per Share: Net income attributable to common shareholders increased due to the reasons described above. Basic earnings per share for the three months ended March 31, 2022 was $0.34, an increase of $0.11 per share compared to the same period of 2021. Diluted earnings per share for 2022 was $0.32, a decrease of $0.10 per share compared to last year.

Business Segment Analysis

Our reportable segments for the three months ended March 31, 2022 were U.S. Regions, U.S. Federal, Canada, Non-Solar DG and All Other. On January 1, 2022, we changed the structure of our internal organization and our “All Other” segment now includes our U.S.-based enterprise energy management services previously included in our U.S Regions segment and our U.S. Regions segment now includes U.S. project revenue and associated costs previously included in our Non-Solar DG segment. As a result, previously reported amounts have been reclassified for comparative purposes. These segments do not include results of other activities, such as corporate operating expenses not specifically allocated to the segments. See Note 16 “Business Segment Information” for additional information about our segments.

Revenues

	Three Months Ended March 31,
(In Thousands)	2022		2021		Dollar Change		% Change
U.S. Regions	$	314,520	$	89,244	$	225,276	252.4	%
U.S. Federal	75,646		102,214		(26,568)		(26.0)
Canada	17,172		11,643		5,529		47.5
Non-Solar DG	29,261		25,580		3,681		14.4
All Other	37,403		23,521		13,882		59.0
Total revenues	$	474,002	$	252,202	$	221,800	87.9	%

All revenue comparisons made below relate to the three-month period and are against the same prior year period unless otherwise noted.

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•U.S. Regions: the increase is primarily due to a $222.8 million increase in project revenue attributable to the timing of revenue recognized as a result of the phase of active projects, including our SCE battery storage projects, versus the prior year, and higher energy asset revenue attributed to the growth and performance of our solar asset portfolio.

•U.S. Federal: the decrease is primarily due to a $27.9 million decrease in project revenue due to the timing of revenue recognized as a result of the phase of active projects which were impacted by supply chain delays.

•Canada: the increase is primarily due to a $5.0 million increase in project revenues attributable to the timing of revenue recognized as a result of the phase of active projects versus the prior year.

•Non-Solar DG: the increase is primarily attributed to higher energy asset revenues of $3.5 million resulting from the continued growth of our operating portfolio, increased renewable gas production levels and higher pricing on RINs generated from certain non-solar distributed generation assets in operation.

•All Other: All other revenues increased over 2021 primarily due to a $12.8 million increase in project revenues as a result of the phase of active projects versus the prior year and a $2.2 million increase in integrated-PV revenue.

Income before Taxes and Unallocated Corporate Activity

	Three Months Ended March 31,
(In Thousands)	2022		2021		Dollar Change		% Change
U.S. Regions	$	18,218	$	3,239	$	14,979	462.5	%
U.S. Federal	8,886		12,030		(3,144)		(26.1)
Canada	279		(85)		364		(428.2)
Non-Solar DG	7,422		8,772		(1,350)		(15.4)
All Other	2,709		1,645		1,064		64.7
Unallocated corporate activity	(15,909)		(10,965)		$	(4,944)	(45.1)
Income before taxes	$	21,605	$	14,636	$	6,969	47.6	%

All income before taxes and unallocated corporate activity comparisons made below relate to the three month period and are against the same prior year period unless otherwise noted.

•U.S. Regions: the increase is primarily due to the increase in revenues described above, partially offset by higher salaries and benefits and other expenses.

•U.S. Federal: the decrease is primarily due to the decrease in revenues described above.

•Canada: the increase is primarily due to the increase in revenue described above, partially offset by higher salaries and benefits.

•Non-Solar DG: the decrease is primarily due to the higher mark to market losses on derivatives and higher interest expenses.

•All Other: the increase is primarily due to the increase in revenues described above.

•Unallocated corporate activity includes all corporate level selling, general and administrative expenses and other expenses not allocated to the segments. We do not allocate any indirect expenses to the segments. Corporate activity increased primarily due to higher net salaries and benefit costs and increased professional fees, partially offset by lower interest expenses.

Liquidity and Capital Resources

Overview

Since inception, we have funded operations primarily through cash flow from operations, advances from Federal ESPC projects, our senior secured credit facility, and various forms of other debt. In addition, in March 2021, we completed an underwritten public offering of 2,875,000 shares of our Class A Common Stock, for total net proceeds of $120.1 million. See Note 7 “Debt and Financing Lease Liabilities” for additional information.

Working capital requirements, which can be susceptible to fluctuations during the year due to seasonal demands, generally result from revenue growth, our solar equipment purchase patterns, the timing of funding under various contracts, or advances from Federal ESPC projects, and payment terms for receivables and payables.

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We expect to incur additional expenditures in connection with the following activities:

•equity investments, project asset acquisitions and business acquisitions that we may fund from time to time

•capital investment in current and future energy assets

•material, equipment, and other expenditures for our SCE battery storage project, particularly during the first half of 2022

We regularly monitor and assess our ability to meet funding requirements. We believe that cash and cash equivalents, working capital and availability under our revolving senior secured credit facility, combined with our right (subject to lender consent) to increase our revolving credit facility by $100.0 million, and our general access to credit and equity markets, will be sufficient to fund our operations through at least May 2023 and thereafter. We expect to fund significant working capital expenditures for our SCE battery storage project. However, we continue to evaluate and take action, as necessary, to preserve adequate liquidity and ensure that our business can continue to operate and that we can meet our capital requirements during these uncertain times. This may include limiting discretionary spending across the organization and re-prioritizing our capital projects amid times of political unrest, the evolution of the COVID-19 pandemic, the duration of supply challenges, and the rate and duration of the inflationary pressures.

Sources of Liquidity

Senior Secured Credit Facility

On March 4, 2022, we entered into the fifth amended and restated senior secured credit facility, which increased the aggregate amount of total commitments from $245.0 million to $495.0 million. This amendment increased the aggregate amount of the revolving commitments from $180.0 million to $200.0 million, increased the existing term loan A to $75.0 million, and extended the maturity date of the revolving commitment and term loan A from June 28, 2024 to March 4, 2025. In addition, it added a delayed draw term loan A for up to $220.0 million through a September 4, 2023 maturity date, increased the total funded debt to EBITDA covenant ratio from a maximum of 3.50 to 4.50 for the quarter ended March 31, 2022; 4.25 for the quarter ending June 30, 2022, 4.00 for the quarters ending September 30, 2022 and December 31, 2022; and 3.50 thereafter. The amendment also specified the debt service coverage ratio to be less than 1.5 and increased our limit under an energy conversation project financing to $650.0 million, which provides us with flexibility to grow our federal business further. As of March 31, 2022, the balance on the senior secured term loans was $275.0 million, the balance on the senior secured revolving credit facility was $121.0 million, and we had funds available of $47.3 million.

Project Financing

We have entered into a number of construction and term loan agreements for the purpose of constructing and owning certain renewable energy plants. While we are required under generally accepted accounting principles (“GAAP”) to reflect these loans as liabilities on our consolidated balance sheets, they are generally non-recourse and not direct obligations of Ameresco, Inc. As of March 31, 2022, our construction and term loans outstanding were $237.2 million, and we had funds of $98.1 million available for borrowing under two of these non-recourse construction revolvers.

On April 29, 2022, a wholly-owned subsidiary of ours executed a joinder agreement to the 1.74% construction revolver, which added it as an additional borrower under the master construction loan agreement, and at closing, we borrowed $9.8 million for a solar and storage project.

We also utilize long-term financing facilities, accounted for as failed sale leasebacks, to finance our solar PV energy assets. During the three months ended March 31, 2022, we sold and leased back energy assets for $12.6 million in cash under our two long-term financing facilities and at March 31, 2022, approximately $231.9 million remained available under these lending commitments. This long-term financing facilities expire in June 30, 2022 and July 15, 2022.

32

Cash Flows

The following table summarizes our cash flows from operating, investing and financing activities:

	Three Months Ended March 31,
(In Thousands)	2022		2021		$ Change
Cash flows from operating activities	$	(276,122)	$	(38,724)	$	(237,398)
Cash flows from investing activities	(57,733)		(56,479)		(1,254)
Cash flows from financing activities	355,400		112,383		243,017
Effect of exchange rate changes on cash	(196)		330		(526)
Total net cash flows	$	21,349	$	17,510	$	3,839

Our service offering also includes the development, construction, and operation of small-scale renewable energy plants. Small-scale renewable energy projects, or energy assets, can either be developed for the portfolio of assets that we own and operate or designed and built for customers. Expenditures related to projects that we own are recorded as cash outflows from investing activities. Expenditures related to projects that we build for customers are recorded as cash outflows from operating activities as cost of revenues.

Cash Flows from Operating Activities

Our cash flows from operating activities decreased from last year primarily due to an increase of $160.9 million in unbilled revenue (costs and estimated earnings in excess of billings) due to the timing of when certain projects are invoiced, including our SCE battery storage project, a decrease of $57.8 million in accounts payable, accrued expenses and other current liabilities, and a $56.4 million increase in accounts receivable when compared to the prior year period.

Cash Flows from Investing Activities

During the three months ended March 31, 2022 we invested $56.8 million in purchases of energy assets compared to $55.8 million in 2021.

We currently plan to invest approximately $170 million to $220 million in additional capital expenditures during the remainder of 2022, principally for the construction or acquisition of new renewable energy plants, the majority of which we expect to fund with project finance debt.

Cash Flows from Financing Activities

Our primary sources of financing for the three months ended March 31, 2022 were gross proceeds from long-term debt of $286.7 million, net proceeds from our senior secured revolver of $76.0 million, and net proceeds received from Federal ESPC projects and energy assets of $66.7 million, partially offset by payments on long-term debt of $77.4 million.

Our primary sources of financing for the three months ended March 31, 2021 were net proceeds from our equity offering of $120.2 million, net proceeds received from Federal ESPC projects and energy assets of $33.5 million, net proceeds from long-term debt financings of $30.8 million, partially offset by net payments from our senior secured credit facility of $53.1 million, and payments on long-term debt of $19.1 million.

We currently plan additional project financings of approximately $160 million to $205 million during the remainder of 2022 to fund the construction or the acquisition of new renewable energy plants as discussed above.

Critical Accounting Policies and Estimates

Preparing our consolidated financial statements in accordance with GAAP involves us making estimates and assumptions that affect reported amounts of assets and liabilities, net sales and expenses, and related disclosures in the accompanying notes at the date of our financial statements. We base our estimates on historical experience, industry and market trends, and on various other assumptions that we believe to be reasonable under the circumstances. However, by their nature, estimates are subject to various assumptions and uncertainties, and changes in circumstances could cause actual results to differ from these estimates, sometimes materially.

33

Income Taxes

We have reviewed all tax positions taken as of March 31, 2022 and there were no additional uncertain tax positions taken during the three months ended March 31, 2022. We believe our current tax reserves are adequate to cover all known tax uncertainties.

Other than as noted above, there have been no material changes in our critical accounting estimates from those disclosed in Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations of our 2021 Form 10-K. In addition, refer to Note 2 “Summary of Significant Accounting Policies” for updates to critical accounting policies.

Recent Accounting Pronouncements

See Note 2, “Summary of Significant Accounting Policies” for a discussion of recent accounting pronouncements.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

As of March 31, 2022, there have been no significant changes in market risk exposures that materially affected the quantitative and qualitative disclosures as described in Item 7A to our 2021 Form 10-K.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our principal executive officer and principal financial officer, evaluated the effectiveness of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of the end of the period covered by this quarterly report, or the evaluation date. Disclosure controls and procedures are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Our management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives, and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Our management, after evaluating the effectiveness of our disclosure controls and procedures as of the evaluation date, concluded that as of the evaluation date, our disclosure controls and procedures were effective at a reasonable assurance level.

Changes in Internal Control over Financial Reporting

During the three months ended March 31, 2022, we implemented a new Enterprise Resource Planning (“ERP”) system. In connection with this ERP implementation, we are updating and will continue to update our internal control over financial reporting, as necessary, to accommodate modifications to our business processes and accounting procedures. We do not believe this implementation has had or will have a material adverse effect on our internal control over financial reporting.

Except as disclosed above, there were no changes in our internal control over financial reporting during our most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II - OTHER INFORMATION

Item 1. Legal Proceedings

In the ordinary conduct of our business we are subject to periodic lawsuits, investigations, and claims. Although we cannot predict with certainty the ultimate resolution of such lawsuits, investigations and claims against us, we do not believe that any currently pending or threatened legal proceedings to which we are a party will have a material adverse effect on our business, results of operations or financial condition.

For additional information about certain proceedings, please refer to Note 9, Commitments and Contingencies, to our condensed consolidated financial statements included under Part I, Item 1 of this Quarterly Report on Form 10-Q, which is incorporated into this item by reference.

Item 1A. Risk Factors

Our business is subject to numerous risks, a number of which are described below and under “Risk Factors” in Part I, Item 1A of our 2021 Annual Report.

You should carefully consider these risks together with the other information set forth in this report, which could materially affect our business, financial condition and future results. The risks described in Part I, Item 1A of our 2021 Annual Report and below are not the only risks we face. Risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially adversely affect our business, financial condition and operating results.

We may be impacted by macroeconomic conditions such as supply chain challenges, a shortfall of certain products needed for our business, and inflationary pressures.

Global trade conditions that originated during the COVID-19 pandemic continue to persist and have been exacerbated by the war in Ukraine. These conditions may also have long-lasting adverse impact on us and our industries independently of the progress of the pandemic. For example, pandemic-related issues have exacerbated port congestion and intermittent supplier shutdowns and delays, resulting in additional expenses to expedite delivery of critical equipment. These conditions, combined with an increased demand for certain products needed for our business, such as lithium-ion battery cells and solar panels has created a shortfall of and increased costs for these products, which has caused challenges and delays in our projects and may impact the profitability of our projects. We cannot predict the duration or direction of current global trends or their sustained impact. If we experience unfavorable global market conditions, our business, prospects, financial condition, and operating results may be harmed.

The loss of SCE, which is one of our most significant customers, or our failure to perform on our contract with SCE in accordance with its terms could adversely affect us.

We expect that a material portion of our revenue for 2022 will be generated from the SCE Agreement. The SCE Agreement and related purchase orders obligate us to achieve certain substantial completion milestone dates (as they may be extended) for the facilities no later than August 1, 2022, and for at least two years thereafter meet specified availability and capacity guarantees. As a result of COVID-19 shutdowns and newly implemented Chinese transportation safety policies resulting in delays in the batteries needed for the project, we have provided a force majeure notice to SCE. Certain events, such as delays due to COVID-19 constitute force majeure events under the SCE Agreement and, subject to the party that is claiming a force majeure event being in compliance with its obligations, allows for the extension of the August 1, 2022 completion date. The SCE Agreement also requires us to expend significant capital, and if we are unable to fund such capital needs on acceptable terms, on a timely basis, or at all, this could adversely impact the construction timeline under the agreement. If we fail to satisfy certain milestone obligations, fail to come to an agreement with SCE of appropriate extensions of these milestones or fail to meet the availability and capacity guarantees, we may be subject to liquidated damages and under certain circumstances SCE may have a right to terminate the agreement. The requirement to pay liquidated damages or the loss of business from SCE could have a material adverse effect on our reputation, business or results of operations.

Our business depends in part on federal, state, provincial, and local government support for energy efficiency and renewable energy, and a decline in such support or the imposition of additional taxes, tariffs, duties or other assessments on renewable energy or the equipment necessary to generate or deliver it, could harm our business.

We depend in part on legislation and government policies that support energy efficiency and renewable energy projects that enhance the economic feasibility of our energy efficiency services and small-scale renewable energy projects. This support includes legislation and regulations that authorize and regulate the manner in which certain governmental entities do business with us; encourage or subsidize governmental procurement of our services; encourage or in some cases require other customers to procure power from renewable or low-emission sources, to reduce their electricity use or otherwise to procure our services; and

35

provide us with tax and other incentives that reduce our costs or increase our revenues. In addition, the U.S. government generally has not taken action to materially burden the international supply chain, which has been important to the development of renewable energy facilities at acceptable prices. Any reductions or modifications to, or the elimination of, governmental incentives or policies that support renewable energy or the imposition of additional taxes, tariffs, duties or other assessments on renewable energy or the equipment necessary to generate or deliver it, such as antidumping and countervailing duty rates that could be put in place as a result of the U.S. Department of Commerce's investigation into an antidumping and countervailing duties circumvention claim on solar cells and panels supplied from Malaysia, Vietnam, Thailand and Cambodia could result in, among other things, the lack of a satisfactory market for the development and/or financing of renewable energy projects, or adversely impact our ability to complete projects for existing customers and obtain project commitments from new customers. Due to the uncertainty in the regulatory and legislative processes, we cannot determine the effect any such legislation and regulation may have on our products and operations

Failure of third parties to manufacture quality products or provide reliable services in a timely manner or at prices that are acceptable to us could cause delays in the delivery of our services and completion of our projects, which could damage our reputation, have a negative impact on our relationships with our customers and adversely affect our growth.

Our success depends on our ability to provide services and complete projects in a timely manner, which in part depends on the ability of third parties to provide us with timely and reliable products and services at acceptable prices. In providing our services and completing our projects, we rely on products that meet our design specifications and components manufactured and supplied by third parties, as well as on services performed by subcontractors. We also rely on subcontractors to perform substantially all of the construction and installation work related to our projects; and we often need to engage subcontractors with whom we have no experience for our projects. We, our subcontractors and other third parties have been impacted by the global supply chain delays as well as quarantine and other restrictions imposed because of the COVID-19 pandemic. This has resulted in and may continue to result in delays in our ability to provide our services and complete our projects in a timely manner. In addition, some of the third parties we engage for our design, construction and operation projects operate internationally and our reliance on their products and services may be impacted by economic, political, and labor conditions in those regions as well as the uncertainty caused by the evolving relations between the United States and these regions, including China.

For example, we are dependent on the continued supply of lithium-ion battery cells for our energy storage products, and we will require substantially more cells to grow our battery storage business based on our current plans. Currently, we rely on limited number of suppliers for these cells. Any disruption in the supply of battery cells from our suppliers could limit our growth for projects involving battery energy storage. In addition, the cost and mass production of battery cells, depends in part upon the prices and availability of raw materials such as lithium, nickel, cobalt and/or other metals. The prices for these materials fluctuate and their available supply may be unstable, depending on market conditions and global demand for these materials. As a result of increased global production of energy storage products and electric vehicles, suppliers of these raw materials may be unable to meet our volume or timing needs. Any reduced availability of these materials may adversely impact our access to battery cells and our growth, and any increases in their prices may reduce our profitability if we cannot recoup such costs in our project pricing. Moreover, our inability to meet demand may harm our brand, growth, prospects and operating results.

If any of our subcontractors are unable to provide services that meet or exceed our customers’ expectations or satisfy our contractual commitments, our reputation, business and operating results could be harmed. In addition, if we are unable to avail ourselves of warranty and other contractual protections with providers of products and services, we may incur liability to our customers or additional costs related to the affected products and components, which could have a material adverse effect on our business, financial condition, and operating results. Moreover, any delays, malfunctions, inefficiencies, or interruptions in these products or services could adversely affect the quality and performance of our solutions and require considerable expense to establish alternate sources for such products and services. This could cause us to experience difficulty retaining current customers and attracting new customers, and could harm our brand, reputation, growth, and operating results.

Item 2. Unregistered Sales of Equity and Use of Proceeds

Stock Repurchase Program

We did not repurchase any shares of our common stock under our stock repurchase program authorized by the Board of Directors on April 27, 2016 (the “Repurchase Program”) during the three months ended March 31, 2022. Under the Repurchase Program, we are authorized to repurchase up to $17.6 million of our Class A common stock. As of March 31, 2022, there were shares having a dollar value of approximately $5.9 million that may yet be purchased under the Repurchase Program.

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Item 6. Exhibits

Exhibit Index

Exhibit Number	Description
10.1	Fifth Amended and Restated Credit Agreement dated as of March 4, 2022 among Ameresco, Inc., certain of its subsidiaries, the lenders (as defined therein), BOFA Securities, Inc. as sole lead arranger and sole bookrunner and Bank of America, N.A. as administrative agent. Filed as Exhibit 10.1 to our Current Report on Form 8-K dated March 4, 2022 and filed with the Commission on March 4, 2022 (file no. 001-34811) and incorporated herein by reference.
31.1*	Principal Executive Officer Certification required by Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Principal Financial Officer Certification required by Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Certifications pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101*	The following condensed consolidated financial statements from Ameresco, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2022, formatted in Inline XBRL (Extensible Business Reporting Language): (i) Condensed Consolidated Balance Sheets (ii) Condensed Consolidated Statements of Income, (iii) Condensed Consolidated Statements of Comprehensive Income, (iv) Condensed Consolidated Statement of Changes in Redeemable Non-Controlling Interests and Stockholders’ Equity, (v) Condensed Consolidated Statements of Cash Flows, and (vi) Notes to Condensed Consolidated Financial Statements.
104*	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)
	*Filed herewith.
	**Furnished herewith.

37

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.

		AMERESCO, INC.
Date:	May 3, 2022	By:	/s/ Spencer Doran Hole
			Spencer Doran Hole
			Senior Vice President and Chief Financial Officer (duly authorized and principal financial officer)

38

EX-31.1

Exhibit 31.1

PRINCIPAL EXECUTIVE OFFICER CERTIFICATION

I, George P. Sakellaris, certify that:

1.	I have reviewed this Quarterly Report on Form 10-Q of Ameresco, Inc. (the “Registrant”);
2.	Based on my knowledge, this 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 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 report;
4.	The Registrant’s other certifying officer 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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) 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 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 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.

Date: May 3, 2022	/s/ George P. Sakellaris
	George P. Sakellaris
	President and Chief Executive Officer (principal executive officer)

EX-31.2

Exhibit 31.2

PRINCIPAL FINANCIAL OFFICER CERTIFICATION

I, Spencer Doran Hole, certify that:

1.	I have reviewed this Quarterly Report on Form 10-Q of Ameresco, Inc. (the “Registrant”);
2.	Based on my knowledge, this 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 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 report;
4.	The Registrant’s other certifying officer 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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) 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 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 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.

Date: May 3, 2022	/s/ Spencer Doran Hole
	Spencer Doran Hole
	Senior Vice President and Chief Financial Officer (duly authorized and principal financial officer)

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 Ameresco, Inc. (the “Company”) to which this certification is attached and as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers of the Company hereby certifies, pursuant to Rule 13a-14(b) and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)	The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; 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: May 3, 2022		/s/ George P. Sakellaris
		George P. Sakellaris
		President and Chief Executive Officer (principal executive officer)
Date: May 3, 2022		/s/ Spencer Doran Hole
		Spencer Doran Hole
		Senior Vice President and Chief Financial Officer (duly authorized and principal financial officer)

XML

Cover Page - shares	3 Months Ended
	Mar. 31, 2022	Apr. 29, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-34811
Entity Registrant Name	Ameresco, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-3512838
Entity Address, Address Line One	111 Speen Street
Entity Address, Address Line Two	Suite 410
Entity Address, City or Town	Framingham
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01701
City Area Code	508
Local Phone Number	661-2200
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001488139
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false
Class A Common Stock
Entity Information [Line Items]
Security Exchange Name	NYSE
Title of 12(b) Security	Class A Common Stock, $0.0001 par value per share
Trading Symbol	AMRC
Entity Common Stock, Shares Outstanding (in shares)		33,808,964
Class B Common Stock
Entity Information [Line Items]
Security Exchange Name	NYSE
Title of 12(b) Security	Class B Common Stock, $0.0001 par value per share
Entity Common Stock, Shares Outstanding (in shares)		18,000,000
No Trading Symbol Flag	true

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	[1]	$ 68,288	$ 50,450
Restricted cash	[1]	26,792	24,267
Accounts receivable, net of allowance of $2,265 and $2,266, respectively	[1]	204,082	161,970
Accounts receivable retainage, net		40,555	43,067
Costs and estimated earnings in excess of billings	[1]	460,240	306,172
Inventory, net		9,720	8,807
Prepaid expenses and other current assets	[1]	19,025	25,377
Income tax receivable		4,337	5,261
Project development costs		12,162	13,214
Total current assets	[1]	845,201	638,585
Federal ESPC receivable		605,871	557,669
Property and equipment, net	[1]	13,063	13,117
Energy assets, net	[1]	908,006	856,531
Deferred income tax assets, net		3,722	3,703
Goodwill, net		71,334	71,157
Intangible assets, net		5,974	6,961
Operating lease assets	[1]	39,485	41,982
Restricted cash, net of current portion	[1]	13,323	12,337
Other assets	[1]	24,591	22,779
Total assets	[1]	2,530,570	2,224,821
Current liabilities:
Current portions of long-term debt and financing lease liabilities	[1]	80,191	78,934
Accounts payable	[1]	231,533	308,963
Accrued expenses and other current liabilities	[1]	43,784	43,311
Current portions of operating lease liabilities	[1]	6,134	6,276
Billings in excess of cost and estimated earnings		31,729	35,918
Income taxes payable		1,771	822
Total current liabilities	[1]	395,142	474,224
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	[1]	659,695	377,184
Federal ESPC liabilities		600,507	532,287
Deferred income tax liabilities, net		6,063	3,871
Deferred grant income		8,379	8,498
Long-term operating lease liabilities, net of current portion	[1]	32,854	35,135
Other liabilities	[1]	44,282	43,176
Commitments and contingencies (Note 9)
Redeemable non-controlling interests, net		47,438	46,182
Stockholders’ equity:
Preferred stock, $0.0001 par value, 5,000,000 shares authorized, no shares issued and outstanding at March 31, 2022 and December 31, 2021		0	0
Additional paid-in capital		289,459	283,982
Retained earnings		456,088	438,732
Accumulated other comprehensive loss, net		(3,889)	(6,667)
Treasury stock, at cost, 2,101,795 shares at March 31, 2022 and December 31, 2021		(11,788)	(11,788)
Stockholders’ equity before non-controlling interest		729,875	704,264
Non-controlling interest		6,335	0
Total stockholders’ equity		736,210	704,264
Total liabilities, redeemable non-controlling interests and stockholders’ equity		2,530,570	2,224,821
Class A Common Stock
Stockholders’ equity:
Common stock		3	3
Class B Common Stock
Stockholders’ equity:
Common stock		$ 2	$ 2

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at March 31, 2022 and December 31, 2021 of $136,315 and $124,454, respectively. Includes non-recourse liabilities of consolidated VIEs at March 31, 2022 and December 31, 2021 of $30,790 and $31,125, respectively. See Note 12.

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Accounts receivable, allowance for credit loss, current		$ 2,265	$ 2,266
Total assets	[1]	$ 2,530,570	$ 2,224,821
Preferred stock, par value (in usd per share)		$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)		5,000,000	5,000,000
Preferred stock, shares issued (in shares)		0	0
Preferred stock, shares outstanding (in shares)		0	0
Treasury stock, shares (in shares)		2,101,795	2,101,795
Class A Common Stock
Common stock, par value (in usd per share)		$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)		500,000,000	500,000,000
Common stock, shares issued (in shares)		35,910,759	35,818,104
Common stock, shares outstanding (in shares)		33,808,964	33,716,309
Class B Common Stock
Common stock, par value (in usd per share)		$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)		144,000,000	144,000,000
Common stock, shares issued (in shares)		18,000,000	18,000,000
Common stock, shares outstanding (in shares)		18,000,000	18,000,000
Variable Interest Entity, Primary Beneficiary
Total assets		$ 136,315	$ 124,454
Total liabilities		$ 30,790	$ 31,125

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at March 31, 2022 and December 31, 2021 of $136,315 and $124,454, respectively. Includes non-recourse liabilities of consolidated VIEs at March 31, 2022 and December 31, 2021 of $30,790 and $31,125, respectively. See Note 12.

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Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenues	$ 474,002	$ 252,202
Cost of revenues	405,624	205,293
Gross profit	68,378	46,909
Selling, general and administrative expenses	39,692	28,601
Operating income	28,686	18,308
Other expenses, net	7,081	3,672
Income before income taxes	21,605	14,636
Income tax provision	2,307	2,205
Net income	19,298	12,431
Net income attributable to redeemable non-controlling interests	(1,914)	(1,257)
Net income attributable to common shareholders	$ 17,384	$ 11,174
Net income per share attributable to common shareholders:
Basic (in usd per share)	$ 0.34	$ 0.23
Diluted (in usd per share)	$ 0.32	$ 0.22
Weighted average common shares outstanding:
Basic (in shares)	51,744	48,975
Diluted (in shares)	53,636	50,357

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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 19,298	$ 12,431
Other comprehensive income (loss):
Unrealized gain from interest rate hedges, net of tax effect of $917 and $719	2,711	2,118
Foreign currency translation adjustments	67	413
Total other comprehensive income	2,778	2,531
Comprehensive income	22,076	14,962
Comprehensive income attributable to redeemable non-controlling interests	(1,914)	(1,257)
Comprehensive income attributable to common shareholders	$ 20,162	$ 13,705

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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) from interest rate hedges, tax effect	$ 917	$ 719

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Condensed Consolidated Statements of Changes in Redeemable Non-Controlling Interests and Stockholders' Equity - USD ($) $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Non-controlling Interest
Redeemable non-controlling interests, beginning balance at Dec. 31, 2020	$ 38,850
Increase (Decrease) in Temporary Equity [Roll Forward]
Tax equity financing fees	(17)
Distributions to redeemable non-controlling interests	(453)
Accretion of tax equity financing fees	31
Net income	1,257
Redeemable non-controlling interests, ending balance at Mar. 31, 2021	39,668
Beginning balance (in shares) at Dec. 31, 2020				30,224,654	18,000,000				(2,101,795)
Beginning balance at Dec. 31, 2020	492,813			$ 3	$ 2	$ 145,496	$ 368,390	$ (9,290)	$ (11,788)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity offering cost adjustment (in shares)				2,875,000
Equity offering cost adjustment	120,216					120,216
Exercise of stock options (in shares)				166,271
Exercise of stock options	1,386					1,386
Stock-based compensation expense	766					766
Unrealized gain (loss) from interest rate hedges, net	2,118							2,118
Foreign currency translation adjustment	413							413
Accretion of tax equity financing fees	(31)						(31)
Net income	11,174						11,174
Ending balance (in shares) at Mar. 31, 2021				33,265,925	18,000,000				(2,101,795)
Ending balance at Mar. 31, 2021	628,855			$ 3	$ 2	267,864	379,533	(6,759)	$ (11,788)	0
Redeemable non-controlling interests, beginning balance at Dec. 31, 2021	46,182
Increase (Decrease) in Temporary Equity [Roll Forward]
Distributions to redeemable non-controlling interests	(448)
Accretion of tax equity financing fees	28
Investment fund call option exercise	(238)
Net income	1,914
Redeemable non-controlling interests, ending balance at Mar. 31, 2022	47,438
Beginning balance (in shares) at Dec. 31, 2021		33,716,309	18,000,000	33,716,309	18,000,000				(2,101,795)
Beginning balance at Dec. 31, 2021	704,264			$ 3	$ 2	283,982	438,732	(6,667)	$ (11,788)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity offering cost adjustment (in shares)				92,655
Exercise of stock options	1,708					1,708
Stock-based compensation expense	3,531					3,531
Unrealized gain (loss) from interest rate hedges, net	2,711							2,711
Foreign currency translation adjustment	67							67
Accretion of tax equity financing fees	(28)						(28)
Investment fund call option exercise	238					238
Contributions from non-controlling interest	6,335									6,335
Net income	17,384						17,384
Ending balance (in shares) at Mar. 31, 2022		33,808,964	18,000,000	33,808,964	18,000,000				(2,101,795)
Ending balance at Mar. 31, 2022	$ 736,210			$ 3	$ 2	$ 289,459	$ 456,088	$ (3,889)	$ (11,788)	$ 6,335

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Condensed Consolidated Statements of Changes in Redeemable Non-Controlling Interests and Stockholders' Equity (Parenthetical) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Statement of Stockholders' Equity [Abstract]
Equity offering, offering costs	$ 6,284

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 19,298	$ 12,431
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation of energy assets, net	11,806	9,686
Depreciation of property and equipment	734	833
Gain on contingent consideration	(320)	0
Accretion of ARO liabilities	36	24
Amortization of debt discount and debt issuance costs	852	747
Amortization of intangible assets	578	80
Provision for bad debts	237	3
Equity in (earnings) loss of unconsolidated entity	(637)	62
Net loss (gain) from derivatives	1,622	(377)
Stock-based compensation expense	3,531	766
Deferred income taxes, net	1,284	1,410
Unrealized foreign exchange loss	132	19
Changes in operating assets and liabilities:
Accounts receivable	(40,859)	15,535
Accounts receivable retainage	2,582	(1,844)
Federal ESPC receivable	(46,300)	(65,973)
Inventory, net	(914)	48
Costs and estimated earnings in excess of billings	(154,325)	6,544
Prepaid expenses and other current assets	2,813	(726)
Project development costs	1,260	1,259
Other assets	105	(600)
Accounts payable, accrued expenses and other current liabilities	(77,163)	(19,333)
Billings in excess of cost and estimated earnings	(4,309)	(3,973)
Other liabilities	(33)	(226)
Income taxes receivable, net	1,868	4,881
Cash flows from operating activities	(276,122)	(38,724)
Cash flows from investing activities:
Purchases of property and equipment	(889)	(656)
Capital investment in energy assets	(56,844)	(55,823)
Cash flows from investing activities	(57,733)	(56,479)
Cash flows from financing activities:
Proceeds from equity offering, net of offering costs	0	120,216
Payments of debt discount and debt issuance costs	(2,570)	(850)
Proceeds from exercises of options and ESPP	1,708	1,386
Proceeds from (payments on) senior secured revolving credit facility, net	76,000	(53,073)
Proceeds from long-term debt financings	286,744	30,811
Proceeds from Federal ESPC projects	64,788	33,520
Proceeds for (payments on) energy assets from Federal ESPC	1,925	(59)
Contributions from non-controlling interest	4,594	0
Distributions to redeemable non-controlling interests, net	(357)	(495)
Payments on long-term debt and financing leases	(77,432)	(19,073)
Cash flows from financing activities	355,400	112,383
Effect of exchange rate changes on cash	(196)	330
Net increase in cash, cash equivalents, and restricted cash	21,349	17,510
Cash, cash equivalents, and restricted cash, beginning of period	87,054	98,837
Cash, cash equivalents, and restricted cash, end of period	108,403	116,347
Supplemental disclosures of cash flow information:
Cash paid for interest	4,488	4,235
Cash paid for income taxes	78	271
Accrued purchases of energy assets	$ 40,683	$ 33,065

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Basis of Presentation

3 Months Ended

Mar. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

BASIS OF PRESENTATION

The accompanying condensed consolidated financial statements of Ameresco, Inc. (including its subsidiaries, the “Company,” “Ameresco,” “we,” “our,” or “us”) are unaudited, according to certain rules and regulations of the Securities and Exchange Commission, and include, in our opinion, normal recurring adjustments necessary for a fair presentation in conformity with accounting principles generally accepted in the United States (“GAAP”) of the results for the periods indicated.

The results of operations for the three months ended March 31, 2022 are not necessarily indicative of results which may be expected for the full year. The December 31, 2021 consolidated balance sheet data was derived from audited financial statements, but certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. The interim condensed consolidated financial statements and accompanying notes should be read in conjunction with the audited consolidated financial statements and accompanying notes for the year ended December 31, 2021, included in our annual report on Form 10-K (“2021 Annual Report” or “2021 Form 10-K”) for the year ended December 31, 2021 filed with the Securities and Exchange Commission on March 1, 2022.

Reclassification

Certain prior period amounts were reclassified to conform to the presentation in the current period.

Significant Risks and Uncertainties

The COVID-19 pandemic has continued to result in global supply chain disruptions and the resurgence of COVID-19 and its variants has caused some governments to extend travel and other restrictions.

We have considered the impact of COVID-19 on the assumptions and estimates used, which may change in response to this evolving situation. Results of future operations and liquidity could be adversely impacted by a number of factors associated with the COVID-19 pandemic including payments of outstanding receivable amounts beyond normal payment terms, supply chain disruptions, potential loss of employees due to vaccine mandates, and uncertain demand. As of the date of issuance of these condensed consolidated financial statements, we cannot reasonably estimate the extent to which the COVID-19 pandemic may impact our financial condition, liquidity, or results of operations in the foreseeable future. The ultimate impact of the pandemic on us is highly uncertain and will depend on future developments, and such impacts could exist for an extended period of time, even after the pandemic subsides.

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Our accounting policies are set forth in Note 2 to the consolidated financial statements contained in our 2021 Form 10-K. We have included certain updates to those policies below.

Accounts Receivable and Allowance for Credit Losses

Changes in the allowance for credit losses are as follows:

	March 31, 2022		March 31, 2021
Allowance for credit losses, beginning of period	$	2,263	$	2,266
Provision for bad debts	237		3
Account write-offs and other	(235)		41
Allowance for credit losses, end of period	$	2,265	$	2,310

Recent Accounting Pronouncements

Reference Rate Reform

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ASU 2020-04, which provides optional guidance 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. Companies can apply the ASU immediately, however, the guidance will only be available until December 31, 2022. We are currently evaluating the impact

that adopting this new accounting standard would have on our condensed consolidated financial statements and related disclosures.

In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope. The amendments in ASU 2021-01 provide optional expedients to the current guidance on contract modification and hedge accounting from the expected market transition from LIBOR and other interbank offered rates to alternative reference rates. The guidance generally can be applied to applicable contract modifications through December 31, 2022. We are currently evaluating the impact that adopting this new accounting standard would have on our condensed consolidated financial statements and related disclosures.

Government Assistance

In November 2021, the FASB issued ASU 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance, Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which requires annual disclosures about certain types of government assistance received. ASU 2021-10 is effective for our fiscal year beginning after December 15, 2021. We adopted this guidance as of January 1, 2022 and the adoption did not have an impact on our consolidated financial statements.

Derivatives and Hedging

In March 2022, the FASB issued ASU 2022-01, Derivatives and Hedging (Topic 815): Fair Value Hedging—Portfolio Layer Method, which expands the current single-layer method to allow multiple hedged layers of a single closed portfolio to be hedged under the method. ASU 2022-01 is effective for our year ending beginning after December 15, 2022. We are currently evaluating the impact that adopting this new accounting standard would have on our consolidated financial statements.

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Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

REVENUE FROM CONTRACTS WITH CUSTOMERS

Disaggregation of Revenue

Our reportable segments for the three months ended March 31, 2022 were U.S. Regions, U.S. Federal, Canada, Non-Solar Distributed Generation (“Non-Solar DG”) and All Other. On January 1, 2022, we changed the structure of our internal organization and our “All Other” segment now includes our U.S.-based enterprise energy management services previously included in our U.S Regions segment and our U.S. Regions segment now includes U.S. project revenue and associated costs previously included in our Non-Solar DG segment. As a result, previously reported amounts have been reclassified for comparative purposes.

The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended March 31, 2022:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Project revenue	$	298,632	$	62,217	$	13,951	$	—	$	18,604	$	393,404
O&M revenue	5,080		12,297		11		2,774		91		20,253
Energy assets	10,018		1,090		761		26,487		72		38,428
Integrated-PV	—		—		—		—		11,356		11,356
Other	790		42		2,449		—		7,280		10,561
Total revenues	$	314,520	$	75,646	$	17,172	$	29,261	$	37,403	$	474,002

The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended March 31, 2021:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Project revenue	$	75,812	$	90,089	$	9,001	$	—	$	5,791	$	180,693
O&M revenue	4,415		11,440		26		2,532		71		18,484
Energy assets	8,802		664		747		22,939		135		33,287
Integrated-PV	—		—		—		—		9,154		9,154
Other	215		21		1,869		109		8,370		10,584
Total revenues	$	89,244	$	102,214	$	11,643	$	25,580	$	23,521	$	252,202

The following table presents information related to our revenue recognized over time:

	Three Months Ended March 31,
	2022	2021
Percentage of revenue recognized over time	96%	94%

The remainder of our revenue is for products and services transferred at a point in time, at which point revenue is recognized.

We attribute revenues to customers based on the location of the customer. The following table presents information related to our revenues by geographic area:

	Three Months Ended March 31,
	2022		2021
United States	$	438,391	$	234,009
Canada	15,988		10,853
Other	19,623		7,340
Total revenues	$	474,002	$	252,202

Contract Balances

The following tables provide information about receivables, contract assets and contract liabilities from contracts with customers:

	March 31, 2022		December 31, 2021
Accounts receivable, net	$	204,082	$	161,970
Accounts receivable retainage, net	$	40,555	$	43,067
Contract Assets:
Costs and estimated earnings in excess of billings	$	460,240	$	306,172
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	31,729	$	35,918
Billings in excess of cost and estimated earnings, non-current (1)	6,322		6,481
Total contract liabilities	$	38,051	$	42,399

	March 31, 2021		December 31, 2020
Accounts receivable, net	$	113,095	$	125,010
Accounts receivable retainage, net	$	32,071	$	30,189
Contract Assets:
Costs and estimated earnings in excess of billings	$	179,474	$	185,960
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	30,211	$	33,984
Billings in excess of cost and estimated earnings, non-current (1)	6,590		6,631
Total contract liabilities	$	36,801	$	40,615
(1) Performance obligations that are expected to be completed beyond the next twelve months and are included in other liabilities in the condensed consolidated balance sheets.

The increase in contract assets for the three months ended March 31, 2022 was primarily due to revenue recognized of $381,949 offset by billings of $229,540. Contract assets also increased due to reclassifications, primarily from contract liabilities as a result of timing of customer payments. The decrease in contract liabilities was primarily driven by recognition of revenue as performance obligations were satisfied exceeding increases from the receipt of advance payment from customers, and related billings. For the three months ended March 31, 2022, we recognized revenue of $33,077 that was previously included in the beginning balance of contract liabilities and billed customers $23,723. Changes in contract liabilities are also driven by reclassifications to or from contract assets as a result of timing of customer payments.

The decrease in contract assets for the three months ended March 31, 2021 was primarily due to billings of approximately $144,539, partially offset by revenue recognized of $130,297. The decrease in contract liabilities was primarily driven by the receipt of advance payment from customers, and related billings, exceeding reductions from the recognition of revenue as performance obligations were satisfied. For the three months ended March 31, 2021, we recognized revenue of $45,483 that was previously included in the beginning balance of contract liabilities and billed customers $33,081. Changes in contract liabilities are also driven by reclassifications to or from contract assets as a result of timing of customer payments.

Performance Obligations

Our remaining performance obligations (“backlog”) represent the unrecognized revenue value of our contract commitments. At March 31, 2022, we had contracted backlog of $2,553,770 of which approximately 48% is anticipated to be recognized as revenue in the next twelve months. The remaining performance obligations primarily relate to the energy efficiency and renewable energy

construction projects, including long-term operations and maintenance (“O&M”) services related to these projects. The long-term services have varying initial contract terms, up to 25 years.

Project Development Costs

Project development costs of $4,209 and $1,985 were recognized in the condensed consolidated statements of income on projects that converted to customer contracts during the three months ended March 31, 2022 and 2021, respectively.

No impairment charges in connection with our project development costs were recorded during the three months ended March 31, 2022 and 2021.

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Goodwill and Intangible Assets, Net

3 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets, Net

GOODWILL AND INTANGIBLE ASSETS, NET

The changes in the carrying value of goodwill balances by reportable segment were as follows:

	U.S. Regions		U.S. Federal		Canada		Non-solar DG		Other		Total
Balance, December 31, 2021	$	39,204	$	3,981	$	3,454	$	—	$	24,518	$	71,157
Remeasurement adjustment	309		—		—		—		—		309
Currency effects	—		—		53		—		(185)		(132)
Balance, March 31, 2022	$	39,513	$	3,981	$	3,507	$	—	$	24,333	$	71,334

Definite-lived intangible assets, net consisted of the following:

	As of March 31, 2022		As of December 31, 2021
Gross carrying amount	$	32,939	33,526
Less - accumulated amortization	(26,965)		(26,565)
Intangible assets, net	$	5,974	$	6,961

The table below sets forth amortization expense:

		Three Months Ended March 31,
Asset type	Location	2022		2021
Customer contracts	Cost of revenues	$	184	$	—
All other intangible assets	Selling, general and administrative expenses	394		80
Total amortization expense		$	578	$	80

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Energy Assets, Net

3 Months Ended

Mar. 31, 2022

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Energy Assets, Net

ENERGY ASSETS, NETEnergy assets, net consisted of the following:

	March 31, 2022		December 31, 2021
Energy assets (1)	$	1,184,314	$	1,120,712
Less - accumulated depreciation and amortization	(276,308)		(264,181)
Energy assets, net	$	908,006	$	856,531
(1) Includes financing lease assets (see Note 6), capitalized interest and Asset retirement obligations (“ARO”) assets (see tables below).

The following table sets forth our depreciation and amortization expense on energy assets, net of deferred grant amortization:

	Three Months Ended March 31,
Location	2022		2021
Cost of revenues (2)	$	11,806	$	9,686
(2) Includes depreciation and amortization on financing lease assets (see Note 6).

The following table presents the interest costs relating to construction financing during the period of construction, which were capitalized as part of energy assets, net:

	Three Months Ended March 31,
	2022		2021
Capitalized interest	$	1,312	$	2,238

The following tables sets forth information related to our ARO assets and ARO liabilities:

	Location	March 31, 2022		December 31, 2021
ARO assets, net	Energy assets, net	$	2,473	$	1,939
ARO liabilities, current	Accrued expenses and other current liabilities	$	9	$	6
ARO liabilities, non-current	Other liabilities	2,947		2,342
Total ARO liabilities		$	2,956	$	2,348

	Three Months Ended March 31,
	2022		2021
Depreciation expense of ARO assets	$	37	$	23
Accretion expense of ARO liabilities	$	36	$	24

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Leases

3 Months Ended

Mar. 31, 2022

Leases [Abstract]

Leases

LEASES

The table below sets forth supplemental condensed consolidated balance sheet information related to our leases:

	March 31, 2022			December 31, 2021
Operating Leases:
Operating lease assets	$	39,485		$	41,982
Current portions of operating lease liabilities	$	6,134		$	6,276
Long-term portions of operating lease liabilities	32,854			35,135
Total operating lease liabilities	$	38,988		$	41,411
Weighted-average remaining lease term	12 years			12 years
Weighted-average discount rate	5.7		%	5.7		%
Financing Leases:
Energy assets	$	31,521		$	31,876
Current portions of financing lease liabilities	$	3,226		$	3,125
Long-term financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	15,973			16,101
Total financing lease liabilities	$	19,199		$	19,226
Weighted-average remaining lease term	15 years			15 years
Weighted-average discount rate	12.1		%	12.1		%

The costs related to our leases were as follows:

	Three Months Ended March 31,
	2022		2021
Operating Leases:
Operating lease costs	$	2,291	$	2,153
Financing Leases:
Amortization expense	355		532
Interest on lease liabilities	559		658
Total lease costs	$	3,205	$	3,343

Supplemental cash flow information related to our leases was as follows:

	Three Months Ended March 31,
	2022		2021
Cash paid for amounts included in the measurement of operating lease liabilities	$	1,907	$	2,423
Right-of-use assets (“ROU”) obtained in exchange for new operating lease liabilities	$	367	$	3,773

The table below sets forth our estimated minimum future lease obligations under our leases:

	Operating Leases		Financing Leases
Year ended December 31,
2022	$	6,134	$	5,124
2023	7,176		3,676
2024	5,943		2,565
2025	4,725		2,213
2026	2,880		2,054
Thereafter	28,615		19,813
Total minimum lease payments	55,473		35,445
Less: interest	16,485		16,246
Present value of lease liabilities	$	38,988	$	19,199

Sale-leasebacks

In March 2022, we entered into an amendment to our August 2018 long-term financing facility which extended the end date of the agreement from March 31, 2022 to June 30, 2022. We sold and leased back two energy assets for $8,201 in cash proceeds under this agreement during the three months ended March 31, 2022. As of March 31, 2022, approximately $220,367 remained available under this lending commitment.

In March 2022, we entered into an amendment to our December 2020 long-term financing facility which extended the end date of the agreement from December 31, 2021 to July 15, 2022. We sold and leased back one energy asset for $4,423 in cash proceeds under this facility during three months ended March 31, 2022. As of March 31, 2022, approximately $11,515 remained available under this lending commitment.

These transactions are accounted for as failed sale leasebacks and are classified as long-term financing facilities. See Note 7 for additional information.

Net gains from amortization expense recognized in cost of revenues relating to deferred gains and losses in connection with our sale-leaseback agreements were $57 for each of the three months ended March 31, 2022 and 2021

Leases

LEASES

The table below sets forth supplemental condensed consolidated balance sheet information related to our leases:

	March 31, 2022			December 31, 2021
Operating Leases:
Operating lease assets	$	39,485		$	41,982
Current portions of operating lease liabilities	$	6,134		$	6,276
Long-term portions of operating lease liabilities	32,854			35,135
Total operating lease liabilities	$	38,988		$	41,411
Weighted-average remaining lease term	12 years			12 years
Weighted-average discount rate	5.7		%	5.7		%
Financing Leases:
Energy assets	$	31,521		$	31,876
Current portions of financing lease liabilities	$	3,226		$	3,125
Long-term financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	15,973			16,101
Total financing lease liabilities	$	19,199		$	19,226
Weighted-average remaining lease term	15 years			15 years
Weighted-average discount rate	12.1		%	12.1		%

The costs related to our leases were as follows:

	Three Months Ended March 31,
	2022		2021
Operating Leases:
Operating lease costs	$	2,291	$	2,153
Financing Leases:
Amortization expense	355		532
Interest on lease liabilities	559		658
Total lease costs	$	3,205	$	3,343

Supplemental cash flow information related to our leases was as follows:

	Three Months Ended March 31,
	2022		2021
Cash paid for amounts included in the measurement of operating lease liabilities	$	1,907	$	2,423
Right-of-use assets (“ROU”) obtained in exchange for new operating lease liabilities	$	367	$	3,773

The table below sets forth our estimated minimum future lease obligations under our leases:

	Operating Leases		Financing Leases
Year ended December 31,
2022	$	6,134	$	5,124
2023	7,176		3,676
2024	5,943		2,565
2025	4,725		2,213
2026	2,880		2,054
Thereafter	28,615		19,813
Total minimum lease payments	55,473		35,445
Less: interest	16,485		16,246
Present value of lease liabilities	$	38,988	$	19,199

Sale-leasebacks

In March 2022, we entered into an amendment to our August 2018 long-term financing facility which extended the end date of the agreement from March 31, 2022 to June 30, 2022. We sold and leased back two energy assets for $8,201 in cash proceeds under this agreement during the three months ended March 31, 2022. As of March 31, 2022, approximately $220,367 remained available under this lending commitment.

In March 2022, we entered into an amendment to our December 2020 long-term financing facility which extended the end date of the agreement from December 31, 2021 to July 15, 2022. We sold and leased back one energy asset for $4,423 in cash proceeds under this facility during three months ended March 31, 2022. As of March 31, 2022, approximately $11,515 remained available under this lending commitment.

These transactions are accounted for as failed sale leasebacks and are classified as long-term financing facilities. See Note 7 for additional information.

Net gains from amortization expense recognized in cost of revenues relating to deferred gains and losses in connection with our sale-leaseback agreements were $57 for each of the three months ended March 31, 2022 and 2021

Leases

LEASES

The table below sets forth supplemental condensed consolidated balance sheet information related to our leases:

	March 31, 2022			December 31, 2021
Operating Leases:
Operating lease assets	$	39,485		$	41,982
Current portions of operating lease liabilities	$	6,134		$	6,276
Long-term portions of operating lease liabilities	32,854			35,135
Total operating lease liabilities	$	38,988		$	41,411
Weighted-average remaining lease term	12 years			12 years
Weighted-average discount rate	5.7		%	5.7		%
Financing Leases:
Energy assets	$	31,521		$	31,876
Current portions of financing lease liabilities	$	3,226		$	3,125
Long-term financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	15,973			16,101
Total financing lease liabilities	$	19,199		$	19,226
Weighted-average remaining lease term	15 years			15 years
Weighted-average discount rate	12.1		%	12.1		%

The costs related to our leases were as follows:

	Three Months Ended March 31,
	2022		2021
Operating Leases:
Operating lease costs	$	2,291	$	2,153
Financing Leases:
Amortization expense	355		532
Interest on lease liabilities	559		658
Total lease costs	$	3,205	$	3,343

Supplemental cash flow information related to our leases was as follows:

	Three Months Ended March 31,
	2022		2021
Cash paid for amounts included in the measurement of operating lease liabilities	$	1,907	$	2,423
Right-of-use assets (“ROU”) obtained in exchange for new operating lease liabilities	$	367	$	3,773

The table below sets forth our estimated minimum future lease obligations under our leases:

	Operating Leases		Financing Leases
Year ended December 31,
2022	$	6,134	$	5,124
2023	7,176		3,676
2024	5,943		2,565
2025	4,725		2,213
2026	2,880		2,054
Thereafter	28,615		19,813
Total minimum lease payments	55,473		35,445
Less: interest	16,485		16,246
Present value of lease liabilities	$	38,988	$	19,199

Sale-leasebacks

In March 2022, we entered into an amendment to our August 2018 long-term financing facility which extended the end date of the agreement from March 31, 2022 to June 30, 2022. We sold and leased back two energy assets for $8,201 in cash proceeds under this agreement during the three months ended March 31, 2022. As of March 31, 2022, approximately $220,367 remained available under this lending commitment.

In March 2022, we entered into an amendment to our December 2020 long-term financing facility which extended the end date of the agreement from December 31, 2021 to July 15, 2022. We sold and leased back one energy asset for $4,423 in cash proceeds under this facility during three months ended March 31, 2022. As of March 31, 2022, approximately $11,515 remained available under this lending commitment.

These transactions are accounted for as failed sale leasebacks and are classified as long-term financing facilities. See Note 7 for additional information.

Net gains from amortization expense recognized in cost of revenues relating to deferred gains and losses in connection with our sale-leaseback agreements were $57 for each of the three months ended March 31, 2022 and 2021

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Debt and Financing Lease Liabilities

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

Debt and Financing Lease Liabilities

DEBT AND FINANCING LEASE LIABILITIES

Our debt and financing lease liabilities comprised of the following:

	March 31, 2022		December 31, 2021
Senior secured revolving credit facility (1)	$	121,000	$	45,000
Senior secured term loans	275,000		52,813
Non-recourse construction revolvers	31,910		31,698
Non-recourse term loans (4)	205,329		218,136
Long-term financing facilities (2)	104,417		104,615
Financing lease liabilities (3)	19,199		19,226
Total debt and financing lease liabilities	756,855		471,488
Less: current maturities	80,191		78,934
Less: unamortized discount and debt issuance costs	16,969		15,370
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	$	659,695	$	377,184
(1) At March 31, 2022, funds of $47,341 were available for borrowing under this facility.
(2) These facilities are sale-leaseback arrangements and are accounted for as failed sales. See Note 6 for additional disclosures.
(3) Financing lease liabilities are sale-leaseback arrangements under previous guidance. See Note 6 for additional disclosures.
(4) As of March 31, 2021, we were in default on one non-recourse term loan with a balance of $3,809 for failure to meet the debt service coverage ratio of 1 to 1, however, a waiver was received in April 2022.

Senior Secured Credit Facility - Revolver and Term Loans

On March 4, 2022, we entered into the fifth amended and restated senior secured credit facility with five banks, which included the following amendments:

•increased the aggregate amount of total commitments from $245,000 to $495,000,

•increased the aggregate amount of the revolving commitments from $180,000 to $200,000,

•increased the existing term loan A from $65,000 to $75,000,

•extended the maturity date of the revolving commitment and term loan A from June 28, 2024 to March 4, 2025,

•added a delayed draw term loan A for up to $220,000 through a September 4, 2023 maturity date,

•increased the total funded debt to EBITDA covenant ratio from a maximum of 3.50 to 4.50 for the quarter ended March 31, 2022; 4.25 for the quarter ending June 30, 2022, 4.00 for the quarters ending September 30, 2022 and December 31, 2022; and 3.50 thereafter,

•specified the debt service coverage ratio (the ratio of (a) cash flow of the core Ameresco companies, to (b) debt service of the core Ameresco companies as of the end of each fiscal quarter to be less than 1.5, and

•increased our limit under an energy conversation project financing to $650,000, which provides us with flexibility to grow our federal business further.

The revolving credit facility may be increased by an amount up to an additional $100,000 in increments of at least $25,000 at the approval of the lenders, subject to certain conditions.

We accounted for this amendment as a modification and at closing we incurred $2,048 in lenders fees which were reflected as debt discount and $352 in third party fees which were reflected as debt issuance costs. The unamortized debt discount and issuance costs of the previous agreement are being amortized over the remaining term of the amended agreement, with the exception of $96 of costs relating to a previous syndicated lender which did not participate in this amendment. These costs were expensed in other expenses, net during the three months ended March 31, 2022.

Construction Revolvers

Construction Revolver, 1.74%, due June 2022

In March 2022, we entered into a fourth amendment to the 1.74% construction revolver to extend this facility from March 2022 to June 2022. All remaining unpaid amounts outstanding under the facility are due at that time. As of March 31, 2022, $73,946 was available for borrowing under this facility.

On April 29, 2022, a wholly-owned subsidiary of ours executed a joinder agreement to the 1.74% construction revolver, which added it as an additional borrower under the master construction loan agreement. At closing, we borrowed $9,800 for a solar and storage project.

Construction Revolver, 1.99%, due July 2022

As of March 31, 2022, $24,145 was available for borrowing under the 1.74% construction revolver.

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Income Taxes

3 Months Ended

Mar. 31, 2022

Income Tax Disclosure [Abstract]

Income Taxes

INCOME TAXES

We recorded a provision for income taxes of $2,307 and $2,205 for the three months ended March 31, 2022 and 2021, respectively. The estimated effective annualized tax rate impacted by the period discrete items is a provision of 10.7% for the three months ended March 31, 2022, compared to a provision of 15.1% of estimated effective annualized tax rate for the three months ended March 31, 2021.

The principal reasons for the difference between the statutory rate and the estimated annual effective rate for 2022 were the effects of investment tax credits which we are entitled from solar plants placed into service or are forecasted to be placed into service during 2022, state taxes, and the tax deductions related to the Section 179D deduction.

The principal reasons for the difference between the statutory rate and the estimated annual effective rate for 2021 were the effects of investment tax credits which we are entitled from solar plants placed into service or are forecasted placed into service during 2021, the tax deductions related to the Section 179D deduction, the deduction of compensation expense associated with certain employee stock options, and tax basis adjustments on certain partnership flip transactions.

Under GAAP accounting rules deferred taxes are shown on a net basis in the condensed consolidated financial statements based on taxing jurisdiction. Under the guidance, we have recorded long term deferred tax assets and deferred tax liabilities based on the underlying jurisdiction in the accompanying condensed consolidated balance sheets.

The following table sets forth the total amounts of gross unrecognized tax benefits:

	Gross Unrecognized Tax Benefits
Balance, December 31, 2021	$	900
Balance, March 31, 2022	$	900

The amount of unrecognized tax benefits that, if recognized, would favorably affect the effective income tax rate in any future periods was $440 at March 31, 2022 and December 31, 2021 (net of the federal benefit on state amounts).

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

From time to time, we issue letters of credit and performance bonds with our third-party lenders, to provide collateral.

Legal Proceedings

On November 6, 2017, we were served with a complaint filed by a customer against nine contractors, including us, claiming both physical damages to the customer’s tangible property and damages caused by various alleged defects in the design of the project through negligent acts and/or omissions, breaches of contract and breaches of the “implied warranty of good and workmanlike manner.” During the three months ended March 31, 2022, we entered into a settlement agreement and adjusted our accrual for the actual net loss after taking into account our insurance proceeds, which is included in accrued expenses and other current liabilities in our condensed consolidated balance sheets as of March 31, 2022. In addition, we reversed the loss recovery from insurance proceeds.

We are involved in a variety of other claims and other legal proceedings generally incidental to our normal business activities. While the outcome of any of these proceedings cannot be accurately predicted, we do not believe the ultimate resolution of any of these existing matters would have a material adverse effect on our financial condition or results of operations.

Commitment as a Result of an Acquisition

In August 2018, we completed an acquisition which provided for a revenue earn-out contingent upon the acquired business meeting certain cumulative revenue targets over 5 years from the acquisition date. The fair value decreased from $678 at December 31, 2021 to $358 at March 31, 2022 and is included in other liabilities on the condensed consolidated balance sheets. The contingent consideration will be paid annually in May, if any of the cumulative revenue targets are achieved. No payments have been made to date.

In December 2021, we completed our acquisition of Plug Smart which provided for an earn-out based on future EBITDA targets beginning with EBITDA performance for the month of December 2021 and each fiscal year thereafter, over a five-year period through December 31, 2026. The maximum cumulative earn-out is $5,000 and we evaluated financial forecasts of the acquired business and concluded that the fair value of this earn-out was approximately $2,160 upon acquisition and remained consistent as of December 31, 2021. At March 31, 2022, the fair value of the contingent consideration was $2,061 and is included in other liabilities on the consolidated balance sheets. No payments have been made to date.

See note 10 for additional information.

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Fair Value Measurement

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Fair Value Measurement

FAIR VALUE MEASUREMENT

We recognize our financial assets and liabilities at fair value on a recurring basis. Fair value is defined as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Three levels of inputs that may be used to measure fair value are as follows:

Level 1: Inputs are based on unadjusted quoted prices for identical instruments traded in active markets. 

Level 2: Inputs are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. 

Level 3: Inputs are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. The fair values are therefore determined using model-based techniques that include option pricing models, discounted cash flow models, and similar techniques. 

The following table presents the input level used to determine the fair values of our financial instruments measured at fair value on a recurring basis:

		Fair Value as of
	Level	March 31, 2022		December 31, 2021
Assets:
Interest rate swap instruments	2	$	2,220	$	919
Total assets		$	2,220	$	919
Liabilities:
Interest rate swap instruments	2	$	2,726	$	6,316
Commodity swap instruments	2	4,568		1,962
Make-whole provisions	2	5,085		4,800
Contingent consideration	3	2,419		2,838
Total liabilities		$	14,798	$	15,916

The following table sets forth a summary of changes in the fair value of contingent consideration liability classified as level 3:

	Year Ended December 31,
	March 31, 2022		December 31, 2021
Contingent consideration liability balance at the beginning of period	$	2,838	$	678
Contingent consideration issued in connection with acquisition	—		2,160
Changes in fair value included in earnings	(320)		—
Remeasurement adjustment	(99)		—
Contingent consideration liability balance at the end of period	$	2,419	$	2,838

The following table sets forth the fair value and the carrying value of our long-term debt, excluding financing leases:

	As of March 31, 2022				As of December 31, 2021
	Fair Value		Carrying Value		Fair Value		Carrying Value
Long-term debt (Level 2)	$	726,649	$	720,687	$	442,429	$	436,892

The fair value of our long-term debt was estimated using discounted cash flows analysis, based on our current incremental borrowing rates for similar types of borrowing arrangements which are considered to be level two inputs. There have been no transfers in or out of level two or three financial instruments for the three months ended March 31, 2022 and the year ended December 31, 2021.

We are also required to periodically measure certain other assets at fair value on a nonrecurring basis, including long-lived assets, goodwill and other intangible assets. We calculated the fair value used in our annual goodwill impairment analysis utilizing a discounted cash flow analysis and determined that the inputs used were level 3 inputs. There were no assets recorded at fair value on a non-recurring basis as of March 31, 2022 or December 31, 2021.

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Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

The following table presents information about the fair value amounts of our cash flow derivative instruments:  

		Derivatives as of
		March 31, 2022		December 31, 2021
	Balance Sheet Location	Fair Value		Fair Value
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other assets	$	39	$	—
Interest rate swap contracts	Other liabilities	$	2,726	$	6,316
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other assets	$	2,181	$	919
Commodity swap contracts	Other liabilities	$	4,568	$	1,962
Make-whole provisions	Other liabilities	$	5,085	$	4,800

As of March 31, 2022 and December 31, 2021, all but four of our freestanding derivatives were designated as hedging instruments.

The following table presents information about the effects of our derivative instruments on our condensed consolidated statements of income and condensed consolidated statements of comprehensive income:

		Amount of Loss (Gain) Recognized in Net Income
	Location of Loss (Gain) Recognized in Net Income	Three Months Ended March 31,
		2022		2021
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	481	$	523
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	(1,262)	$	(1,323)
Commodity swap contracts	Other expenses, net	$	2,606	$	248
Make-whole provisions	Other expenses, net	$	278	$	697

The following table presents the changes in Accumulated Other Comprehensive Income (“AOCI”), net of taxes, from our hedging instruments:

	Three Months Ended March 31, 2022
Derivatives Designated as Hedging Instruments:
Accumulated loss in AOCI at the beginning of the period	$	(4,733)
Unrealized gain recognized in AOCI	2,230
Loss reclassified from AOCI to other expenses, net	481
Net gain on derivatives	2,711
Accumulated loss in AOCI at the end of the period	$	(2,022)

The following tables present all of our active derivative instruments as of March 31, 2022:

Active Interest Rate Swaps	Effective Date	Expiration Date	Initial Notional Amount ($)		Status
11-Year, 5.77% Fixed	October 2018	October 2029	$	9,200	Designated
15-Year, 5.24% Fixed	June 2018	June 2033	$	10,000	Designated
10-Year, 4.74% Fixed	June 2017	December 2027	$	14,100	Designated
15-Year, 3.26% Fixed	February 2023	December 2038	$	14,084	Designated
7-Year, 2.19% Fixed	February 2016	February 2023	$	20,746	Designated
8-Year, 3.70% Fixed	March 2020	June 2028	$	14,643	Designated
8-Year, 3.70% Fixed	March 2020	June 2028	$	10,734	Designated
13-Year, 0.93% Fixed	May 2020	March 2033	$	9,505	Not Designated
13-Year, 0.93% Fixed	May 2020	March 2033	$	6,968	Not Designated
15.5-Year, 5.40% Fixed	September 2008	March 2024	$	13,081	Designated
2.75-Year, 0.41% Fixed	December 2020	September 2023	$	26,250	Not Designated

Active Commodity Swaps	Effective Date	Expiration Date	Initial Notional Amount (Volume)	Commodity Measurement	Status
3.5-Year, $2.65 MMBtu Fixed	December 2020	June 2024	3,296,160	MMBtus	Not Designated

Other Derivatives	Classification	Effective Date	Expiration Date	Fair Value ($)
Make-whole provisions	Liability	June/August 2018	December 2038	$	583
Make-whole provisions	Liability	August 2016	April 2031	$	77
Make-whole provisions	Liability	April 2017	February 2034	$	72
Make-whole provisions	Liability	November 2020	December 2027	$	56
Make-whole provisions	Liability	October 2011	May 2028	$	12
Make-whole provisions	Liability	May 2021	April 2045	$	319
Make-whole provisions	Liability	July 2021	March 2046	$	3,966

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Variable Interest Entities And Equity Method Investments

3 Months Ended

Mar. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Variable Interest Entities And Equity Method Investments

VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS

Variable Interest Entities

The table below presents a summary of amounts related to our consolidated investment funds and joint venture, which we determined meet the definition of a variable interest entity (“VIE”), as of:

	March 31,		December 31,
	2022 (1)		2021 (1)
Cash and cash equivalents	$	5,434	$	4,915
Restricted cash	776		822
Accounts receivable, net	790		656
Costs and estimated earnings in excess of billings	1,884		1,421
Prepaid expenses and other current assets	159		151
Total VIE current assets	9,043		7,965
Property and equipment, net	1,266		1,266
Energy assets, net	119,310		108,498
Operating lease assets	6,225		6,271
Restricted cash, net of current portion	435		418
Other assets	36		36
Total VIE assets	$	136,315	$	124,454
Current portions of long-term debt and financing lease liabilities	$	2,196	$	2,210
Accounts payable	94		47
Accrued expenses and other current liabilities	548		643
Current portions of operating lease liabilities	147		142
Total VIE current liabilities	2,985		3,042
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	20,499		20,952
Long-term operating lease liabilities, net of current portion	6,630		6,558
Other liabilities	676		573
Total VIE liabilities	$	30,790	$	31,125
(1) The amounts in the above table are reflected in Note 1 on our condensed consolidated balance sheets.

See Note 13 for additional information on the call and put options related to our investment funds.

Non-controlling Interest

Non-controlling interest represents the equity owned by the other joint venture member of a consolidated joint venture. During the three months ended March 31, 2022, the other joint venture member contributed $6,335 to this joint venture which was formed for a specific project. The project did not generate any earnings or losses during the three months ended March 31, 2022.

Equity Method Investments

Unconsolidated joint ventures are accounted for under the equity method. For these unconsolidated joint ventures, our investment balances are included in other assets on the condensed consolidated balance sheets and our pro rata share of net income or loss is included in operating income.

The following table provides information about our equity method investments in joint ventures:

	As of
	March 31, 2022		December 31, 2021
Equity method investments	$	9,839	$	9,206
	Three Months Ended March 31,
	March 31, 2022		March 31, 2021
Earnings (loss) recognized	$	637	$	(62)

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Redeemable Non-controlling Interests

3 Months Ended

Mar. 31, 2022

Noncontrolling Interest [Abstract]

Redeemable Non-controlling Interests

REDEEMABLE NON-CONTROLLING INTERESTS

Our subsidiaries with membership interests in the investment funds we formed have the right to elect to require the non-controlling interest holder to sell all of its membership units to our subsidiaries, a call option. Our investment funds also include rights for the non-controlling interest holder to elect to require our subsidiaries to purchase all of the non-controlling membership interests in the fund, a put option.

The call options are exercisable beginning on the date that specified conditions are met for each respective fund. The put options for the investment funds are exercisable beginning on the date that specified conditions are met for each respective fund.

We initially record our redeemable non-controlling interests at fair value on the date of acquisition and subsequently adjust to redemption value. At both March 31, 2022 and December 31, 2021 redeemable non-controlling interests were reported at their carrying values, as the carrying value at each reporting period was greater than the estimated redemption value.

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Earnings Per Share

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

Earnings Per Share

The following is a reconciliation of the numerator and denominator for the computation of basic and diluted earnings per share:

	Three Months Ended March 31,
(In thousands, except per share data)	2022		2021
Numerator:
Net income attributable to common shareholders	$	17,384	$	11,174
Adjustment for accretion of tax equity financing fees	(28)		(31)
Income attributable to common shareholders	$	17,356	$	11,143
Denominator:
Basic weighted-average shares outstanding	51,744		48,975
Effect of dilutive securities:
Stock options	1,892		1,382
Diluted weighted-average shares outstanding	53,636		50,357
Net income per share attributable to common shareholders:
Basic	$	0.34	$	0.23
Diluted	$	0.32	$	0.22
Potentially dilutive shares (1)	783		1,157
(1) Potentially dilutive shares attributable to stock options were excluded from the computation of diluted earnings per share as the effect would have been anti-dilutive.

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Stock-Based Compensation

3 Months Ended

Mar. 31, 2022

Share-based Payment Arrangement [Abstract]

Stock-Based Compensation

STOCK-BASED COMPENSATION

We recorded stock-based compensation expense, including expense related to our employee stock purchase plan, as follows:

	Three Months Ended March 31,
	2022		2021
Stock-based compensation expense	$	3,531	$	766

Our stock-based compensation expense is included in selling, general and administrative expenses in the condensed consolidated statements of income. As of March 31, 2022, there was $46,295 of unrecognized compensation expense related to non-vested stock option awards that is expected to be recognized over a weighted-average period of 4.0 years.

Stock Option Grants

During the three months ended March 31, 2022, we granted 313 common stock options to certain employees under our 2020 Stock Incentive Plan, which have a contractual life of ten years and vest over a five-year period. We did not grant awards to individuals who were not either an employee or director of ours during the three months ended March 31, 2022 and 2021.

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Business Segment Information

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Business Segment Information

BUSINESS SEGMENT INFORMATIONOur reportable segments for the three months ended March 31, 2022 were U.S. Regions, U.S. Federal, Canada, Non-Solar DG and All Other. On January 1, 2022, we changed the structure of our internal organization and our “All Other” segment now includes our U.S.-based enterprise energy management services previously included in our U.S Regions segment and our U.S. Regions segment now includes U.S. project revenue and associated costs previously included in our Non-Solar DG segment. As a result, previously reported amounts have been reclassified for comparative purposes.

Our U.S. Regions, U.S. Federal and Canada segments offer energy efficiency products and services which include the design, engineering and installation of equipment and other measures to improve the efficiency and control the operation of a facility’s energy infrastructure, renewable energy solutions and services and the development and construction of small-scale plants that Ameresco owns or develops for customers that produce electricity, gas, heat or cooling from renewable sources of energy and O&M services.

Our Non-Solar DG segment sells electricity, processed renewable gas fuel, heat or cooling, produced from renewable sources of energy, other than solar, and generated by small-scale plants that we own and O&M services for customer-owned small-scale plants.

The “All Other” category includes enterprise energy management services, other than the U.S.-based portion; consulting services, energy efficiency products and services outside of the U.S. and Canada; and the sale of solar PV energy products and systems which we refer to as integrated-PV.

These segments do not include results of other activities, such as corporate operating expenses not specifically allocated to the segments. Certain reportable segments are an aggregation of operating segments.

The tables below present our business segment information recast for the prior-year period and a reconciliation to the condensed consolidated financial statements:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total Consolidated
Three Months Ended March 31, 2022
Revenues	$	314,520	$	75,646	$	17,172	$	29,261	$	37,403	$	474,002
Loss on derivatives	227		51		—		1,344		—		1,622
Interest expense, net of interest income	1,642		306		222		1,790		(7)		3,953
Depreciation and amortization of intangible assets	5,278		1,245		447		5,416		271		12,657
Unallocated corporate activity	—		—		—		—		—		(15,909)
Income before taxes, excluding unallocated corporate activity	18,218		8,886		279		7,422		2,709		37,514
Three Months Ended March 31, 2021
Revenues	$	89,244	$	102,214	$	11,643	$	25,580	$	23,521	$	252,202
Loss (gain) on derivatives	532		—		179		(1,074)		—		(363)
Interest expense, net of interest income	1,443		321		207		610		159		2,740
Depreciation and amortization of intangible assets	3,486		1,010		415		4,862		377		10,150
Unallocated corporate activity	—		—		—		—		—		(10,965)
Income before taxes, excluding unallocated corporate activity	3,239		12,030		(85)		8,772		1,645		25,601

See Note 3 for additional information about our revenues by product line.

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Other Expenses, Net

3 Months Ended

Mar. 31, 2022

Other Income and Expenses [Abstract]

Other Expenses, Net

OTHER EXPENSES, NET

The following table presents the components of other expenses, net:

	Three Months Ended March 31,
	2022		2021
Loss (gain) on derivatives	$	1,622	$	(377)
Interest expense, net of interest income	4,489		2,805
Amortization of debt discount and debt issuance costs	852		747
Foreign currency transaction loss	116		495
Government incentives	2		2
Other expenses, net	$	7,081	$	3,672

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Subsequent Event	3 Months Ended
	Mar. 31, 2022
Subsequent Events [Abstract]
Subsequent Event	SUBSEQUENT EVENTIn April 2022, we entered into a binding Framework Agreement Term Sheet with a battery manufacturer for the purchase and sale of battery energy storage (“BESS”) equipment for our BESS projects at committed amounts and agreed upon delivery dates for a period of several years. The purchase and sale commitment covers BESS equipment to be used for our BESS projects. In connection with entering into the term sheet, we agreed to pay a $10,000 deposit, which will be credited against our future equipment purchases.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Basis of Presentation

BASIS OF PRESENTATIONThe accompanying condensed consolidated financial statements of Ameresco, Inc. (including its subsidiaries, the “Company,” “Ameresco,” “we,” “our,” or “us”) are unaudited, according to certain rules and regulations of the Securities and Exchange Commission, and include, in our opinion, normal recurring adjustments necessary for a fair presentation in conformity with accounting principles generally accepted in the United States (“GAAP”) of the results for the periods indicated.

Reclassification

Reclassification

Certain prior period amounts were reclassified to conform to the presentation in the current period.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Reference Rate Reform

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ASU 2020-04, which provides optional guidance 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. Companies can apply the ASU immediately, however, the guidance will only be available until December 31, 2022. We are currently evaluating the impact

that adopting this new accounting standard would have on our condensed consolidated financial statements and related disclosures.

In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope. The amendments in ASU 2021-01 provide optional expedients to the current guidance on contract modification and hedge accounting from the expected market transition from LIBOR and other interbank offered rates to alternative reference rates. The guidance generally can be applied to applicable contract modifications through December 31, 2022. We are currently evaluating the impact that adopting this new accounting standard would have on our condensed consolidated financial statements and related disclosures.

Government Assistance

In November 2021, the FASB issued ASU 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance, Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which requires annual disclosures about certain types of government assistance received. ASU 2021-10 is effective for our fiscal year beginning after December 15, 2021. We adopted this guidance as of January 1, 2022 and the adoption did not have an impact on our consolidated financial statements.

Derivatives and Hedging

In March 2022, the FASB issued ASU 2022-01, Derivatives and Hedging (Topic 815): Fair Value Hedging—Portfolio Layer Method, which expands the current single-layer method to allow multiple hedged layers of a single closed portfolio to be hedged under the method. ASU 2022-01 is effective for our year ending beginning after December 15, 2022. We are currently evaluating the impact that adopting this new accounting standard would have on our consolidated financial statements.

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Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Summary of Accounts Receivable, Allowance for Credit Loss

Changes in the allowance for credit losses are as follows:

	March 31, 2022		March 31, 2021
Allowance for credit losses, beginning of period	$	2,263	$	2,266
Provision for bad debts	237		3
Account write-offs and other	(235)		41
Allowance for credit losses, end of period	$	2,265	$	2,310

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Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Summary of Disaggregation of Revenue

The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended March 31, 2022:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Project revenue	$	298,632	$	62,217	$	13,951	$	—	$	18,604	$	393,404
O&M revenue	5,080		12,297		11		2,774		91		20,253
Energy assets	10,018		1,090		761		26,487		72		38,428
Integrated-PV	—		—		—		—		11,356		11,356
Other	790		42		2,449		—		7,280		10,561
Total revenues	$	314,520	$	75,646	$	17,172	$	29,261	$	37,403	$	474,002

The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended March 31, 2021:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Project revenue	$	75,812	$	90,089	$	9,001	$	—	$	5,791	$	180,693
O&M revenue	4,415		11,440		26		2,532		71		18,484
Energy assets	8,802		664		747		22,939		135		33,287
Integrated-PV	—		—		—		—		9,154		9,154
Other	215		21		1,869		109		8,370		10,584
Total revenues	$	89,244	$	102,214	$	11,643	$	25,580	$	23,521	$	252,202

The following table presents information related to our revenue recognized over time:

	Three Months Ended March 31,
	2022	2021
Percentage of revenue recognized over time	96%	94%

The remainder of our revenue is for products and services transferred at a point in time, at which point revenue is recognized.

We attribute revenues to customers based on the location of the customer. The following table presents information related to our revenues by geographic area:

	Three Months Ended March 31,
	2022		2021
United States	$	438,391	$	234,009
Canada	15,988		10,853
Other	19,623		7,340
Total revenues	$	474,002	$	252,202

Summary of Contract with Customer, Asset and Liability

The following tables provide information about receivables, contract assets and contract liabilities from contracts with customers:

	March 31, 2022		December 31, 2021
Accounts receivable, net	$	204,082	$	161,970
Accounts receivable retainage, net	$	40,555	$	43,067
Contract Assets:
Costs and estimated earnings in excess of billings	$	460,240	$	306,172
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	31,729	$	35,918
Billings in excess of cost and estimated earnings, non-current (1)	6,322		6,481
Total contract liabilities	$	38,051	$	42,399

	March 31, 2021		December 31, 2020
Accounts receivable, net	$	113,095	$	125,010
Accounts receivable retainage, net	$	32,071	$	30,189
Contract Assets:
Costs and estimated earnings in excess of billings	$	179,474	$	185,960
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	30,211	$	33,984
Billings in excess of cost and estimated earnings, non-current (1)	6,590		6,631
Total contract liabilities	$	36,801	$	40,615
(1) Performance obligations that are expected to be completed beyond the next twelve months and are included in other liabilities in the condensed consolidated balance sheets.

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Goodwill and Intangible Assets, Net (Tables)

3 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Carrying Value of Goodwill Attributable to Each Reportable Segment

The changes in the carrying value of goodwill balances by reportable segment were as follows:

	U.S. Regions		U.S. Federal		Canada		Non-solar DG		Other		Total
Balance, December 31, 2021	$	39,204	$	3,981	$	3,454	$	—	$	24,518	$	71,157
Remeasurement adjustment	309		—		—		—		—		309
Currency effects	—		—		53		—		(185)		(132)
Balance, March 31, 2022	$	39,513	$	3,981	$	3,507	$	—	$	24,333	$	71,334

Schedule of Gross Carrying Amount and Accumulated Amortization of Intangible Assets

Definite-lived intangible assets, net consisted of the following:

	As of March 31, 2022		As of December 31, 2021
Gross carrying amount	$	32,939	33,526
Less - accumulated amortization	(26,965)		(26,565)
Intangible assets, net	$	5,974	$	6,961

Schedule of Amortization Expense

The table below sets forth amortization expense:

		Three Months Ended March 31,
Asset type	Location	2022		2021
Customer contracts	Cost of revenues	$	184	$	—
All other intangible assets	Selling, general and administrative expenses	394		80
Total amortization expense		$	578	$	80

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Energy Assets, Net (Tables)

3 Months Ended

Mar. 31, 2022

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Energy Assets

Energy assets, net consisted of the following:

	March 31, 2022		December 31, 2021
Energy assets (1)	$	1,184,314	$	1,120,712
Less - accumulated depreciation and amortization	(276,308)		(264,181)
Energy assets, net	$	908,006	$	856,531
(1) Includes financing lease assets (see Note 6), capitalized interest and Asset retirement obligations (“ARO”) assets (see tables below).

Schedule of Depreciation and Amortization Expense of Energy Assets

The following table sets forth our depreciation and amortization expense on energy assets, net of deferred grant amortization:

	Three Months Ended March 31,
Location	2022		2021
Cost of revenues (2)	$	11,806	$	9,686
(2) Includes depreciation and amortization on financing lease assets (see Note 6).

Schedule of Capitalized Interest

The following table presents the interest costs relating to construction financing during the period of construction, which were capitalized as part of energy assets, net:

	Three Months Ended March 31,
	2022		2021
Capitalized interest	$	1,312	$	2,238

Schedule Of Asset And Liabilities Retirement Obligations

The following tables sets forth information related to our ARO assets and ARO liabilities:

	Location	March 31, 2022		December 31, 2021
ARO assets, net	Energy assets, net	$	2,473	$	1,939
ARO liabilities, current	Accrued expenses and other current liabilities	$	9	$	6
ARO liabilities, non-current	Other liabilities	2,947		2,342
Total ARO liabilities		$	2,956	$	2,348

	Three Months Ended March 31,
	2022		2021
Depreciation expense of ARO assets	$	37	$	23
Accretion expense of ARO liabilities	$	36	$	24

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Leases (Tables)

3 Months Ended

Mar. 31, 2022

Leases [Abstract]

Schedule of Assets and Liabilities, Lessee

The table below sets forth supplemental condensed consolidated balance sheet information related to our leases:

	March 31, 2022			December 31, 2021
Operating Leases:
Operating lease assets	$	39,485		$	41,982
Current portions of operating lease liabilities	$	6,134		$	6,276
Long-term portions of operating lease liabilities	32,854			35,135
Total operating lease liabilities	$	38,988		$	41,411
Weighted-average remaining lease term	12 years			12 years
Weighted-average discount rate	5.7		%	5.7		%
Financing Leases:
Energy assets	$	31,521		$	31,876
Current portions of financing lease liabilities	$	3,226		$	3,125
Long-term financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	15,973			16,101
Total financing lease liabilities	$	19,199		$	19,226
Weighted-average remaining lease term	15 years			15 years
Weighted-average discount rate	12.1		%	12.1		%

Schedule of Other Lease Cost Details

The costs related to our leases were as follows:

	Three Months Ended March 31,
	2022		2021
Operating Leases:
Operating lease costs	$	2,291	$	2,153
Financing Leases:
Amortization expense	355		532
Interest on lease liabilities	559		658
Total lease costs	$	3,205	$	3,343

Supplemental cash flow information related to our leases was as follows:

	Three Months Ended March 31,
	2022		2021
Cash paid for amounts included in the measurement of operating lease liabilities	$	1,907	$	2,423
Right-of-use assets (“ROU”) obtained in exchange for new operating lease liabilities	$	367	$	3,773

Schedule of Operating Lease Liability Maturity

The table below sets forth our estimated minimum future lease obligations under our leases:

	Operating Leases		Financing Leases
Year ended December 31,
2022	$	6,134	$	5,124
2023	7,176		3,676
2024	5,943		2,565
2025	4,725		2,213
2026	2,880		2,054
Thereafter	28,615		19,813
Total minimum lease payments	55,473		35,445
Less: interest	16,485		16,246
Present value of lease liabilities	$	38,988	$	19,199

Schedule of Finance Lease Liability Maturity

The table below sets forth our estimated minimum future lease obligations under our leases:

	Operating Leases		Financing Leases
Year ended December 31,
2022	$	6,134	$	5,124
2023	7,176		3,676
2024	5,943		2,565
2025	4,725		2,213
2026	2,880		2,054
Thereafter	28,615		19,813
Total minimum lease payments	55,473		35,445
Less: interest	16,485		16,246
Present value of lease liabilities	$	38,988	$	19,199

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Debt and Financing Lease Liabilities (Tables)

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Our debt and financing lease liabilities comprised of the following:

	March 31, 2022		December 31, 2021
Senior secured revolving credit facility (1)	$	121,000	$	45,000
Senior secured term loans	275,000		52,813
Non-recourse construction revolvers	31,910		31,698
Non-recourse term loans (4)	205,329		218,136
Long-term financing facilities (2)	104,417		104,615
Financing lease liabilities (3)	19,199		19,226
Total debt and financing lease liabilities	756,855		471,488
Less: current maturities	80,191		78,934
Less: unamortized discount and debt issuance costs	16,969		15,370
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	$	659,695	$	377,184
(1) At March 31, 2022, funds of $47,341 were available for borrowing under this facility.
(2) These facilities are sale-leaseback arrangements and are accounted for as failed sales. See Note 6 for additional disclosures.
(3) Financing lease liabilities are sale-leaseback arrangements under previous guidance. See Note 6 for additional disclosures.
(4) As of March 31, 2021, we were in default on one non-recourse term loan with a balance of $3,809 for failure to meet the debt service coverage ratio of 1 to 1, however, a waiver was received in April 2022.

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Income Taxes (Tables)

3 Months Ended

Mar. 31, 2022

Income Tax Disclosure [Abstract]

Reconciliation of Gross Unrecognized Tax Benefits

The following table sets forth the total amounts of gross unrecognized tax benefits:

	Gross Unrecognized Tax Benefits
Balance, December 31, 2021	$	900
Balance, March 31, 2022	$	900

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Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Summary of Changes in Fair Value by Balance Sheet Grouping

The following table presents the input level used to determine the fair values of our financial instruments measured at fair value on a recurring basis:

		Fair Value as of
	Level	March 31, 2022		December 31, 2021
Assets:
Interest rate swap instruments	2	$	2,220	$	919
Total assets		$	2,220	$	919
Liabilities:
Interest rate swap instruments	2	$	2,726	$	6,316
Commodity swap instruments	2	4,568		1,962
Make-whole provisions	2	5,085		4,800
Contingent consideration	3	2,419		2,838
Total liabilities		$	14,798	$	15,916

Schedule of Changes in Fair Value of Contingent Liabilities Classified as Level 3

The following table sets forth a summary of changes in the fair value of contingent consideration liability classified as level 3:

	Year Ended December 31,
	March 31, 2022		December 31, 2021
Contingent consideration liability balance at the beginning of period	$	2,838	$	678
Contingent consideration issued in connection with acquisition	—		2,160
Changes in fair value included in earnings	(320)		—
Remeasurement adjustment	(99)		—
Contingent consideration liability balance at the end of period	$	2,419	$	2,838

Fair Value and Carrying Value of Long-Term Debt

The following table sets forth the fair value and the carrying value of our long-term debt, excluding financing leases:

	As of March 31, 2022				As of December 31, 2021
	Fair Value		Carrying Value		Fair Value		Carrying Value
Long-term debt (Level 2)	$	726,649	$	720,687	$	442,429	$	436,892

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Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Fair Value of Derivative Instruments

The following table presents information about the fair value amounts of our cash flow derivative instruments:  

		Derivatives as of
		March 31, 2022		December 31, 2021
	Balance Sheet Location	Fair Value		Fair Value
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other assets	$	39	$	—
Interest rate swap contracts	Other liabilities	$	2,726	$	6,316
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other assets	$	2,181	$	919
Commodity swap contracts	Other liabilities	$	4,568	$	1,962
Make-whole provisions	Other liabilities	$	5,085	$	4,800

Schedule of Derivative Effect on Consolidated Statement of Income (Loss)

The following table presents information about the effects of our derivative instruments on our condensed consolidated statements of income and condensed consolidated statements of comprehensive income:

		Amount of Loss (Gain) Recognized in Net Income
	Location of Loss (Gain) Recognized in Net Income	Three Months Ended March 31,
		2022		2021
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	481	$	523
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	(1,262)	$	(1,323)
Commodity swap contracts	Other expenses, net	$	2,606	$	248
Make-whole provisions	Other expenses, net	$	278	$	697

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)

The following table presents the changes in Accumulated Other Comprehensive Income (“AOCI”), net of taxes, from our hedging instruments:

	Three Months Ended March 31, 2022
Derivatives Designated as Hedging Instruments:
Accumulated loss in AOCI at the beginning of the period	$	(4,733)
Unrealized gain recognized in AOCI	2,230
Loss reclassified from AOCI to other expenses, net	481
Net gain on derivatives	2,711
Accumulated loss in AOCI at the end of the period	$	(2,022)

Schedule of Active Derivative Instruments

The following tables present all of our active derivative instruments as of March 31, 2022:

Active Interest Rate Swaps	Effective Date	Expiration Date	Initial Notional Amount ($)		Status
11-Year, 5.77% Fixed	October 2018	October 2029	$	9,200	Designated
15-Year, 5.24% Fixed	June 2018	June 2033	$	10,000	Designated
10-Year, 4.74% Fixed	June 2017	December 2027	$	14,100	Designated
15-Year, 3.26% Fixed	February 2023	December 2038	$	14,084	Designated
7-Year, 2.19% Fixed	February 2016	February 2023	$	20,746	Designated
8-Year, 3.70% Fixed	March 2020	June 2028	$	14,643	Designated
8-Year, 3.70% Fixed	March 2020	June 2028	$	10,734	Designated
13-Year, 0.93% Fixed	May 2020	March 2033	$	9,505	Not Designated
13-Year, 0.93% Fixed	May 2020	March 2033	$	6,968	Not Designated
15.5-Year, 5.40% Fixed	September 2008	March 2024	$	13,081	Designated
2.75-Year, 0.41% Fixed	December 2020	September 2023	$	26,250	Not Designated

Active Commodity Swaps	Effective Date	Expiration Date	Initial Notional Amount (Volume)	Commodity Measurement	Status
3.5-Year, $2.65 MMBtu Fixed	December 2020	June 2024	3,296,160	MMBtus	Not Designated

Other Derivatives	Classification	Effective Date	Expiration Date	Fair Value ($)
Make-whole provisions	Liability	June/August 2018	December 2038	$	583
Make-whole provisions	Liability	August 2016	April 2031	$	77
Make-whole provisions	Liability	April 2017	February 2034	$	72
Make-whole provisions	Liability	November 2020	December 2027	$	56
Make-whole provisions	Liability	October 2011	May 2028	$	12
Make-whole provisions	Liability	May 2021	April 2045	$	319
Make-whole provisions	Liability	July 2021	March 2046	$	3,966

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Variable Interest Entities And Equity Method Investments (Tables)

3 Months Ended

Mar. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Variable Interest Entities

The table below presents a summary of amounts related to our consolidated investment funds and joint venture, which we determined meet the definition of a variable interest entity (“VIE”), as of:

	March 31,		December 31,
	2022 (1)		2021 (1)
Cash and cash equivalents	$	5,434	$	4,915
Restricted cash	776		822
Accounts receivable, net	790		656
Costs and estimated earnings in excess of billings	1,884		1,421
Prepaid expenses and other current assets	159		151
Total VIE current assets	9,043		7,965
Property and equipment, net	1,266		1,266
Energy assets, net	119,310		108,498
Operating lease assets	6,225		6,271
Restricted cash, net of current portion	435		418
Other assets	36		36
Total VIE assets	$	136,315	$	124,454
Current portions of long-term debt and financing lease liabilities	$	2,196	$	2,210
Accounts payable	94		47
Accrued expenses and other current liabilities	548		643
Current portions of operating lease liabilities	147		142
Total VIE current liabilities	2,985		3,042
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	20,499		20,952
Long-term operating lease liabilities, net of current portion	6,630		6,558
Other liabilities	676		573
Total VIE liabilities	$	30,790	$	31,125
(1) The amounts in the above table are reflected in Note 1 on our condensed consolidated balance sheets.

Schedule of Equity Method Investments

The following table provides information about our equity method investments in joint ventures:

	As of
	March 31, 2022		December 31, 2021
Equity method investments	$	9,839	$	9,206
	Three Months Ended March 31,
	March 31, 2022		March 31, 2021
Earnings (loss) recognized	$	637	$	(62)

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following is a reconciliation of the numerator and denominator for the computation of basic and diluted earnings per share:

	Three Months Ended March 31,
(In thousands, except per share data)	2022		2021
Numerator:
Net income attributable to common shareholders	$	17,384	$	11,174
Adjustment for accretion of tax equity financing fees	(28)		(31)
Income attributable to common shareholders	$	17,356	$	11,143
Denominator:
Basic weighted-average shares outstanding	51,744		48,975
Effect of dilutive securities:
Stock options	1,892		1,382
Diluted weighted-average shares outstanding	53,636		50,357
Net income per share attributable to common shareholders:
Basic	$	0.34	$	0.23
Diluted	$	0.32	$	0.22
Potentially dilutive shares (1)	783		1,157
(1) Potentially dilutive shares attributable to stock options were excluded from the computation of diluted earnings per share as the effect would have been anti-dilutive.

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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Share-based Payment Arrangement [Abstract]

Schedule of Share-based Compensation Expense

We recorded stock-based compensation expense, including expense related to our employee stock purchase plan, as follows:

	Three Months Ended March 31,
	2022		2021
Stock-based compensation expense	$	3,531	$	766

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Business Segment Information (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule of Operational Results by Business Segments

The tables below present our business segment information recast for the prior-year period and a reconciliation to the condensed consolidated financial statements:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total Consolidated
Three Months Ended March 31, 2022
Revenues	$	314,520	$	75,646	$	17,172	$	29,261	$	37,403	$	474,002
Loss on derivatives	227		51		—		1,344		—		1,622
Interest expense, net of interest income	1,642		306		222		1,790		(7)		3,953
Depreciation and amortization of intangible assets	5,278		1,245		447		5,416		271		12,657
Unallocated corporate activity	—		—		—		—		—		(15,909)
Income before taxes, excluding unallocated corporate activity	18,218		8,886		279		7,422		2,709		37,514
Three Months Ended March 31, 2021
Revenues	$	89,244	$	102,214	$	11,643	$	25,580	$	23,521	$	252,202
Loss (gain) on derivatives	532		—		179		(1,074)		—		(363)
Interest expense, net of interest income	1,443		321		207		610		159		2,740
Depreciation and amortization of intangible assets	3,486		1,010		415		4,862		377		10,150
Unallocated corporate activity	—		—		—		—		—		(10,965)
Income before taxes, excluding unallocated corporate activity	3,239		12,030		(85)		8,772		1,645		25,601

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Other Expenses, Net (Tables)

3 Months Ended

Mar. 31, 2022

Other Income and Expenses [Abstract]

Schedule of Other Expenses, Net

The following table presents the components of other expenses, net:

	Three Months Ended March 31,
	2022		2021
Loss (gain) on derivatives	$	1,622	$	(377)
Interest expense, net of interest income	4,489		2,805
Amortization of debt discount and debt issuance costs	852		747
Foreign currency transaction loss	116		495
Government incentives	2		2
Other expenses, net	$	7,081	$	3,672

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Summary of Significant Accounting Policies - Allowance for Credit Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning of period	$ 2,263	$ 2,266
Provision for bad debts	237	3
Account write-offs and other	(235)	41
Allowance for credit losses, end of period	$ 2,265	$ 2,310

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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 474,002	$ 252,202
Percentage of revenue recognized over time	96.00%	94.00%
United States
Disaggregation of Revenue [Line Items]
Revenues	$ 438,391	$ 234,009
Canada
Disaggregation of Revenue [Line Items]
Revenues	15,988	10,853
Other
Disaggregation of Revenue [Line Items]
Revenues	19,623	7,340
Project revenue
Disaggregation of Revenue [Line Items]
Revenues	393,404	180,693
O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	20,253	18,484
Energy assets
Disaggregation of Revenue [Line Items]
Revenues	38,428	33,287
Integrated-PV
Disaggregation of Revenue [Line Items]
Revenues	11,356	9,154
Other
Disaggregation of Revenue [Line Items]
Revenues	10,561	10,584
U.S. Regions
Disaggregation of Revenue [Line Items]
Revenues	314,520	89,244
U.S. Regions | Project revenue
Disaggregation of Revenue [Line Items]
Revenues	298,632	75,812
U.S. Regions | O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	5,080	4,415
U.S. Regions | Energy assets
Disaggregation of Revenue [Line Items]
Revenues	10,018	8,802
U.S. Regions | Integrated-PV
Disaggregation of Revenue [Line Items]
Revenues	0	0
U.S. Regions | Other
Disaggregation of Revenue [Line Items]
Revenues	790	215
U.S. Federal
Disaggregation of Revenue [Line Items]
Revenues	75,646	102,214
U.S. Federal | Project revenue
Disaggregation of Revenue [Line Items]
Revenues	62,217	90,089
U.S. Federal | O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	12,297	11,440
U.S. Federal | Energy assets
Disaggregation of Revenue [Line Items]
Revenues	1,090	664
U.S. Federal | Integrated-PV
Disaggregation of Revenue [Line Items]
Revenues	0	0
U.S. Federal | Other
Disaggregation of Revenue [Line Items]
Revenues	42	21
Canada
Disaggregation of Revenue [Line Items]
Revenues	17,172	11,643
Canada | Project revenue
Disaggregation of Revenue [Line Items]
Revenues	13,951	9,001
Canada | O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	11	26
Canada | Energy assets
Disaggregation of Revenue [Line Items]
Revenues	761	747
Canada | Integrated-PV
Disaggregation of Revenue [Line Items]
Revenues	0	0
Canada | Other
Disaggregation of Revenue [Line Items]
Revenues	2,449	1,869
Non-Solar DG
Disaggregation of Revenue [Line Items]
Revenues	29,261	25,580
Non-Solar DG | Project revenue
Disaggregation of Revenue [Line Items]
Revenues	0	0
Non-Solar DG | O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	2,774	2,532
Non-Solar DG | Energy assets
Disaggregation of Revenue [Line Items]
Revenues	26,487	22,939
Non-Solar DG | Integrated-PV
Disaggregation of Revenue [Line Items]
Revenues	0	0
Non-Solar DG | Other
Disaggregation of Revenue [Line Items]
Revenues	0	109
All Other
Disaggregation of Revenue [Line Items]
Revenues	37,403	23,521
All Other | Project revenue
Disaggregation of Revenue [Line Items]
Revenues	18,604	5,791
All Other | O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	91	71
All Other | Energy assets
Disaggregation of Revenue [Line Items]
Revenues	72	135
All Other | Integrated-PV
Disaggregation of Revenue [Line Items]
Revenues	11,356	9,154
All Other | Other
Disaggregation of Revenue [Line Items]
Revenues	$ 7,280	$ 8,370

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Revenue from Contracts with Customers - Contract Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2022		Dec. 31, 2021		Mar. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 204,082	[1]	$ 161,970	[1]	$ 113,095	$ 125,010
Accounts receivable retainage, net	40,555		43,067		32,071	30,189
Contract Assets:
Costs and estimated earnings in excess of billings	460,240	[1]	306,172	[1]	179,474	185,960
Contract Liabilities:
Billings in excess of cost and estimated earnings	31,729		35,918		30,211	33,984
Billings in excess of cost and estimated earnings, non-current	6,322		6,481		6,590	6,631
Total contract liabilities	$ 38,051		$ 42,399		$ 36,801	$ 40,615

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at March 31, 2022 and December 31, 2021 of $136,315 and $124,454, respectively. Includes non-recourse liabilities of consolidated VIEs at March 31, 2022 and December 31, 2021 of $30,790 and $31,125, respectively. See Note 12.

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Revenue from Contracts with Customers - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with customer, asset, revenue recognized	$ 381,949,000	$ 130,297,000
Contract with customer, asset, reclassified to receivable	229,540,000	144,539,000
Contract with customer, liability, revenue recognized	33,077,000	45,483,000
Contract with customer, liability, billings	23,723,000	33,081,000
Revenue, remaining performance obligation	$ 2,553,770,000
Contract term	25 years
Capitalized contract cost, project development costs	$ 4,209,000	1,985,000
Capitalized contract cost, impairment loss	$ 0	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligation, percentage	48.00%
Revenue, remaining performance obligation, remaining satisfaction	12 months

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Goodwill and Intangible Assets, Net - Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Carrying Value of Goodwill
Balance, December 31, 2021	$ 71,157
Remeasurement adjustment	309
Currency effects	(132)
Balance, March 31, 2022	71,334
U.S. Regions
Carrying Value of Goodwill
Balance, December 31, 2021	39,204
Remeasurement adjustment	309
Currency effects	0
Balance, March 31, 2022	39,513
U.S. Federal
Carrying Value of Goodwill
Balance, December 31, 2021	3,981
Remeasurement adjustment	0
Currency effects	0
Balance, March 31, 2022	3,981
Canada
Carrying Value of Goodwill
Balance, December 31, 2021	3,454
Remeasurement adjustment	0
Currency effects	53
Balance, March 31, 2022	3,507
Non-solar DG
Carrying Value of Goodwill
Balance, December 31, 2021	0
Remeasurement adjustment	0
Currency effects	0
Balance, March 31, 2022	0
Other
Carrying Value of Goodwill
Balance, December 31, 2021	24,518
Remeasurement adjustment	0
Currency effects	(185)
Balance, March 31, 2022	$ 24,333

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Goodwill and Intangible Assets, Net - Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amount	$ 32,939	$ 33,526
Less - accumulated amortization	(26,965)	(26,565)
Intangible assets, net	$ 5,974	$ 6,961

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Goodwill and Intangible Assets, Net - Amortization (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 578	$ 80
Customer contracts
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	184	0
All other intangible assets
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 394	$ 80

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Energy Assets, Net - Energy Assets (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Energy assets, net	[1]	$ 908,006	$ 856,531
Energy Assets
Property, Plant and Equipment [Line Items]
Energy assets		1,184,314	1,120,712
Less - accumulated depreciation and amortization		(276,308)	(264,181)
Energy assets, net		$ 908,006	$ 856,531

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at March 31, 2022 and December 31, 2021 of $136,315 and $124,454, respectively. Includes non-recourse liabilities of consolidated VIEs at March 31, 2022 and December 31, 2021 of $30,790 and $31,125, respectively. See Note 12.

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Energy Assets, Net - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Business Acquisition [Line Items]
Cost of revenues	$ 11,806	$ 9,686
Capitalized interest	1,312	2,238
ARO assets, net	2,473		$ 1,939
ARO liabilities, current	9		6
ARO liabilities, non-current	2,947		2,342
Total ARO liabilities	2,956		$ 2,348
Depreciation expense of ARO assets	734	833
Accretion expense of ARO liabilities	36	24
ARO Asset
Business Acquisition [Line Items]
Depreciation expense of ARO assets	$ 37	$ 23

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Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Operating Leases:
Operating lease assets	[1]	$ 39,485	$ 41,982
Current portions of operating lease liabilities	[1]	6,134	6,276
Long-term portions of operating lease liabilities	[1]	32,854	35,135
Total operating lease liabilities		$ 38,988	$ 41,411
Weighted-average remaining lease term		12 years	12 years
Weighted-average discount rate		5.70%	5.70%
Financing Leases:
Energy assets		$ 31,521	$ 31,876
Current portions of financing lease liabilities		3,226	3,125
Long-term financing lease liabilities, net of current portion, unamortized discount and debt issuance costs		15,973	16,101
Total financing lease liabilities		$ 19,199	$ 19,226
Weighted-average remaining lease term		15 years	15 years
Weighted-average discount rate		12.10%	12.10%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]		Energy assets, net	Energy assets, net
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Current portions of long-term debt and financing lease liabilities	Current portions of long-term debt and financing lease liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]		Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at March 31, 2022 and December 31, 2021 of $136,315 and $124,454, respectively. Includes non-recourse liabilities of consolidated VIEs at March 31, 2022 and December 31, 2021 of $30,790 and $31,125, respectively. See Note 12.

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Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Leases:
Operating lease costs	$ 2,291	$ 2,153
Financing Leases:
Amortization expense	355	532
Interest on lease liabilities	559	658
Total lease costs	$ 3,205	$ 3,343

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Leases - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 1,907	$ 2,423
Right-of-use assets (“ROU”) obtained in exchange for new operating lease liabilities	$ 367	$ 3,773

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Leases - Minimum Future Lease Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Operating Leases
2022	$ 6,134
2023	7,176
2024	5,943
2025	4,725
2026	2,880
Thereafter	28,615
Total minimum lease payments	55,473
Less: interest	16,485
Present value of lease liabilities	38,988	$ 41,411
Financing Leases
2022	5,124
2023	3,676
2024	2,565
2025	2,213
2026	2,054
Thereafter	19,813
Total minimum lease payments	35,445
Less: interest	16,246
Present value of lease liabilities	$ 19,199	$ 19,226

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Leases - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) project	Mar. 31, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Net amortization expense	$ 57	$ 57
Solar Photovoltaic Projects | August 2018 Long Term Finance Liability
Lessee, Lease, Description [Line Items]
Solar PV projects sold | project	2
Investment fund call option exercise	$ 8,201
Solar Photovoltaic Projects | December 2020 Long Term Finance Liability
Lessee, Lease, Description [Line Items]
Solar PV projects sold | project	1
Investment fund call option exercise	$ 4,423
Solar Photovoltaic Projects | Revolving Credit Facility | Line of Credit | August 2018 Long Term Finance Liability
Lessee, Lease, Description [Line Items]
Available funding under lending commitment	220,367
Solar Photovoltaic Projects | Revolving Credit Facility | Line of Credit | December 2020 Long Term Finance Liability
Lessee, Lease, Description [Line Items]
Available funding under lending commitment	$ 11,515

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Debt and Financing Lease Liabilities - Summary of Long-term Debt (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Mar. 03, 2022	Dec. 31, 2021	Mar. 31, 2021
Debt Instrument [Line Items]
Financing lease liabilities		$ 19,199		$ 19,226
Total debt and financing lease liabilities		756,855		471,488
Less: current maturities		80,191		78,934
Less: unamortized discount and debt issuance costs		16,969	$ 96	15,370
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs	[1]	659,695		377,184
Term Loan | Senior secured term loans
Debt Instrument [Line Items]
Long-term debt, gross		275,000		52,813
Term Loan | Non-recourse term loans
Debt Instrument [Line Items]
Long-term debt, gross		205,329		218,136
Debt instrument, debt default, amount					$ 3,809
Term Loan | Long-term financing facilities
Debt Instrument [Line Items]
Long-term debt, gross		104,417		104,615
Line of Credit | Non-recourse construction revolvers
Debt Instrument [Line Items]
Long-term debt, gross		31,910		31,698
Revolving Senior Secured Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross		121,000		$ 45,000
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Funds available for borrowing		$ 47,341

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at March 31, 2022 and December 31, 2021 of $136,315 and $124,454, respectively. Includes non-recourse liabilities of consolidated VIEs at March 31, 2022 and December 31, 2021 of $30,790 and $31,125, respectively. See Note 12.

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Debt and Financing Lease Liabilities - Additional Information (Details)	Mar. 04, 2022 USD ($) bank	Apr. 29, 2022 USD ($)	Mar. 31, 2022 USD ($)	Mar. 03, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Unamortized discount and debt issuance costs			$ 16,969,000	$ 96,000	$ 15,370,000
Line of Credit | Senior Secured Credit Facility, Revolver And Term Loans
Debt Instrument [Line Items]
Original principal amount	$ 495,000,000			245,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, additional borrowing capacity	650,000,000
Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Line of credit facility, additional borrowing capacity	100,000,000
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Line of credit facility, additional borrowing capacity	$ 25,000,000
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, number of banks | bank	5
Maximum borrowing capacity				$ 180,000,000
Current borrowing capacity	$ 200,000,000
Total funded debt to EBITDA covenant ratio, maximum	4.50			3.50
Basis spread on variable rate	150.00%
Lender fees and debt issuance costs	$ 2,048,000
Debt issuance costs	$ 352,000
Funds available for borrowing			$ 47,341,000
Revolving Credit Facility | Line of Credit | Quarter ending June 30, 2022
Debt Instrument [Line Items]
Total funded debt to EBITDA covenant ratio, maximum	4.25
Revolving Credit Facility | Line of Credit | Quarter ending September 30, 2022
Debt Instrument [Line Items]
Total funded debt to EBITDA covenant ratio, maximum	4.00
Revolving Credit Facility | Line of Credit | Thereafter
Debt Instrument [Line Items]
Total funded debt to EBITDA covenant ratio, maximum	3.50
Revolving Credit Facility | Line of Credit | June 2022 Construction Revolver
Debt Instrument [Line Items]
Fixed interest rate, percentage			1.74%
Funds available for borrowing			$ 73,946,000
Revolving Credit Facility | Line of Credit | June 2022 Construction Revolver | Subsequent Event
Debt Instrument [Line Items]
Funds available for borrowing		$ 9,800,000
Revolving Credit Facility | Line of Credit | July 2022 Construction Revolver
Debt Instrument [Line Items]
Fixed interest rate, percentage			1.99%
Funds available for borrowing			$ 24,145,000
Term Loan | Line of Credit | Term Loan Due September 2023
Debt Instrument [Line Items]
Delayed draw	$ 220,000,000
Term Loan | Secured Debt
Debt Instrument [Line Items]
Original principal amount	$ 75,000,000			$ 65,000,000

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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income tax provision	$ 2,307	$ 2,205
Effective tax rate, percentage	10.70%	15.10%
Unrecognized tax benefits	$ 440		$ 440

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Income Taxes - Unrecognized Tax Benefits (Details) $ in Thousands	Mar. 31, 2022 USD ($)
Gross Unrecognized Tax Benefits
Balance, December 31, 2021	$ 900
Balance, March 31, 2022	$ 900

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Commitments and Contingencies (Details)		1 Months Ended	4 Months Ended	44 Months Ended
	Nov. 06, 2017 contractor	Aug. 31, 2018	Mar. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Number of defendants | contractor	9
Chelsea Group Limited
Loss Contingencies [Line Items]
Contingent consideration, liability, revenue earn-outs, payment period (in years)		5 years
Contingent consideration, liability, fair value at date of acquisition			$ 358,000	$ 358,000	$ 678,000
Payments				0
Plug Smart
Loss Contingencies [Line Items]
Contingent consideration, liability, revenue earn-outs, payment period (in years)			5 years
Contingent consideration, liability, fair value at date of acquisition			$ 2,061,000	$ 2,061,000
Payments			$ 0
Maximum cumulative earn-out					5,000,000
Contingent consideration					$ 2,160,000

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Fair Value Measurement - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets:
Total assets	$ 2,220	$ 919
Liabilities:
Total liabilities	14,798	15,916
Level 2 | Interest rate swap instruments
Assets:
Total assets	2,220	919
Liabilities:
Liability derivatives	2,726	6,316
Level 2 | Commodity swap instruments
Liabilities:
Liability derivatives	4,568	1,962
Level 2 | Make-whole provisions
Liabilities:
Liability derivatives	5,085	4,800
Level 3
Liabilities:
Contingent consideration	$ 2,419	$ 2,838

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Fair Value Measurement - Changes in Contingent Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration liability balance at the beginning of period	$ 2,838	$ 678
Contingent consideration issued in connection with acquisition	0	2,160
Changes in fair value included in earnings	(320)	0
Remeasurement adjustment	(99)	0
Contingent consideration liability balance at the end of period	$ 2,419	$ 2,838

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Fair Value Measurement - Fair Value and Carrying Value of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt (Level 2)	$ 726,649	$ 442,429
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt (Level 2)	$ 720,687	$ 436,892

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Fair Value Measurement - Narrative (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value disclosure, nonrecurring	$ 0	$ 0

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Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments on the Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Derivatives Designated as Hedging Instruments | Interest rate swap contracts | Other assets
Derivatives, Fair Value [Line Items]
Asset derivatives	$ 39	$ 0
Derivatives Designated as Hedging Instruments | Interest rate swap contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	2,726	6,316
Derivatives Not Designated as Hedging Instruments | Interest rate swap contracts | Other assets
Derivatives, Fair Value [Line Items]
Asset derivatives	2,181	919
Derivatives Not Designated as Hedging Instruments | Commodity swap contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	4,568	1,962
Derivatives Not Designated as Hedging Instruments | Make-whole provisions | Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	$ 5,085	$ 4,800

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Derivative Instruments and Hedging Activities - Additional Information (Details) - contract	Mar. 31, 2022	Dec. 31, 2021
Not Designated
Derivative [Line Items]
Number of instruments held	4	4

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Derivative Instruments and Hedging Activities - Effects on Statements of Income (Loss) and Consolidated Statements of Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Recognized in Net Income	$ 1,622	$ (363)
Derivatives Designated as Hedging Instruments | Other expenses, net | Interest rate swap contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Recognized in Net Income	481	523
Derivatives Not Designated as Hedging Instruments | Other expenses, net | Interest rate swap contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Recognized in Net Income	(1,262)	(1,323)
Derivatives Not Designated as Hedging Instruments | Other expenses, net | Commodity swap contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Recognized in Net Income	2,606	248
Derivatives Not Designated as Hedging Instruments | Other expenses, net | Make-whole provisions
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Recognized in Net Income	$ 278	$ 697

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Derivative Instruments and Hedging Activities - Effects of Derivative Instruments in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 704,264	$ 492,813
Total other comprehensive income	2,778	2,531
Ending balance	736,210	$ 628,855
Accumulated Gain (Loss), Net, Cash Flow Hedge
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(4,733)
Unrealized gain recognized in AOCI	2,230
Loss reclassified from AOCI to other expenses, net	481
Total other comprehensive income	2,711
Ending balance	$ (2,022)

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Derivative Instruments and Hedging Activities - Summary of Active Derivative Instruments (Details)	3 Months Ended
	Mar. 31, 2022 USD ($) MMBTU $ / MMBTU
Designated | Interest Rate Swap October 2029
Derivative [Line Items]
Term of contract, years	11 years
Fixed interest rate, percentage	5.77%
Initial Notional Amount ($)	$ 9,200,000
Designated | Interest Rate Swap June 2033
Derivative [Line Items]
Term of contract, years	15 years
Fixed interest rate, percentage	5.24%
Initial Notional Amount ($)	$ 10,000,000
Designated | Interest Rate Swap - December 2027
Derivative [Line Items]
Term of contract, years	10 years
Fixed interest rate, percentage	4.74%
Initial Notional Amount ($)	$ 14,100,000
Designated | Interest Rate Swap - December 2038
Derivative [Line Items]
Term of contract, years	15 years
Fixed interest rate, percentage	3.26%
Initial Notional Amount ($)	$ 14,084,000
Designated | Interest Rate Swap - February 2023
Derivative [Line Items]
Term of contract, years	7 years
Fixed interest rate, percentage	2.19%
Initial Notional Amount ($)	$ 20,746,000
Designated | Interest Rate Swap - June 2028
Derivative [Line Items]
Term of contract, years	8 years
Fixed interest rate, percentage	3.70%
Initial Notional Amount ($)	$ 14,643,000
Designated | Interest Rate Swap - June 2028
Derivative [Line Items]
Term of contract, years	8 years
Fixed interest rate, percentage	3.70%
Initial Notional Amount ($)	$ 10,734,000
Designated | Interest Rate Swap - March 2024
Derivative [Line Items]
Term of contract, years	15 years 6 months
Fixed interest rate, percentage	5.40%
Initial Notional Amount ($)	$ 13,081,000
Not Designated | Interest Rate Swap March 2033
Derivative [Line Items]
Term of contract, years	13 years
Fixed interest rate, percentage	0.93%
Initial Notional Amount ($)	$ 9,505,000
Not Designated | Interest Rate Swap March 2033
Derivative [Line Items]
Term of contract, years	13 years
Fixed interest rate, percentage	0.93%
Initial Notional Amount ($)	$ 6,968,000
Not Designated | Interest Rate Swap - September 2023
Derivative [Line Items]
Term of contract, years	2 years 9 months
Fixed interest rate, percentage	0.41%
Initial Notional Amount ($)	$ 26,250,000
Not Designated | Commodity Contract - June 2024
Derivative [Line Items]
Term of contract, years	3 years 6 months
Active commodity swap, price (in usd per unit) | $ / MMBTU	2.65
Nonmonetary notional amount (in MMBtus) | MMBTU	3,296,160
Not Designated | Make-whole Provisions December 2038 | Other liabilities
Derivative [Line Items]
Liability derivatives, fair value	$ 583,000
Not Designated | Make-whole Provisions April 2031 | Other liabilities
Derivative [Line Items]
Liability derivatives, fair value	77,000
Not Designated | Make-whole Provisions February 2034 | Other liabilities
Derivative [Line Items]
Liability derivatives, fair value	72,000
Not Designated | Make-whole Provision December 2027 | Other liabilities
Derivative [Line Items]
Liability derivatives, fair value	56,000
Not Designated | Make-whole Provision May 2028 | Other liabilities
Derivative [Line Items]
Liability derivatives, fair value	12,000
Not Designated | Make-whole Provision April 2045 | Other liabilities
Derivative [Line Items]
Liability derivatives, fair value	319,000
Not Designated | Make-whole Provision March 2046 | Other liabilities
Derivative [Line Items]
Liability derivatives, fair value	$ 3,966,000

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Variable Interest Entities And Equity Method Investments - Schedule of Variable Interest Entity Financial Information (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Variable interest entities, current assets	[1]	$ 845,201	$ 638,585
Total assets	[1]	2,530,570	2,224,821
Variable interest entities, current liabilities	[1]	395,142	474,224
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		9,043	7,965
Total assets		136,315	124,454
Variable interest entities, current liabilities		2,985	3,042
Total VIE liabilities		30,790	31,125
Cash and cash equivalents | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		5,434	4,915
Restricted cash | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		776	822
Accounts receivable, net | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		790	656
Costs and estimated earnings in excess of billings | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		1,884	1,421
Prepaid expenses and other current assets | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		159	151
Property and equipment, net | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent assets		1,266	1,266
Energy assets, net | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent assets		119,310	108,498
Operating lease assets | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent assets		6,225	6,271
Restricted cash, net of current portion | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent assets		435	418
Other assets | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent assets		36	36
Current portions of long-term debt and financing lease liabilities | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current liabilities		2,196	2,210
Accounts payable | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current liabilities		94	47
Accrued expenses and other current liabilities | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current liabilities		548	643
Current portions of operating lease liabilities | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current liabilities		147	142
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent liabilities		20,499	20,952
Long-term operating lease liabilities, net of current portion | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent liabilities		6,630	6,558
Other liabilities | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent liabilities		$ 676	$ 573

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at March 31, 2022 and December 31, 2021 of $136,315 and $124,454, respectively. Includes non-recourse liabilities of consolidated VIEs at March 31, 2022 and December 31, 2021 of $30,790 and $31,125, respectively. See Note 12.

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Variable Interest Entities And Equity Method Investments - Investment in Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Non-controlling interest	$ 6,335		$ 0
Equity method investments	9,839		$ 9,206
Earnings (loss) recognized	$ 637	$ (62)

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Variable Interest Entities And Equity Method Investments - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Variable Interest Entity [Line Items]
Distributions to redeemable non-controlling interests, net	$ 357	$ 495
Corporate Joint Venture
Variable Interest Entity [Line Items]
Distributions to redeemable non-controlling interests, net	$ 6,335

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Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net income attributable to common shareholders	$ 17,384	$ 11,174
Adjustment for accretion of tax equity financing fees	(28)	(31)
Income attributable to common shareholders	$ 17,356	$ 11,143
Denominator:
Basic weighted-average shares outstanding (in shares)	51,744	48,975
Effect of dilutive securities:
Stock options (in shares)	1,892	1,382
Diluted weighted-average shares outstanding (in shares)	53,636	50,357
Net income per share attributable to common shareholders:
Basic (in usd per share)	$ 0.34	$ 0.23
Diluted (in usd per share)	$ 0.32	$ 0.22
Potentially dilutive shares (in shares)	783	1,157

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Stock-Based Compensation - Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Stock-based compensation expense	$ 3,531	$ 766

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Stock-Based Compensation - Additional Information (Details) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested stock options unrecognized compensation expense | $	$ 46,295
2020 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in period (in shares) | shares	313
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average period	4 years
Stock Options | 2020 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, contractual period	10 years
Stock options, vesting period	5 years

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Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 474,002	$ 252,202
Loss (gain) on derivatives	1,622	(363)
Interest expense, net of interest income	3,953	2,740
Depreciation and amortization of intangible assets	12,657	10,150
Income before taxes, excluding unallocated corporate activity	37,514	25,601
U.S. Regions
Segment Reporting Information [Line Items]
Revenues	314,520	89,244
U.S. Federal
Segment Reporting Information [Line Items]
Revenues	75,646	102,214
Canada
Segment Reporting Information [Line Items]
Revenues	17,172	11,643
Non-Solar DG
Segment Reporting Information [Line Items]
Revenues	29,261	25,580
All Other
Segment Reporting Information [Line Items]
Revenues	37,403	23,521
Operating Segments | U.S. Regions
Segment Reporting Information [Line Items]
Revenues	314,520	89,244
Loss (gain) on derivatives	227	532
Interest expense, net of interest income	1,642	1,443
Depreciation and amortization of intangible assets	5,278	3,486
Income before taxes, excluding unallocated corporate activity	18,218	3,239
Operating Segments | U.S. Federal
Segment Reporting Information [Line Items]
Revenues	75,646	102,214
Loss (gain) on derivatives	51	0
Interest expense, net of interest income	306	321
Depreciation and amortization of intangible assets	1,245	1,010
Income before taxes, excluding unallocated corporate activity	8,886	12,030
Operating Segments | Canada
Segment Reporting Information [Line Items]
Revenues	17,172	11,643
Loss (gain) on derivatives	0	179
Interest expense, net of interest income	222	207
Depreciation and amortization of intangible assets	447	415
Income before taxes, excluding unallocated corporate activity	279	(85)
Operating Segments | Non-Solar DG
Segment Reporting Information [Line Items]
Revenues	29,261	25,580
Loss (gain) on derivatives	1,344	(1,074)
Interest expense, net of interest income	1,790	610
Depreciation and amortization of intangible assets	5,416	4,862
Income before taxes, excluding unallocated corporate activity	7,422	8,772
Operating Segments | All Other
Segment Reporting Information [Line Items]
Revenues	37,403	23,521
Loss (gain) on derivatives	0	0
Interest expense, net of interest income	(7)	159
Depreciation and amortization of intangible assets	271	377
Income before taxes, excluding unallocated corporate activity	2,709	1,645
Unallocated corporate activity
Segment Reporting Information [Line Items]
Unallocated corporate activity	$ (15,909)	$ (10,965)

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Other Expenses, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Other Income and Expenses [Abstract]
Loss (gain) on derivatives	$ 1,622	$ (377)
Interest expense, net of interest income	4,489	2,805
Amortization of debt discount and debt issuance costs	852	747
Foreign currency transaction loss	116	495
Government incentives	2	2
Other expenses, net	$ 7,081	$ 3,672

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Subsequent Event (Details) $ in Thousands	1 Months Ended
	Apr. 30, 2022 USD ($)
Subsequent Event
Subsequent Event [Line Items]
Payment of purchase commitment deposit	$ 10,000