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 September 30, 2020

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 and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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 o	Accelerated Filer ☑	Non-accelerated filer  o	Smaller reporting company ☐
Emerging growth company  ☐		(Do not check if a smaller reporting 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 November 2, 2020
Class A Common Stock, $0.0001 par value per share	AMRC	29,866,075
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 September 30, 2020 (Unaudited) and December 31, 2019	1
Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2020 and 2019 (Unaudited)	3
Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2020 and 2019 (Unaudited)	4
Condensed Consolidated Statements of Changes in Redeemable Non-Controlling Interests and Stockholders’ Equity for the three and nine months ended September 30, 2020 and 2019 (Unaudited)	5
Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2020 and 2019 (Unaudited)	7
Notes to Condensed Consolidated Financial Statements (Unaudited)	9
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	35
Item 3. Quantitative and Qualitative Disclosures About Market Risk	46
Item 4. Controls and Procedures	46
PART II - OTHER INFORMATION
Item 1. Legal Proceedings	47
Item 1A. Risk Factors	47
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	47
Item 5. Other Information	47
Item 6. Exhibits	49
Signatures	50

Part I - Financial Information

Item 1. Condensed Consolidated Financial Statements

AMERESCO, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts)

	September 30, 2020		December 31, 2019
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents (1)	$	45,351	$	33,223
Restricted cash (1)	15,598		20,006
Accounts receivable, net of allowance of $980 and $2,260, respectively (1)	121,672		95,863
Accounts receivable retainage, net	24,359		16,976
Costs and estimated earnings in excess of billings (1)	179,909		202,243
Inventory, net	9,081		9,236
Prepaid expenses and other current assets (1)	34,775		29,424
Income tax receivable	10,263		5,033
Project development costs	15,571		13,188
Total current assets (1)	456,579		425,192
Federal ESPC receivable	330,607		230,616
Property and equipment, net (1)	9,545		10,104
Energy assets, net (1)	670,139		579,461
Goodwill, net	58,172		58,414
Intangible assets, net	1,072		1,614
Operating lease assets (1)	36,336		32,791
Other assets (1)	22,247		35,821
Total assets (1)	$	1,584,697	$	1,374,013
LIABILITIES, REDEEMABLE NON-CONTROLLING INTERESTS AND STOCKHOLDERS’ EQUITY
Current liabilities:
Current portions of long-term debt and financing lease liabilities (1)	$	61,521	$	69,969
Accounts payable (1)	205,536		202,416
Accrued expenses and other current liabilities (1)	30,059		31,356
Current portions of operating lease liabilities (1)	6,010		5,802
Billings in excess of cost and estimated earnings	35,320		26,618
Income taxes payable	221		486
Total current liabilities (1)	338,667		336,647
Long-term debt and financing lease liabilities, net of current portion and deferred financing fees (1)	278,127		266,181
Federal ESPC liabilities	385,386		245,037
Deferred income taxes, net	3,994		115
Deferred grant income	7,007		6,885
Long-term operating lease liabilities, net of current portion (1)	32,509		29,101
Other liabilities (1)	39,529		29,575
Commitments and contingencies (Note 9)
Redeemable non-controlling interests, net	36,421		31,616

(1) Includes restricted assets of consolidated variable interest entities (“VIEs”) at September 30, 2020 and December 31, 2019 of $166,678 and $158,912, respectively. Includes non-recourse liabilities of consolidated VIEs at September 30, 2020 and December 31, 2019 of $35,334 and $38,568, respectively. See Note 12.

1

AMERESCO, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

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

	September 30, 2020		December 31, 2019
	(Unaudited)
Stockholders’ equity:
Preferred stock, $0.0001 par value, 5,000,000 shares authorized, no shares issued and outstanding at September 30, 2020 and December 31, 2019	$	—	$	—
Class A common stock, $0.0001 par value, 500,000,000 shares authorized, 31,967,870 shares issued and 29,866,075 shares outstanding at September 30, 2020, 31,331,345 shares issued and 29,230,005 shares outstanding at December 31, 2019	3		3
Class B common stock, $0.0001 par value, 144,000,000 shares authorized, 18,000,000 shares issued and outstanding at September 30, 2020 and December 31, 2019	2		2
Additional paid-in capital	141,599		133,688
Retained earnings	344,936		314,459
Accumulated other comprehensive loss, net	(11,695)		(7,514)
Treasury stock, at cost, 2,101,795 shares at September 30, 2020 and 2,101,340 shares at December 31, 2019	(11,788)		(11,782)
Total stockholders’ equity	463,057		428,856
Total liabilities, redeemable non-controlling interests and stockholders’ equity	$	1,584,697	$	1,374,013

See notes to condensed consolidated financial statements.

2

AMERESCO, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except share amounts) (Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Revenues	$	282,507	$	212,026	$	717,956	$	560,321
Cost of revenues	231,133		167,333		588,628		439,857
Gross profit	51,374		44,693		129,328		120,464
Selling, general and administrative expenses	26,859		31,231		82,403		87,396
Operating income	24,515		13,462		46,925		33,068
Other expenses, net	3,726		4,192		13,167		11,359
Income before income taxes	20,789		9,270		33,758		21,709
Income tax provision	3,100		939		597		2,000
Net income	17,689		8,331		33,161		19,709
Net loss (income) attributable to redeemable non-controlling interests	2,313		539		(2,593)		2,524
Net income attributable to common shareholders	$	20,002	$	8,870	$	30,568	$	22,233
Net income per share attributable to common shareholders:
Basic	$	0.42	$	0.19	$	0.64	$	0.48
Diluted	$	0.41	$	0.19	$	0.62	$	0.47
Weighted average common shares outstanding:
Basic	47,788		46,555		47,597		46,413
Diluted	49,101		47,693		48,785		47,675

See notes to condensed consolidated financial statements.

3

AMERESCO, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands) (Unaudited)

	Three Months Ended September 30,
	2020		2019
Net income	$	17,689	$	8,331
Other comprehensive income (loss):
Unrealized gain (loss) from interest rate hedges, net of tax effect of $199 and $(410)	638		(1,135)
Foreign currency translation adjustments	861		(356)
Total other comprehensive income (loss)	1,499		(1,491)
Comprehensive income	19,188		6,840
Comprehensive loss attributable to redeemable non-controlling interests	2,313		539
Comprehensive income attributable to common shareholders	$	21,501	$	7,379
	Nine Months Ended September 30,
	2020		2019
Net income	$	33,161	$	19,709
Other comprehensive (loss) income:
Unrealized loss from interest rate hedges, net of tax effect of $(1,209) and $(1,308)	(3,412)		(3,949)
Foreign currency translation adjustments	(769)		289
Total other comprehensive loss	(4,181)		(3,660)
Comprehensive income	28,980		16,049
Comprehensive (income) loss attributable to redeemable non-controlling interests	(2,593)		2,524
Comprehensive income attributable to common shareholders	$	26,387	$	18,573

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 September 30, 2020 and 2019

(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		Total Stockholders’ Equity
Balance, June 30, 2019	$	32,037	28,412,894	$	3	18,000,000	$	2	$	126,693	$	283,386	$	(8,118)	2,091,040	$	(11,638)	$	390,328
Exercise of stock options	—		630,220	—		—	—		4,005		—		—		—	—		4,005
Stock-based compensation expense	—		—	—		—	—		413		—		—		—	—		413
Open market purchase of common shares	—		(10,000)	—		—	—		—		—		—		10,000	(139)		(139)
Unrealized loss from interest rate hedges, net	—		—	—		—	—		—		—		(1,135)		—	—		(1,135)
Foreign currency translation adjustment	—		—	—		—	—		—		—		(356)		—	—		(356)
Contributions from redeemable non-controlling interests	974		—	—		—	—		—		—		—		—	—		—
Distributions to redeemable non-controlling interests	(364)		—	—		—	—		—		—		—		—	—		—
Net (loss) income	(539)		—	—		—	—		—		8,870		—		—	—		8,870
Balance, September 30, 2019	$	32,108	29,033,114	$	3	18,000,000	$	2	$	131,111	$	292,256	$	(9,609)	2,101,040	$	(11,777)	$	401,986
Balance, June 30, 2020	$	36,303	29,718,102	$	3	18,000,000	$	2	$	139,625	$	325,025	$	(13,194)	2,101,795	$	(11,788)	$	439,673
Exercise of stock options	—		147,813	—		—	—		1,450		—		—		—	—		1,450
Stock-based compensation expense	—		—	—		—	—		522		—		—		—	—		522
Employee stock purchase plan	—		160	—		—	—		2		—		—		—	—		2
Unrealized gain from interest rate hedges, net	—		—	—		—	—		—		—		638		—	—		638
Foreign currency translation adjustment	—		—	—		—	—		—		—		861		—	—		861
Contributions from redeemable non-controlling interests, net of tax equity financing fees of $635	2,865		—	—		—	—		—		—		—		—	—		—
Distributions to redeemable non-controlling interests	(525)		—	—		—	—		—		—		—		—	—		—
Accretion of tax equity financing fees	91		—	—		—	—		—		(91)		—		—	—		(91)
Net (loss) income	(2,313)		—	—		—	—		—		20,002		—		—	—		20,002
Balance, September 30, 2020	$	36,421	29,866,075	$	3	18,000,000	$	2	$	141,599	$	344,936	$	(11,695)	2,101,795	$	(11,788)	$	463,057

See notes to condensed consolidated financial statements.

5

AMERESCO, INC.

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

For the Nine Months Ended September 30, 2020 and 2019

(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		Total Stockholders’ Equity
Balance, December 31, 2018	$	14,719	28,275,506	$	3	18,000,000	$	2	$	124,651	$	269,806	$	(5,949)	2,091,040	$	(11,638)	$	376,875
Cumulative impact from the adoption of ASU No. 2014-09	—		—	—		—	—		—		217		(217)		—	—		—
Exercise of stock options	—		745,484	—		—	—		4,960		—		—		—	—		4,960
Stock-based compensation expense	—		—	—		—	—		1,195		—		—		—	—		1,195
Employee stock purchase plan	—		22,124	—		—	—		305		—		—		—	—		305
Open market purchase of common shares	—		(10,000)	—		—	—		—		—		—		10,000	(139)		(139)
Unrealized loss from interest rate hedges, net	—		—	—		—	—		—		—		(3,732)		—	—		(3,732)
Foreign currency translation adjustment	—		—	—		—	—		—		—		289		—	—		289
Contributions from redeemable non-controlling interests	20,482		—	—		—	—		—		—		—		—	—		—
Distributions to redeemable non-controlling interests	(569)		—	—		—	—		—		—		—		—	—		—
Net (loss) income	(2,524)		—	—		—	—		—		22,233		—		—	—		22,233
Balance, September 30, 2019	$	32,108	29,033,114	$	3	18,000,000	$	2	$	131,111	$	292,256	$	(9,609)	2,101,040	$	(11,777)	$	401,986
Balance, December 31, 2019	$	31,616	29,230,005	$	3	18,000,000	$	2	$	133,688	$	314,459	$	(7,514)	2,101,340	$	(11,782)	$	428,856
Exercise of stock options	—		608,063	—		—	—		6,088		—		—		—	—		6,088
Stock-based compensation expense	—		—	—		—	—		1,380		—		—		—	—		1,380
Employee stock purchase plan	—		28,462	—		—	—		443		—		—		—	—		443
Open market purchase of common shares	—		(455)	—		—	—		—		—		—		455	(6)		(6)
Unrealized loss from interest rate hedges, net	—		—	—		—	—		—		—		(3,412)		—	—		(3,412)
Foreign currency translation adjustment	—		—	—		—	—		—		—		(769)		—	—		(769)
Contributions from redeemable non-controlling interests, net of tax equity financing fees of $635	3,353		—	—		—	—		—		—		—		—	—		—
Distributions to redeemable non-controlling interests	(1,232)		—	—		—	—		—		—		—		—	—		—
Accretion of tax equity financing fees	91		—	—		—	—		—		(91)		—		—	—		(91)
Net income	2,593		—	—		—	—		—		30,568		—		—	—		30,568
Balance, September 30, 2020	$	36,421	29,866,075	$	3	18,000,000	$	2	$	141,599	$	344,936	$	(11,695)	2,101,795	$	(11,788)	$	463,057

See notes to condensed consolidated financial statements.

6

AMERESCO, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands) (Unaudited)

	Nine Months Ended September 30,
	2020		2019
Cash flows from operating activities:
Net income	$	33,161	$	19,709
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation of energy assets	28,496		26,338
Depreciation of property and equipment	2,492		2,115
Amortization of debt discount and deferred financing fees	1,849		1,734
Amortization of intangible assets	528		681
Accretion of ARO and contingent consideration	64		98
Recoveries of bad debts	(1,089)		(134)
Loss on disposal / impairment of long-lived assets	2,146		—
Gain on deconsolidation of VIE	—		(2,160)
Net loss (gain) from derivatives	971		(1,072)
Stock-based compensation expense	1,380		1,195
Deferred income taxes	5,146		152
Unrealized foreign exchange (gain) loss	(43)		149
Changes in operating assets and liabilities:
Accounts receivable	(21,178)		(4,468)
Accounts receivable retainage	(7,422)		(3,079)
Federal ESPC receivable	(160,231)		(110,374)
Inventory, net	155		(2,137)
Costs and estimated earnings in excess of billings	24,824		(23,130)
Prepaid expenses and other current assets	3,916		(11,084)
Project development costs	(2,557)		(5,641)
Other assets	1,050		(698)
Accounts payable, accrued expenses and other current liabilities	(2,942)		(8,931)
Billings in excess of cost and estimated earnings	9,019		(952)
Other liabilities	1,972		(1,602)
Income taxes payable, net	(5,496)		2,566
Cash flows from operating activities	(83,789)		(120,725)
Cash flows from investing activities:
Purchases of property and equipment	(1,968)		(6,188)
Purchases of energy assets, net of grant proceeds	(125,504)		(72,140)
Acquisitions, net of cash received	—		(1,279)
Contributions to equity investment	(130)		(323)
Cash flows from investing activities	(127,602)		(79,930)
See notes to condensed consolidated financial statements.

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AMERESCO, INC.
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands) (Unaudited) (Continued)
	Nine Months Ended September 30,
	2020		2019
Cash flows from financing activities:
Payments of financing fees	$	(3,955)	$	(541)
Proceeds from exercises of options and ESPP	6,531		5,265
Repurchase of common stock	(6)		(139)
Proceeds from senior secured credit facility, net	6,000		41,343
Proceeds from long-term debt financings	40,604		7,614
Proceeds from Federal ESPC projects	194,586		115,556
Proceeds for energy assets from Federal ESPC	1,435		1,639
Proceeds from investments by redeemable non-controlling interests, net	2,854		20,173
Payments on long-term debt	(42,550)		(18,033)
Cash flows from financing activities	205,499		172,877
Effect of exchange rate changes on cash	(465)		249
Net decrease in cash, cash equivalents, and restricted cash	(6,357)		(27,529)
Cash, cash equivalents, and restricted cash, beginning of period	77,264		97,913
Cash, cash equivalents, and restricted cash, end of period	$	70,907	$	70,384
Supplemental disclosures of cash flow information:
Cash paid for interest	$	14,764	$	12,410
Cash paid for income taxes	$	1,057	$	2,983
Non-cash Federal ESPC settlement	$	56,454	$	214,444
Accrued purchases of energy assets	$	38,747	$	17,224
Conversion of revolver to term loan	$	—	$	25,000

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheets to the total of the same such amounts shown above:

	Nine Months Ended September 30,
	2020		2019
Cash and cash equivalents	$	45,351	$	34,104
Short-term restricted cash	15,598		13,498
Long-term restricted cash included in other assets	9,958		22,782
Total cash and cash equivalents, and restricted cash	$	70,907	$	70,384

See notes to condensed consolidated financial statements.

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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”) are unaudited, pursuant to certain rules and regulations of the Securities and Exchange Commission, and include, in the opinion of the Company, 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 and nine months ended September 30, 2020 are not necessarily indicative of results which may be expected for the full year. The December 31, 2019 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 notes thereto, should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2019, and notes thereto, included in the Company’s annual report on Form 10-K for the year ended December 31, 2019 filed with the Securities and Exchange Commission on March 4, 2020.

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

Significant Risks and Uncertainties

In March 2020, the World Health Organization categorized Coronavirus Disease 2019 (“COVID-19”) as a pandemic, and the President of the United States declared the COVID-19 outbreak a national emergency.

The Company’s condensed consolidated financial statements reflect estimates and assumptions made by management that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and reported amounts of revenue and expenses during the reporting periods presented. The Company considered the impact of COVID-19 on the assumptions and estimates used and determined that there was no material adverse impact on the Company’s results of operations for the three or nine months ended September 30, 2020.

The severity of the impact of the COVID-19 pandemic on the Company's business will depend on a number of factors, including, but not limited to, the duration and severity of the pandemic and the extent and severity of the impact on the Company's customers, all of which are uncertain and cannot be predicted. The Company's future results of operations and liquidity could be adversely impacted by delays in payments of outstanding receivable amounts beyond normal payment terms, delays in obtaining signed customer contracts for awarded projects, supply chain disruptions and uncertain demand. As of the date of issuance of these condensed consolidated financial statements, the extent to which the COVID-19 pandemic may impact the Company's financial condition, liquidity, or results of operations is uncertain.

On March 27, 2020, the U.S. government enacted the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) which includes modifications to the limitation on business interest expense and net operating loss provisions, and provides a payment delay of employer payroll taxes during 2020 after the date of enactment. The Company estimates the payment of approximately $5,000 of employer payroll taxes otherwise due in 2020 will be delayed with 50% due by December 31, 2021 and the remaining 50% by December 31, 2022. The CARES Act permits net operating losses from the 2018, 2019, and 2020 tax years to be carried back to the previous five tax years (beginning with the earliest year first). The Company estimates the discrete benefit associated with the net operating loss provisions of the CARES Act to be approximately $2,000, an estimated refund of taxes paid in prior years of approximately $1,700, and the carryback also provides an additional refund of approximately $3,600 related to Alternative Minimum Tax credits.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The accounting policies of the Company are set forth in Note 2 to the consolidated financial statements contained in the Company’s 2019 annual report on Form 10-K. The Company includes herein certain updates to those policies.

Accounts Receivable and allowance for Credit Losses

Accounts receivable are stated at the amount management expects to collect from outstanding balances. Effective January 1, 2020, the Company adopted ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13) prospectively. This ASU replaces the incurred loss impairment model with an expected credit loss impairment model for financial instruments, including trade receivables. The amendment requires entities to consider

9

AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

forward-looking information to estimate expected credit losses, resulting in earlier recognition of losses for receivables that are current or not yet due, which were not considered under the previous accounting guidance. The Company performed an assessment of its allowance for credit losses and determined that no adjustment was required to retained earnings upon adoption.

The Company’s methodology to estimate the allowance for credit losses includes quarterly assessments of historical bad debt write-off experience, current economic and market conditions, management’s evaluation of outstanding accounts receivable, anticipated recoveries and the Company’s forecasts. Due to the short-term nature of its receivables, the estimate of credit losses is primarily based on aged accounts receivable balances and the financial condition of customers. In addition, specific allowance amounts are established to record the appropriate provision for customers that have a higher probability of default. Bad debts are written off against the allowance when identified. As part of its assessment, the Company also considered the current and expected future economic and market conditions due to the COVID-19 pandemic and determined that the estimate of credit losses was not significantly impacted as of September 30, 2020.

Changes in the allowance for credit losses are as follows:

	September 30, 2020		September 30, 2019
Allowance for credit loss, beginning of period	$	2,260	$	2,765
Recoveries of costs and expenses, net	(1,089)		(134)
Account write-offs and other	(191)		(45)
Allowance for credit loss, end of period	$	980	$	2,586

Recent Accounting Pronouncements

Fair Value Measurement

In August 2018, the FASB issued ASU 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement, which modifies the disclosure requirements on fair value measurements. ASU 2018-13 was effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company adopted this guidance as of January 1, 2020 and the adoption did not have a material impact on the Company’s condensed consolidated financial statements.

Consolidations

In October 2018, the FASB issued ASU 2018-17, Consolidation (Topic 810), Targeted Improvements to Related Party Guidance for Variable Interest Entities, which aligns the evaluation of whether a decision maker's fee is a variable interest with the guidance in the primary beneficiary test by requiring the decision maker to consider an indirect interest in a VIE held by related party under common control on a proportionate basis. The new standard was effective for interim and annual periods beginning after December 15, 2019, with early adoption permitted. The Company adopted this guidance as of January 1, 2020 and the adoption did not have an impact on the Company’s condensed consolidated financial statements.

Credit Losses

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13), and a subsequent amendment to the initial guidance, ASU 2018-19 Codification Improvements to Topic 326, Financial Instruments—Credit Losses (collectively, Topic 326). Topic 326 requires measurement and recognition of expected credit losses for financial assets held, which include, but are not limited to, trade and other receivables. The new standard was effective for fiscal years beginning after December 15, 2019. The Company adopted this guidance as of January 1, 2020 and the adoption did not have a material impact on the Company’s condensed consolidated financial statements.

In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives, and Hedging, and Topic 825, Financial Instruments. The improvements to Topic 815, among other things, clarifies some areas around partial-term fair value hedges, interest rate risk, the amortization of fair value hedge basis adjustments and their disclosure, and some clarification of matters related to the transitioning to ASU 2017-12, which was adopted by the Company during the year ended December 31, 2018. The improvements to Topic 326 clarify certain aspects surrounding accounting for credit losses in connection with the Company’s receivables. These include that the Company should consider anticipated recoveries in its calculation of credit losses. For those that have already adopted ASU No. 2017-12, the new standard

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was effective the first annual period beginning after the issuance date of ASU No. 2019-04, or as of January 1, 2020 for the Company, with early adoption permitted. The Company adopted this guidance as of January 1, 2020 and the adoption did not have a material impact on the Company’s condensed consolidated financial statements.

Income Taxes

In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes, which eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. ASU 2019-12 is effective for the Company for the fiscal year beginning after December 15, 2020. The Company is currently evaluating the impacts of the provisions of ASU 2019-12 on its condensed consolidated financial statements and disclosures.

Others

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 2020-0, 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. The Company is currently evaluating the impact that adopting this new accounting standard will have on its condensed consolidated financial statements and related disclosures.

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3. REVENUE FROM CONTRACTS WITH CUSTOMERS

Disaggregation of Revenue

The following tables provide information about disaggregated revenue by line of business, reportable segments, and geographical region for the three and nine months ended September 30, 2020 and 2019.

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Line of Business
Three Months Ended September 30, 2020
Project revenue	$	79,201	$	105,444	$	9,311	$	7,506	$	13,941	$	215,403
O&M revenue	4,492		11,384		—		2,009		36		17,921
Energy assets	9,060		1,325		1,227		18,535		161		30,308
Other	191		150		1,725		201		16,608		18,875
Total revenues	$	92,944	$	118,303	$	12,263	$	28,251	$	30,746	$	282,507
Three Months Ended September 30, 2019
Project revenue	$	72,667	$	58,199	$	9,380	$	3,059	$	2,592	$	145,897
O&M revenue	4,280		11,123		—		2,330		88		17,821
Energy assets	6,699		1,339		1,327		16,421		—		25,786
Other	433		597		1,958		65		19,469		22,522
Total revenues	$	84,079	$	71,258	$	12,665	$	21,875	$	22,149	$	212,026
Nine Months Ended September 30, 2020
Project revenue	$	226,734	$	233,778	$	24,342	$	12,881	$	22,027	$	519,762
O&M revenue	13,127		33,765		26		6,144		229		53,291
Energy assets	25,556		3,549		3,234		54,341		599		87,279
Other	956		447		5,088		738		50,395		57,624
Total revenues	$	266,373	$	271,539	$	32,690	$	74,104	$	73,250	$	717,956
Nine Months Ended September 30, 2019
Project revenue	$	196,284	$	134,954	$	20,112	$	6,318	$	8,818	$	366,486
O&M revenue	11,580		30,370		5		6,771		109		48,835
Energy assets	18,063		2,958		2,585		52,612		582		76,800
Other	1,969		1,055		4,994		669		59,513		68,200
Total revenues	$	227,896	$	169,337	$	27,696	$	66,370	$	69,022	$	560,321

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(In thousands) (Unaudited) (Continued)

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Geographical Regions
Three Months Ended September 30, 2020
United States	$	92,944	$	118,303	$	655	$	28,251	$	16,173	$	256,326
Canada	—		—		11,608		—		22		11,630
Other	—		—		—		—		14,551		14,551
Total revenues	$	92,944	$	118,303	$	12,263	$	28,251	$	30,746	$	282,507
Three Months Ended September 30, 2019
United States	$	84,079	$	71,258	$	1,023	$	21,875	$	17,936	$	196,171
Canada	—		—		11,642		—		50		11,692
Other	—		—		—		—		4,163		4,163
Total revenues	$	84,079	$	71,258	$	12,665	$	21,875	$	22,149	$	212,026
Nine Months Ended September 30, 2020
United States	$	266,373	$	271,539	$	2,173	$	74,104	$	49,294	$	663,483
Canada	—		—		30,517		—		124		30,641
Other	—		—		—		—		23,832		23,832
Total revenues	$	266,373	$	271,539	$	32,690	$	74,104	$	73,250	$	717,956
Nine Months Ended September 30, 2019
United States	$	227,896	$	169,337	$	2,281	$	66,370	$	56,052	$	521,936
Canada	—		—		25,415		—		157		25,572
Other	—		—		—		—		12,813		12,813
Total revenues	$	227,896	$	169,337	$	27,696	$	66,370	$	69,022	$	560,321

For the three months ended September 30, 2020 and 2019, approximately 95% and 93%, respectively, of revenue is recognized over time, and the remainder is for products and services transferred at a point in time. For the nine months ended September 30, 2020 and 2019, approximately 94% and 91%, respectively, of revenue is recognized over time, and the remainder is for products and services transferred at a point in time.

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers:

	September 30, 2020		December 31, 2019
Accounts receivable, net	$	121,672	$	95,863
Accounts receivable retainage, net	$	24,359	$	16,976
Contract Assets:
Costs and estimated earnings in excess of billings	$	179,909	$	202,243
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	40,302	$	32,178

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(In thousands) (Unaudited) (Continued)

	September 30, 2019		December 31, 2018
Accounts receivable, net	$	91,755	$	85,985
Accounts receivable retainage, net	$	16,652	$	13,516
Contract Assets:
Costs and estimated earnings in excess of billings	$	124,652	$	86,842
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	28,768	$	30,706

Accounts receivable retainage represents amounts due from customers, but where payments are withheld contractually until certain construction milestones are met. Amounts retained typically range from 5% to 10% of the total invoice. The Company classifies as a current asset those retainages that are expected to be billed in the next twelve months. Unbilled revenue, presented as costs and estimated earnings in excess of billings, represent amounts earned and billable that were not invoiced at the end of the fiscal period.

Contract assets represent the Company’s rights to consideration in exchange for services transferred to a customer that have not been billed as of the reporting date. The Company’s rights to consideration are generally unconditional at the time its performance obligations are satisfied.

At the inception of a contract, the Company expects the period between when it satisfies its performance obligations, and when the customer pays for the services, will be one year or less. As such, the Company has elected to apply the practical expedient which allows the Company to not adjust the promised amount of consideration for the effects of a significant financing component, when a financing component is present.

When the Company receives consideration, or such consideration is unconditionally due from a customer prior to transferring goods or services to the customer under the terms of a sales contract, the Company records deferred revenue, which represents a contract liability. Such deferred revenue typically results from billings in excess of costs incurred and advanced payments received on project contracts. As of September 30, 2020 and December 31, 2019, the Company classified $4,982 and $5,560, respectively, as a non-current liability, included in other liabilities on the condensed consolidated balance sheets, for those performance obligations expected to be completed beyond the next twelve months.

The decrease in contract assets for the nine months ended September 30, 2020 was primarily due to billings of $464,712, offset in part by revenue recognized of approximately $434,709. The increase in contract liabilities was primarily driven by the receipt of advance payment from customers, and related billings, exceeding reductions from recognition of revenue as performance obligations were satisfied. For the nine months ended September 30, 2020, the Company recognized revenue of $85,356 that was previously included in the beginning balance of contract liabilities and billed customers $86,203. Changes in contract liabilities are also driven by reclassifications to or from contract assets as a result of timing of customer payments.

The increase in contract assets for the nine months ended September 30, 2019 was primarily due to revenue recognized of $317,088, offset in part by billings of approximately $282,568. 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 nine months ended September 30, 2019, the Company recognized revenue of $92,685 that was previously included in the beginning balance of contract liabilities, and billed customers $92,427. Changes in contract liabilities are also driven by reclassifications to or from contract assets as a result of timing of customer payments.

Contracts are often modified for a change in scope or other requirements. The Company considers contract modifications to exist when the modification either creates new or changes the existing enforceable rights and obligations. Most of the Company’s contract modifications are for goods or services that are not distinct from the existing performance obligations.  The effect of a contract modification on the transaction price, and the measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue (either as an increase or decrease) on a cumulative catchup basis.

Performance Obligations

A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. Performance obligations are satisfied at a point in time or over time and are supported by contracts with customers. For most of the Company’s contracts, there are multiple promises of goods or services. Typically, the Company provides a significant service of integrating a complex set of tasks and components such as design, engineering, construction management, and equipment procurement for a project

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contract. The bundle of goods and services are provided to deliver one output for which the customer has contracted. In these cases, the Company considers the bundle of goods and services to be a single performance obligation. The Company may also promise to provide distinct goods or services within a contract, such as a project contract for installation of energy conservation measures and post-installation O&M services. In these cases the Company separates the contract into more than one performance obligation. If a contract is separated into more than one performance obligation, the Company allocates the total transaction price to each performance obligation in an amount based on the estimated relative standalone selling prices of the promised goods or services underlying each performance obligation.

Backlog

The Company’s remaining performance obligations (hereafter referred to as “backlog”) represent the unrecognized revenue value of the Company’s contract commitments. The Company’s backlog may vary significantly each reporting period based on the timing of major new contract commitments and the backlog may fluctuate with currency movements. In addition, our customers have the right, under some circumstances, to terminate contracts or defer the timing of the Company’s services and their payments to the Company. At September 30, 2020, the Company had backlog of $2,154,526 of which approximately 31% is anticipated to be recognized as revenue in the next twelve months and the remaining, thereafter.

The Company applied the practical expedient for certain revenue streams to exclude the value of remaining performance obligations for (i) contracts with an original expected term of one year or less, or (ii) contracts for which the Company recognizes revenue in proportion to the amount it has the right to invoice for services performed.

Contract Acquisition Costs

The Company accounts for certain acquisition costs over the life of the contract, consisting primarily of commissions when paid. Commission costs are incurred commencing at contract signing. Commission costs are allocated across all performance obligations and deferred and amortized over the contract term on a progress toward completion basis.

As of September 30, 2020 and December 31, 2019, $1,735 of capitalized commission costs related to contracts that were not completed were included in other assets in the accompanying condensed consolidated balance sheets. For contracts that have a duration of less than one year, the Company follows a practical expedient and expenses these costs when incurred. During the three and nine months ended September 30, 2020 and 2019, the amortization of commission costs related to contracts was not material and was included in the accompanying condensed consolidated statements of income.

The Company capitalizes costs incurred related to the development of projects prior to contract signing as it is partial fulfillment of its performance obligations. Capitalized project development costs include only those costs incurred in connection with the development of energy projects, primarily direct labor, interest costs, outside contractor services, consulting fees, legal fees and travel, if incurred after a point in time where the realization of related revenue becomes probable. Project development costs incurred prior to the probable realization of revenue are expensed as incurred. The Company classifies as a current asset those project development costs that are expected to proceed to construction activity in the twelve months that follow. The Company periodically reviews these balances and writes off any amounts where the realization of the related revenue is no longer probable. Project development costs of $1,228 and $1,080 were included in other long-term assets in the accompanying condensed consolidated balance sheets as of September 30, 2020 and December 31, 2019, respectively. During the three months ended September 30, 2020 and 2019, $3,611 and $2,048, respectively, of project development costs were recognized in the condensed consolidated statements of income on projects that converted to customer contracts. During the nine months ended September 30, 2020 and 2019, $9,546 and $13,081, respectively, of project development costs were recognized in the condensed consolidated statements of income on projects that converted to customer contracts.

No impairment charges in connection with the Company’s commission costs or project development costs were recorded during the nine months ended September 30, 2020 and 2019.

4. BUSINESS ACQUISITIONS AND RELATED TRANSACTIONS

The Company accounts for acquisitions using the acquisition method in accordance with ASC 805, Business Combinations. The purchase price for each is allocated to the net assets based on their estimated fair values at the date of each acquisition. The excess purchase price over the estimated fair value of net assets acquired, which are calculated using level 3 inputs per the fair value hierarchy as defined in Note 10, are recorded as goodwill. Intangible assets, if identified, are recorded and are amortized over periods ranging from one to fifteen years. See Note 5 for additional information.

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(In thousands) (Unaudited) (Continued)

During the three and nine months ended September 30, 2020, the Company did not complete any acquisitions.

The results of acquired assets since the dates of the acquisitions have been included in the Company’s operations as presented in the accompanying condensed consolidated statements of income, condensed consolidated statements of comprehensive income and condensed consolidated statements of cash flows.

5. GOODWILL AND INTANGIBLE ASSETS

The changes in the carrying value of goodwill attributable to each reporting unit are as follows:

	U.S. Regions		U.S. Federal		Canada		Non-solar DG		Other		Total
Carrying Value of Goodwill
Balance, December 31, 2019	$	26,705	$	3,981	$	3,369	$	—	$	24,359	$	58,414
Currency effects	—		—		(88)		—		(154)		(242)
Balance, September 30, 2020	$	26,705	$	3,981	$	3,281	$	—	$	24,205	$	58,172
Accumulated Goodwill Impairment
Balance, December 31, 2019	$	—	$	—	$	(1,016)	$	—	$	—	$	(1,016)
Balance, September 30, 2020	$	—	$	—	$	(1,016)	$	—	$	—	$	(1,016)

The Company performs its annual goodwill impairment testing in the fourth quarter of each year, or more frequently if an event occurs or circumstances change that would more-likely-than-not reduce the fair value of a reporting unit below its carrying amount. During the Company’s annual goodwill impairment testing in 2019, all reporting units had fair values that exceeded their carrying values by at least 15%. If the Company believes that one or more indicators of impairment have occurred, then the Company will perform an impairment test. The Company has the option to perform a qualitative assessment (commonly referred to as “step zero” test) to determine whether further quantitative analysis for impairment of goodwill and indefinite-lived intangible assets is necessary. The qualitative assessment includes a review of macroeconomic conditions, industry and market considerations, internal cost factors, and the Company’s own overall financial and share price performance, among other factors. If, after assessing the totality of events or circumstances the Company determines that it is not more-likely-than-not that the fair value of a reporting unit is less than its carrying amount, the Company does not need to perform a quantitative analysis. Upon assessment, the Company concluded it was not more likely than not that the fair value of the reporting units were less than the carrying value of the reporting units as of September 30, 2020. The Company will monitor future results and will perform a test if indicators trigger an impairment review. At this time, the Company has not deemed the impact that the current macroeconomic environment surrounding the COVID-19 pandemic has or is expected to have on the business to be a triggering event for impairment purposes.

Separable intangible assets that are not deemed to have indefinite lives are amortized over their useful lives. The Company annually assesses whether a change in the life over which the Company’s assets are amortized is necessary, or more frequently if events or circumstances warrant.

Acquired intangible assets other than goodwill that are subject to amortization include customer contracts, customer relationships, non-compete agreements, technology and trade names. Customer contracts are amortized ratably over the period of the acquired customer contracts ranging in periods from approximately one to five years. All other acquired intangible assets are amortized over periods ranging from approximately four to fifteen years, as determined by the nature of the respective intangible asset. The Company did not complete any acquisitions nor acquire any intangible assets during the nine months ended September 30, 2020.

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(In thousands) (Unaudited) (Continued)

The gross carrying amount and accumulated amortization of intangible assets are as follows:

	As of September 30, 2020		As of December 31, 2019
Gross Carrying Amount
Customer contracts	$	7,847	$	7,904
Customer relationships	12,634		12,749
Non-compete agreements	3,021		3,037
Technology	2,719		2,732
Trade names	542		544
Total gross carrying amount	26,763		26,966
Accumulated Amortization
Customer contracts	7,847		7,844
Customer relationships	11,585		11,236
Non-compete agreements	3,021		3,037
Technology	2,706		2,704
Trade names	532		531
Total accumulated amortization	25,691		25,352
Intangible assets, net	$	1,072	$	1,614

Amortization expense is as follows:

		Three Months Ended September 30,				Nine Months Ended September 30,
Asset type	Location	2020		2019		2020		2019
Customer contracts	Cost of revenues	$	15	$	22	$	60	$	67
All other intangible assets	Selling, general and administrative expenses	157		202		468		614
Total		$	172	$	224	$	528	$	681

6. ENERGY ASSETS

Energy assets consist of the following:

	September 30, 2020		December 31, 2019
Energy assets	$	885,148	$	767,331
Less - accumulated depreciation and amortization	(215,009)		(187,870)
Energy assets, net	$	670,139	$	579,461

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(In thousands) (Unaudited) (Continued)

Included in the above energy assets are financing lease assets and associated accumulated depreciation and amortization, as follows:

	September 30, 2020		December 31, 2019
Financing lease assets	$	42,402	$	42,402
Less - accumulated depreciation and amortization	(7,865)		(6,268)
Financing lease assets, net	$	34,537	$	36,134

Depreciation and amortization expense on the above energy assets, net of deferred grant amortization, included in the condensed consolidated statements of income is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
Location	2020		2019		2020		2019
Cost of revenues	$	9,547	$	8,843	$	28,496	$	26,338

Included in the above depreciation and amortization expense on energy assets is depreciation and amortization on financing lease assets, as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
Location	2020		2019		2020		2019
Cost of revenues	$	533	$	533	$	1,597	$	1,597

The Company evaluates long-lived assets for impairment as events or changes in circumstances indicate the carrying value of these assets may not be fully recoverable. Examples of such triggering events applicable to our assets include a significant decrease in the market price of a long-lived asset or asset group or a current-period operating or cash flow loss combined with a history of operating or cash flow losses or a projection or forecast that demonstrates continuing losses associated with the use of a long-lived asset or asset group. The Company performs its annual long-lived asset impairment testing in the fourth quarter of each year. In addition to the annual impairment test, the Company regularly assesses whether a triggering event has occurred which would require interim impairment testing.

During the three months ended September 30, 2020, the Company performed an engine overhaul on one of its energy assets, however, the engine consistently failed to achieve emissions compliance and the Company considered the engine unsalvageable. As a result of this event, the Company performed an impairment analysis on this energy asset group and recorded an impairment charge of $1,028, which fully impaired this asset group. The impairment charge is included in selling, general and administrative expenses within the condensed consolidated statements of income for the three and nine months ended September 30, 2020.

The Company assessed the impact that the current macroeconomic environment surrounding the COVID-19 pandemic has or is expected to have on the business, and concluded that it was not a triggering event for impairment purposes and there was no indication of impairment of long-lived assets, except as indicated above, for the nine months ended September 30, 2020.

The Company capitalizes interest costs relating to construction financing during the period of construction, which is included in energy assets, net in the Company’s condensed consolidated balance sheets. Capitalized interest is amortized to cost of revenues in the Company’s condensed consolidated statements of income on a straight line basis over the useful life of the associated energy asset.

The Company capitalized interest costs as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Capitalized interest	$	1,096	$	632	$	2,870	$	2,210

As of September 30, 2020 and December 31, 2019, there are three ESPC asset projects which are included within energy assets, net on the Company’s condensed consolidated balance sheets. The Company controls and operates the assets as well as obtains financing during the construction period of the assets. As the Company has an obligation to the customer for performance of the

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(In thousands) (Unaudited) (Continued)

asset, the Company records a liability associated with these energy assets, although, the customer is responsible for payments to the lender based on the energy asset’s production. As of September 30, 2020 and December 31, 2019, the liabilities recognized in association with these assets were $11,077 and $10,243, respectively, of which $225 and $827, respectively, have been classified as the current portion and are included in accrued expenses and other current liabilities. The remainder is included in other liabilities in the accompanying condensed consolidated balance sheets.

During the three months ended June 30, 2020, the Company acquired one energy project, which did not constitute a business in accordance with ASC 805-50, Business Combinations. The Company acquired the energy project in exchange for a total purchase price of $1,251, which included cash of $1,031 paid by the Company, issuance of a promissory note payable to the sellers of $204, detailed further in Note 16, and $16 of rollover equity in connection with shares of one of the Company’s subsidiaries issued to the sellers. As of September 30, 2020, the Company has remaining deferred purchase price consideration on previously closed projects of $1,446 that will be paid upon final completion of the respective projects and throughout 2020. The Company has a definitive agreement from prior periods, which has recently been amended, to purchase eight additional solar projects from developers for a total purchase price of $10,242, of which the Company has not made any payments to the developers for those projects.

As of September 30, 2020, the Company had $1,484 in asset retirement obligations (“AROs”) assets recorded in project assets, net of accumulated depreciation, and $1,622 in ARO liabilities recorded in accrued expenses and other current liabilities and other liabilities. During the three and nine months ended September 30, 2020, the Company recorded $20 and $58, respectively, of depreciation expense related to the ARO assets. During the three and nine months ended September 30, 2020, the Company recorded $21 and $64, respectively, in accretion expense to the ARO liabilities, which is reflected in the accretion of ARO and contingent consideration on the condensed consolidated statements of cash flows. The Company’s current ARO liabilities relate to the removal of equipment and pipelines at certain renewable gas projects and obligations related to the decommissioning of certain solar facilities and wind turbines.

7. INCOME TAXES

The Company recorded a provision for income taxes of $3,100 and $939 for the three months ended September 30, 2020 and 2019, respectively. The Company recorded a provision for income taxes of $597 and $2,000 for the nine months ended September 30, 2020 and 2019, respectively. The estimated effective annualized tax rate impacted by the period discrete items is 14.9% for the three months ended September 30, 2020, compared to a 10.1% of estimated effective annualized tax rate for the three months ended September 30, 2019. The estimated effective annualized tax rate impacted by the period discrete items is 1.8% for the nine months ended September 30, 2020, compared to a 9.2% of estimated effective annualized tax rate for the nine months ended September 30, 2019.

The principal reasons for the difference between the statutory rate and the estimated annual effective rate for 2020 were the effects of investment tax credits to which the Company is entitled from solar plants which have been placed into service or are forecasted to be placed into service during 2020, the tax deductions related to the Section 179D deduction, the tax rate benefits associated with net operating loss carryback made possible by the passing of the CARES Act on March 27, 2020 and tax basis adjustments on certain partnership flip transactions. The principal reason for the difference between the statutory rate and the estimated annual effective rate for 2019 were the effects of investment tax credits to which the Company is entitled from solar plants which have been placed into service or were forecasted to be placed into service during 2019.

The investment tax credits and production tax credits to which the Company may be entitled fluctuate from year to year based on the cost of the renewable energy plants the Company places or expects to place in service and production levels at company owned facilities in that year. As part of the Tax Extender and Disaster Relief Act of 2019, signed into law December 20, 2019, Section 179D was extended through December 31, 2020.

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(In thousands) (Unaudited) (Continued)

A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:

	Gross Unrecognized Tax Benefits
Balance, December 31, 2019	$	400
Balance, September 30, 2020	$	400

At September 30, 2020 and December 31, 2019, the Company had approximately $80 of total gross unrecognized tax benefits (both net of the federal benefit on state amounts) representing the amount of unrecognized tax benefits that, if recognized, would favorably affect the effective income tax rate in any future periods.

The Company has presented all deferred tax assets and liabilities as noncurrent, net liabilities on its condensed consolidated balance sheets as of September 30, 2020, and December 31, 2019.

8. LEASES

The Company enters into a variety of operating lease agreements through the normal course of its business including certain administrative offices. The leases are long-term, non-concealable real estate lease agreements, expiring at various dates through fiscal 2028. The agreements generally provide for fixed minimum rental payments and the payment of utilities, real estate taxes, insurance and repairs. The Company also leases certain land parcels related to our energy projects, expiring at various dates through fiscal 2050. The office and land leases make up a significant portion of the Company’s operating lease activity. Many of these leases have one or more renewal options that allow the Company, at its discretion, to renew the lease for six months to seven years. Only renewal options that the Company believed were likely to be exercised were included in our lease calculations. Many land leases include minimum lease payments that increase when the related project becomes operational. In these cases, the commercial operation date was estimated by the Company and used to calculate the estimated minimum lease payments.

Supplemental balance sheet information related to leases at September 30, 2020 and December 31, 2019 is as follows:

	September 30, 2020			December 31, 2019
Operating Leases:
Operating lease assets	$	36,336		$	32,791
Current operating lease liabilities	6,010			5,802
Long-term portions of operating lease liabilities	32,509			29,101
Total operating lease liabilities	$	38,519		$	34,903
Weighted-average remaining lease term	11 years			11 years
Weighted-average discount rate	6.0		%	6.3		%
Financing Leases:
Energy assets, net	$	34,537		$	36,134
Current portions of financing lease liabilities	4,746			4,997
Long-term financing lease liabilities, less current portions and net of deferred financing fees	21,352			23,500
Total financing lease liabilities	$	26,098		$	28,497
Weighted-average remaining lease term	16 years			17 years
Weighted-average discount rate	11.9		%	11.8		%

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(In thousands) (Unaudited) (Continued)

The costs related to the Company’s leases are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Operating Lease:
Operating lease costs	$	2,001	$	1,913	$	5,933	$	5,660
Financing Lease:
Amortization expense	533		533		1,597		1,597
Interest on lease liabilities	723		854		2,282		2,750
Total lease costs	$	3,257	$	3,300	$	9,812	$	10,007

The Company’s estimated minimum future lease obligations under our leases are as follows: 

	Operating Leases		Financing Leases
Year ended December 31,
2020	$	2,339	$	4,014
2021	7,342		6,792
2022	6,716		5,178
2023	5,381		3,676
2024	4,500		2,565
Thereafter	28,115		24,080
Total minimum lease payments	$	54,393	$	46,305
Less: interest	15,874		20,207
Present value of lease liabilities	$	38,519	$	26,098

The Company has determined that certain power purchase agreements (“PPAs”) contain a lease component in accordance with ASC 840, Leases. The Company recognized $2,261 and $6,546 of operating lease revenue under these agreements during the three and nine months ended September 30, 2020, respectively, which was reflected in revenues on the condensed consolidated statements of income. The Company recognized $2,243 and $6,737 of operating lease revenue under these agreements during the three and nine months ended September 30, 2019, respectively, which was reflected in revenues on the condensed consolidated statements of income.

Sale-Leaseback

Most of the solar photovoltaic (“solar PV”) projects sold to date under the sale-leaseback program have been determined by the Company to be financing leases. The Company defers any gain or loss, representing the excess or shortfall of cash received from the investor compared to the net book value of the asset in the Company’s condensed consolidated balance sheets at the time of the sale. The Company records the long term portion of any deferred gain or loss in its condensed consolidated balance sheets in other liabilities and other assets, respectively, and the current portion in accrued expenses and other current liabilities and prepaid expenses and other current assets. The deferred amounts are amortized over the lease term and are included in cost of revenues in its condensed consolidated statements of income. Net gains from amortization expense in cost of revenues related to deferred gains and losses was $57 and $57 for the three months ended September 30, 2020 and 2019, respectively. Net gains from amortization expense in cost of revenues related to deferred gains and losses was $170 and $172 for the nine months ended September 30, 2020 and 2019, respectively.

During the third quarter of 2018, the Company entered into an agreement with an investor which gives us the option to sell and contemporaneously lease back solar PV projects through August 2019 up to a maximum funding amount of $100 million. In January 2020, the Company amended the August 2018 agreement with the investor to extend the end date of the agreement to November 24, 2020 and increase the maximum funding amount up to $150 million. During the nine months ended September 30,

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(In thousands) (Unaudited) (Continued)

2020, the Company completed one acquisition of a solar PV project and $130 million remained available under the lending commitment.

A summary of amounts related to sale leasebacks in the Company’s condensed consolidated balance sheets is as follows:

	September 30, 2020		December 31, 2019
Financing lease assets, net	$	34,537	$	36,134
Deferred loss, short-term, net	115		115
Deferred loss, long-term, net	1,715		1,801
Total deferred loss	$	1,830	$	1,916
Financing lease liabilities, short-term	4,746		4,997
Financing lease liabilities, long-term	21,352		23,500
Total financing lease liabilities	$	26,098	$	28,497
Deferred gain, short-term, net	345		345
Deferred gain, long-term, net	5,206		5,463
Total deferred gain	$	5,551	$	5,808

9. COMMITMENTS AND CONTINGENCIES

The Company from time to time issues letters of credit and performance bonds, with their third-party lenders, to provide collateral.

Legal Proceedings

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

Commitments as a Result of Acquisitions

In August 2018, the Company completed an acquisition which provided for a revenue earn-out contingent upon the acquired business meeting certain cumulative revenue targets over five years from the acquisition date. The Company evaluated financial forecasts of the acquired business and concluded that the fair value of this earn-out was approximately $555, which was subsequently increased to $678 as of December 31, 2019 which remained consistent at September 30, 2020, and is recorded in other liabilities on the condensed consolidated balance sheets. The contingent consideration will be paid annually, beginning in May 2020, if any of the cumulative revenue targets are achieved. No payments have been made to date. The fair value of the earn-out will be re-evaluated at each reporting period and adjustments will be recorded as needed. See Note 10 for additional information.

In November 2018, the Company completed an acquisition of certain lease options, which provided for an earn-out if the lease option is exercised and if certain financial metrics are achieved. The Company evaluated the acquired lease options and concluded that the fair-value of this contingent liability was approximately $363, which was subsequently increased to $378 at December 31, 2019 which remained consistent at September 30, 2020, and is recorded in accrued expenses and other current liabilities and other liabilities on the condensed consolidated balance sheets. Payments will be made when milestones are achieved. The contingent liability will be re-evaluated at each reporting period and adjustments will be recorded as needed.

In April 2020, the Company completed an acquisition which provided for a profit earn-out contingent upon the acquired project meeting certain financial return targets. The Company evaluated the financial forecasts of the acquired asset and concluded that fair value of the earn-out was $0 at completion of the acquisition which will be re-evaluated at each reporting period. The contingent consideration will be paid annually beginning in 2021, if the financial return targets are achieved.

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(In thousands) (Unaudited) (Continued)

10. FAIR VALUE MEASUREMENT

The Company recognizes certain financial assets and liabilities at fair value on a recurring basis (at least annually). 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 upon unadjusted quoted prices for identical instruments traded in active markets.

Level 2: Inputs are based upon 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 the Company’s financial instruments measured at fair value on a recurring basis:

		Fair Value as of
	Level	September 30, 2020		December 31, 2019
Assets:
Interest rate swap instruments	2	$	—	$	15
Commodity swap instruments	2	—		198
Total assets		$	—	$	213
Liabilities:
Interest rate swap instruments	2	$	11,128	$	6,236
Commodity swap instruments	2	44		—
Make-whole provisions	2	1,352		918
Contingent consideration	3	678		678
Total liabilities		$	13,202	$	7,832

The fair value of the Company’s interest rate swaps was determined using cash flow analysis on the expected cash flow of the contract in combination with observable market-based inputs, including interest rate curves and implied volatility. As part of this valuation, the Company considered the credit ratings of the counterparties to the interest rate swaps to determine if a credit risk adjustment was required.

The fair value of the Company’s commodity swaps was determined using a cash flow analysis on the expected cash flow of the contract in combination with observable forward price inputs obtained from a third-party pricing source. As part of this valuation, the Company considered the credit ratings of the counterparties to the commodity swaps to determine if a credit risk adjustment was required.

The fair value of the Company’s make-whole provisions was determined by either comparing it against the rates of similar debt instruments under similar terms without a make-whole provision obtained from various highly rated third-party pricing sources or evaluating the present value of the prepayment fee.

The fair value of the Company’s contingent consideration liabilities were determined by evaluating the acquired asset’s future financial forecasts and evaluating which, if any, of the cumulative revenue targets, financial metrics and/or milestones are likely to be met. The Company has classified contingent consideration related to certain acquisitions within level 3 of the fair value hierarchy because the fair value is derived using significant unobservable inputs, which include discount rates and probability-weighted cash flows. The Company determined the fair value of its contingent consideration obligations based on a probability-weighted income approach derived from financial performance estimates and probability assessments of the attainment of certain

23

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(In thousands) (Unaudited) (Continued)

targets. The Company establishes discount rates to be utilized in its valuation models based on the cost to borrow that would be required by a market participant for similar instruments.

The key assumptions as of September 30, 2020 related to the contingent consideration from the acquisition of certain assets of Chelsea Group Limited, used in the model include a discount rate of 18% for purposes of discounting the low and base case scenarios associated with achievement of the financial based earn-out. The probabilities assigned to these scenarios were 50% for both the low and base case scenarios. An increase or decrease in the probability of achievement of any scenario could result in a significant increase or decrease to the estimated fair value of the contingent consideration liability.

The following table sets forth a summary of changes in fair value of contingent liability classified as level 3 for the nine months ended September 30, 2020 and September 30, 2019:

	Nine Months Ended September 30, 2020		Nine Months Ended September 30, 2019
Contingent consideration liability balance at December 31, 2019 and 2018	$	678	$	600
Changes in the fair value of contingent consideration obligation	—		50
Contingent consideration liability balance at September 30, 2020 and 2019	$	678	$	650

The fair value of financial instruments is determined by reference to observable market data and other valuation techniques, as appropriate. The only category of financial instruments where the difference between fair value and recorded book value is notable is long-term debt. At September 30, 2020 and December 31, 2019 the fair value of the Company’s long-term debt was estimated using discounted cash flows analysis, based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements which are considered to be level 2 inputs. There have been no transfers in or out of level 2 or level 3 financial instruments for the nine months ended September 30, 2020 and the year ended December 31, 2019.

Based on the analysis performed, the fair value and the carrying value of the Company’s long-term debt, excluding financing leases, are as follows:

	As of September 30, 2020				As of December 31, 2019
	Fair Value		Carrying Value		Fair Value		Carrying Value
Long-term debt (Level 2)	$	318,816	$	313,550	$	309,377	$	307,508

The Company is also required periodically to measure certain other assets at fair value on a nonrecurring basis, including long-lived assets, goodwill and other intangible assets. There were no assets recorded at fair value on a non-recurring basis at September 30, 2020 or December 31, 2019.

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(In thousands) (Unaudited) (Continued)

11. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

The following table presents information about the fair value amounts of the Company’s derivative instruments as follows at September 30, 2020 and December 31, 2019:

		Derivatives as of
		September 30, 2020		December 31, 2019
	Balance Sheet Location	Fair Value		Fair Value
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other assets	$	—	$	15
Interest rate swap contracts	Other liabilities	$	10,816	$	6,210
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other liabilities	$	312	$	26
Commodity swap contracts	Other assets	$	—	$	198
Commodity swap contracts	Other liabilities	$	44	$	—
Make-whole provisions	Other liabilities	$	1,352	$	918

During the three months ended September 30, 2020, as a result of a qualitative assessment of the original volatility inputs used to calculate the hedge effectiveness related to two interest rate swaps that were executed in May 2020, the Company de-designated these interest rate swaps as effective hedging instruments and reclassified $303 out of accumulated other comprehensive income (“AOCI”) into other expenses, net.

As of September 30, 2020, all but four of the Company’s freestanding derivatives were designated as hedging instruments. As of December 31, 2019 all but three of the Company’s freestanding derivatives were designated as hedging instruments.

The following tables present information about the effects of the Company’s derivative instruments on the condensed consolidated statements of income and condensed consolidated statements of comprehensive income:

		Amount of (Gain) Loss Recognized in Net Income
	Location of (Gain) Loss Recognized in Net Income	Three Months Ended September 30,				Nine Months Ended September 30,
		2020		2019		2020		2019
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	503	$	44	$	908	$	(6)
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	287	$	(3)	$	287	$	66
Commodity swap contracts	Other expenses, net	194		(31)		241		(203)
Make-whole provisions	Other expenses, net	(27)		(150)		443		(935)

	Nine Months Ended September 30, 2020
Derivatives Designated as Hedging Instruments:
Accumulated loss in AOCI at the beginning of the period	$	(4,742)
Unrealized loss recognized in AOCI	(4,623)
Loss reclassified from AOCI to other expenses, net	1,211
Net loss on derivatives	(3,412)
Accumulated loss in AOCI at the end of the period	$	(8,154)

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(In thousands) (Unaudited) (Continued)

The following tables present a listing of the Company’s active derivative instruments as of September 30, 2020:

Active Interest Rate Swap	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
3-Year, 2.46% Fixed	March 2018	December 2020	17,100		Not 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-Year, 5.30% Fixed	February 2006	February 2021	3,256		Designated
15.5-Year, 5.40% Fixed	September 2008	March 2024	13,081		Designated

Active Commodity Swap	Effective Date	Expiration Date	Initial Notional Amount (Volume)	Commodity Measurement	Status
1-Year, $2.70 MMBtu Fixed	May 2020	April 2021	435,810	MMBtus	Not Designated

Other Derivatives	Classification	Effective Date	Expiration Date	Fair Value ($)
Make-whole provisions	Liability	June/August 2018	December 2038	$	534
Make-whole provisions	Liability	August 2016	April 2031	432
Make-whole provisions	Liability	April 2017	February 2034	386

12. INVESTMENT FUNDS AND OTHER VARIABLE INTEREST ENTITIES

Investment Funds

In each of September 2015, June 2017, June 2018, October 2018, and December 2019, the Company formed an investment fund with a different third-party investor which granted the applicable investor ownership interests in the net assets of certain of the Company’s renewable energy project subsidiaries. The Company currently has five such investment funds each with a different third-party investor.

The Company consolidates the investment funds, and all inter-company balances and transactions between the Company and the investment funds are eliminated in its condensed consolidated financial statements. The Company determined that the investment funds meet the definition of a variable interest entity (“VIE”). The Company uses a qualitative approach in assessing the consolidation requirements for VIEs that focuses on determining whether the Company has the power to direct the activities of the VIE that most significantly affect the VIE’s economic performance and whether the Company has the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE.

The Company has considered the provisions within the contractual arrangements that grant it power to manage and make decisions that affect the operation of these VIEs, including determining the solar energy systems and associated long-term customer contracts to be sold or contributed to the VIEs, and installation, operation and maintenance of the solar energy systems. The Company considers that the rights granted to the other investors under the contractual arrangements are more protective in

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

nature rather than participating rights. As such, the Company has determined it is the primary beneficiary of the VIEs for all periods presented. The Company evaluates its relationships with VIEs on an ongoing basis to ensure that it continues to be the primary beneficiary.

Under the related agreements, cash distributions of income and other receipts by the funds, net of agreed-upon expenses and estimated expenses, tax benefits and detriments of income and loss, and tax benefits of tax credits, are assigned to the funds’ investor and Company’s subsidiaries as specified in contractual arrangements. Certain of these arrangements have call and put options to acquire the investor’s equity interest as specified in the contractual agreements. See Note 13 for additional information on the call and put options.

A summary of amounts related to the investment funds in the Company’s condensed consolidated balance sheets is as follows:

	September 30,		December 31,
	2020(1)		2019(1)
Cash and cash equivalents	$	9,179	$	4,666
Restricted cash	1,248		586
Accounts receivable, net	867		532
Costs and estimated earnings in excess of billings	2,168		1,125
Prepaid expenses and other current assets	128		108
Total VIE current assets	13,590		7,017
Property and equipment, net	1,266		1,266
Energy assets, net	145,008		142,456
Operating lease assets	6,483		6,511
Other assets	331		1,662
Total VIE assets	$	166,678	$	158,912
Current portions of long-term debt and financing lease liabilities	$	2,243	$	2,252
Accounts payable	594		2,006
Accrued expenses and other current liabilities	1,553		2,203
Current portions of operating lease liabilities	121		102
Total VIE current liabilities	4,511		6,563
Long-term debt and financing lease liabilities, net of current portion and deferred financing fees	23,626		24,654
Long-term operating lease liabilities, net of current portion	6,302		6,180
Other liabilities	895		1,171
Total VIE liabilities	$	35,334	$	38,568

(1) The amounts in the above table are reflected in Note 1 on the Company’s condensed consolidated balance sheets. See the Company’s condensed consolidated balance sheets for additional information.

Other Variable Interest Entities

The Company follows guidance on the consolidation of VIEs that requires companies to utilize a qualitative approach to determine whether it is the primary beneficiary of a VIE. The process for identifying the primary beneficiary of a VIE requires consideration of the factors that indicate a party has the power to direct the activities that most significantly impact the joint ventures economic performance, including powers granted to the joint ventures program manager, powers contained in the joint venture governing board and, to a certain extent, a company's economic interest in the joint venture. The Company analyzes its joint ventures and classifies them as either:

•a VIE that must be consolidated because the Company is the primary beneficiary or the joint venture is not a VIE and the Company holds the majority voting interest with no significant participative rights available to the other partners; or

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(In thousands) (Unaudited) (Continued)

•a VIE that does not require consolidation and is treated as an equity method investment because the Company is not the primary beneficiary or the joint venture is not a VIE and the Company does not hold the majority voting interest.

Many of the joint ventures are deemed to be VIEs because they lack sufficient equity to finance the activities of the joint venture.

Unconsolidated joint ventures are accounted for under the equity method. For those joint ventures, the Company's investment balances for the joint venture are included in other assets on the condensed consolidated balance sheets and the Company’s pro rata share of net income or loss is included in operating income. The Company’s investments in equity method joint ventures on the condensed consolidated balance sheets as of September 30, 2020 and December 31, 2019 were a net asset of $1,370 and $1,292, respectively. During the three and nine months ended September 30, 2020, the Company recognized expense of $50 and $127, respectively, from equity method joint ventures. During the three and nine months ended September 30, 2019, the Company recognized expense of $73 and $147, respectively from equity method joint ventures.

13. REDEEMABLE NON-CONTROLLING INTERESTS

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the third quarter of 2015 has the right, beginning on the fifth anniversary of the final funding of the variable rate construction and term loans due 2023 and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned subsidiary, a call option. The Company’s investment fund, which was formed in the third quarter of 2015, also includes a right, beginning on the sixth anniversary of the final funding and extending for one year, for the non-controlling interest holder to elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the second quarter of 2017 has the right, beginning on the fifth anniversary of the final funding of the non-controlling interest holder and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned subsidiary, a call option. The Company’s investment fund formed in the second quarter of 2017 also includes a right, beginning on the sixth anniversary of the final funding and extending for one year, for the non-controlling interest holder to elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the second quarter of 2018 has the right, beginning on the fifth anniversary of the investment fund’s final project being placed into service and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned subsidiary, a call option. The Company’s investment fund formed in the second quarter of 2018 also includes a right, upon the expiration of the call option and extending for six months, for the non-controlling interest holder to elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the fourth quarter of 2018 has the right, beginning on the fifth anniversary on the last projects placed in-service date and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned subsidiary, a call option. The Company’s investment fund formed in the fourth quarter of 2018 also includes a right, upon the expiration of the call option and extending for six months, for the non-controlling interest partner to elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the fourth quarter of 2019 has the right, beginning on the fifth anniversary on the last projects placed in-service date and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned subsidiary, a call option. The Company’s investment fund formed in the fourth quarter of 2019 also includes a right, beginning six months after the fifth anniversary of the final funding and extending for one year, for the non-controlling interest partner to elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The purchase price for two of the investment funds investors’ interests under the call options is equal to the fair market value of such interest at the time the option is exercised. The purchase price for two of the investment funds investor’s interests under the call options is equal to the greater of (i) the fair market value of such interests at the time the option is exercised or (ii) 7% of the investors’ contributed capital balance at the time the option is exercisable. The purchase price for the remaining investment fund investor’s interests under the call options is equal to the greater of (i) the fair market value of such interests at the time the option is exercised or (ii) 5% of the investors’ contributed capital balance at the time the option is exercisable. The call options are

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(In thousands) (Unaudited) (Continued)

exercisable beginning on the date that specified conditions are met for each respective fund. None of the call options are expected to become exercisable prior to 2021.

The purchase price for two of the funds investors’ interests in the investment funds under the put options is the lessor of fair market value at the time the option is exercised and a specified amount, ranging from $659 - $917. The purchase price for the two of the remaining funds investors’ interest in the investment funds under the put options is the sum of (i) the fair market value at the time the option is exercised, and (ii) the closing costs incurred by the investor in connection with the exercise of the put option. The purchase price for the remaining fund investors’ interest in the investment funds under the put options is the lessor of fair market value at the time the option is exercised and the sum of (i) 5% of the investors’ contributed capital balance at the time the option is exercisable, and (ii) the fair market value of any unpaid tax law change losses incurred by the investor in connection with the exercise of the put option. The put options for the investment funds are exercisable beginning on the date that specified conditions are met for each respective fund. The put options are not expected to become exercisable prior to 2022.

Because the put options represents redemption features that are not solely within the control of the Company, the non-controlling interests in these funds are presented outside of permanent equity. Redeemable non-controlling interests are reported using the greater of their carrying value at each reporting date (which is impacted by attribution under the hypothetical liquidation at book value method) or their estimated redemption value in each reporting period. At both September 30, 2020 and December 31, 2019 redeemable non-controlling interests were reported at their carrying value totaling $36,421 and $31,616, respectively, as the carrying value at each reporting period was greater than the estimated redemption value.

14. EARNINGS PER SHARE AND OTHER EQUITY RELATED INFORMATION

Earnings Per Share

Basic earnings per share is calculated using the Company’s weighted-average outstanding common shares, including vested restricted shares. When the effects are not anti-dilutive, diluted earnings per share is calculated using the weighted-average outstanding common shares; the dilutive effect of convertible preferred stock, under the “if converted” method; and the treasury stock method with regard to warrants and stock options; all as determined under the treasury stock method.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Numerator:
Net income attributable to common shareholders	$	20,002	$	8,870	$	30,568	$	22,233
Adjustment for accretion of tax equity financing fees	(91)		—		(91)		—
Income attributable to common shareholders	$	19,911	$	8,870	$	30,477	$	22,233
Denominator:
Basic weighted-average shares outstanding	47,788		46,555		47,597		46,413
Effect of dilutive securities:
Stock options	1,313		1,138		1,188		1,262
Diluted weighted-average shares outstanding	49,101		47,693		48,785		47,675
Net income per share attributable to common shareholders:
Basic	$	0.42	$	0.19	$	0.64	$	0.48
Diluted	$	0.41	$	0.19	$	0.62	$	0.47
Potentially dilutive shares(1)	1,268		1,152		1,146		642
(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.

29

AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

Stock-based Compensation Expense

The Company recorded stock-based compensation expense, including expense related to the ESPP, as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Stock-based compensation expense	$	521	$	413	$	1,380	$	1,195

The compensation expense is included in selling, general and administrative expenses in the condensed consolidated statements of income. As of September 30, 2020, there was $11,970 of unrecognized compensation expense related to non-vested stock option awards that is expected to be recognized over a weighted-average period of 2.6 years.

No awards to individuals who were not either an employee or director of the Company were granted during the nine months ended September 30, 2020 or during the year ended December 31, 2019.

Stock Option Grants

The Company’s 2020 Stock Incentive Plan (the “2020 Plan”), was adopted by the Company’s Board of Directors in February 2020 and approved by its stockholders in May 2020. The 2020 Plan provides for the grant of incentive stock options, non-statutory stock options, stock appreciation rights, restricted stock awards and other stock-based awards. Upon its effectiveness, 5,000 shares of the Company’s Class A common stock were reserved for issuance under the 2020 Plan.

During the three months ended September 30, 2020, the Company granted 95 common stock options to certain employee and directors under its 2020 Stock Incentive Plan, which have a contractual life of ten years and vest over a five-year period. During the nine months ended September 30, 2020, the Company granted 376 common stock options to certain employees and directors under its 2010 and 2020 Stock Incentive Plans, which have a contractual life of ten years and vest over a five-year period.

Employee Stock Purchase Plan

In May 2020, the Company amended its 2017 Employee Stock Purchase Plan ("ESPP") which permits eligible employees to purchase up to an aggregate of 350 shares of the Company’s Class A common stock. This plan commenced December 1, 2017 and was previously amended on August 2018. The ESPP allows participants to purchase shares of common stock at a 5% discount from the fair market value of the stock as determined on specific dates at six-month intervals. During the nine months ended September 30, 2020 and 2019, the Company issued 28 and 22 shares, respectively, under the ESPP.

Share Repurchase Program

In April 2016, the Company’s Board of Directors authorized the repurchase of up to $10,000 of the Company’s Class A common stock from time to time on the open market in privately negotiated transactions. The Company’s Board of Directors authorized an increase in the Company’s share repurchase authorization to $15,000 of the Company's Class A common stock in February 2017 and to $17,553 of the Company's Class A common stock in August 2019, in each case, from time to time on the open market or in privately negotiated transactions. The timing and amount of any shares repurchased will be determined by the Company's management based on its evaluation of market conditions and other factors. Any repurchased shares will be available for use in connection with its stock plans and for other corporate purposes. The repurchase program has and will be funded using the Company's working capital and borrowings under its revolving line of credit. The Company accounts for share repurchases using the cost method. Under this method, the cost of the share repurchase is recorded entirely in treasury stock, a contra equity account. During the nine months ended September 30, 2020, the Company repurchased an immaterial amount of shares of common stock. During the three and nine months ended September 30, 2019, the Company repurchased 10 shares of common stock.

15. BUSINESS SEGMENT INFORMATION

The Company reports results under ASC 280, Segment Reporting. The Company’s reportable segments are U.S. Regions, U.S. Federal, Canada and Non-Solar Distributed Generation (“DG”). The Company’s 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, which include the construction of small-scale plants that the company owns or develops for customers that produce electricity, gas, heat or cooling from renewable sources of energy and O&M services. The Company’s Non-Solar DG segment

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AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

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 the Company owns and O&M services for customer owned small-scale plants. The “All Other” category offers enterprise energy management services, consulting services 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 reports of the Company’s chief operating decision maker do not include assets at the operating segment level. The accounting policies are the same as those described in the summary of significant accounting policies in Note 2 included in the Company’s annual report on Form 10-K for the year ended December 31, 2019 filed with the Securities and Exchange Commission on March 4, 2020.

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AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

An analysis of the Company’s business segment information and reconciliation to the condensed consolidated financial statements is as follows:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total Consolidated
Three Months Ended September 30, 2020
Revenues	$	92,944	$	118,303	$	12,263	$	28,251	$	30,746	$	282,507
Interest income	32		2		—		—		—		34
Interest expense	892		340		992		1,510		34		3,768
Depreciation and amortization of intangible assets	3,239		995		402		5,013		426		10,075
Unallocated corporate activity	—		—		—		—		—		(9,361)
Income before taxes, excluding unallocated corporate activity	7,225		16,121		446		2,391		3,967		30,150
Three Months Ended September 30, 2019
Revenues	$	84,079	$	71,258	$	12,665	$	21,875	$	22,149	$	212,026
Interest income	69		92		—		21		—		182
Interest expense	1,548		209		179		1,213		—		3,149
Depreciation and amortization of intangible assets	2,538		901		396		5,149		429		9,413
Unallocated corporate activity	—		—		—		—		—		(8,482)
Income before taxes, excluding unallocated corporate activity	3,350		10,967		1,577		977		881		17,752
Nine Months Ended September 30, 2020
Revenues	$	266,373	$	271,539	$	32,690	$	74,104	$	73,250	$	717,956
Interest income	102		76		—		16		—		194
Interest expense	4,563		1,431		1,329		3,683		67		11,073
Depreciation and amortization of intangible assets	9,002		2,953		1,174		15,720		1,231		30,080
Unallocated corporate activity	—		—		—		—		—		(30,104)
Income before taxes, excluding unallocated corporate activity	15,960		33,162		741		6,964		7,035		63,862
Nine Months Ended September 30, 2019
Revenues	$	227,896	$	169,337	$	27,696	$	66,370	$	69,022	$	560,321
Interest income	132		160		—		65		39		396
Interest expense	4,118		627		517		4,075		—		9,337
Depreciation and amortization of intangible assets	7,184		2,524		986		16,051		1,153		27,898
Unallocated corporate activity	—		—		—		—		—		(25,331)
Income before taxes, excluding unallocated corporate activity	5,530		26,631		1,529		5,758		7,592		47,040

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AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

16. DEBT

As of September 30, 2020 and December 31, 2019, the Company’s outstanding debt obligations are comprised of the following:

	Commencement Date	Maturity Date	Acceleration Clause(2)	Rate as of September 30, 2020		September 30, 2020		December 31, 2019
Senior secured credit facility, interest at varying rates monthly in arrears	Jun 2015	Jun 2024	NA	3.41	%	$	114,632	$	112,216
Variable rate term loan payable in semi-annual installments	Jan 2006	Feb 2021	Yes	2.48	%	350		625
Variable rate term loan payable in semi-annual installments	Jan 2006	Jun 2024	Yes	2.23	%	6,081		6,609
Term loan payable in quarterly installments	Mar 2011	Mar 2021	Yes	7.25	%	339		831
Term loan payable in monthly installments	Oct 2011	Jun 2028	NA	6.11	%	3,196		3,649
Variable rate term loan payable in quarterly installments	Oct 2012	May 2025	NA	2.48	%	39,936		28,217
Variable rate term loan payable in quarterly installments	Sep 2015	Mar 2023	NA	2.98	%	15,534		15,976
Term loan payable in quarterly installments	Aug 2016	Jul 2031	NA	4.95	%	3,378		3,769
Term loan payable in quarterly installments	Mar 2017	Mar 2028	NA	5.00	%	3,204		3,521
Term loan payable in monthly installments	Apr 2017	Apr 2027	NA	4.50	%	19,538		22,553
Term loan payable in quarterly installments	Apr 2017	Feb 2034	NA	5.61	%	2,479		2,706
Variable rate term loan payable in quarterly installments	Jun 2017	Dec 2027	NA	2.68	%	11,126		11,740
Variable rate term loan payable in quarterly installments	Feb 2018	Aug 2022	Yes	7.73	%	9,236		15,645
Term loan payable in quarterly installments	Jun 2018	Dec 2038	Yes	5.15	%	27,363		28,583
Variable rate term loan payable in semi-annual installments	Jun 2018	Jun 2033	Yes	2.28	%	8,665		9,003
Variable rate term loan payable in monthly/quarterly installments	Oct 2018	Oct 2029	Yes	2.65	%	8,583		9,092
Long term finance liability in semi-annual installments(3)	Jul 2019	Jul 2039	NA	0.28	%	3,732		3,841
Long term finance liability in semi-annual installments(3)	Nov 2019	July 2040	NA	—	%	8,312		8,794
Term loan payable in quarterly installments	Dec 2019	Dec 2021	Yes	6.50	%	15,655		27,226
Fixed rate note	Apr 2020	Apr 2040	NA	5.00	%	218		—
Construction revolver payable July 2021	Jul 2020	Jul 2022	Yes	1.98	%	10,659		—
Construction revolver payable Nov 2020	Jul 2020	Nov 2020	Yes	5.25	%	7,564		—
Financing leases(1)						26,098		28,497
						$	345,878	$	343,093
Less - current maturities						61,521		69,969
Less - deferred financing fees						6,230		6,943
Long-term debt and financing lease liabilities, net						$	278,127	$	266,181

(1) Financing leases do not include approximately $20,207 and $22,015 in future interest payments as of September 30, 2020 and December 31, 2019, respectively.

(2) These agreements have acceleration causes that, in the event of default, as defined, the payee has the option to accelerate payment terms and make due the remaining principal and the required interest balance according to the agreement.

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AMERESCO, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands) (Unaudited) (Continued)

(3) These agreements are sale-leaseback arrangements that provide for the sale of solar PV projects to a third party investor and the simultaneous leaseback of the projects. In accordance with Topic 842, Leases, these transactions are accounted for as failed sales as the Company retains control of the underlying assets and as such, are classified as financing liabilities. The low interest rates are the results of tax credits which were transferred to the counterparty.

Senior Secured Credit Facility - Revolver and Term Loan

In March 2020, the Company amended the Company’s senior secured credit facility which increased the total funded debt to EBITDA covenant ratio to a maximum of 3.75 for the year ended December 31, 2020. The amendment also increased the Eurocurrency Rate floor to 1% from 0%. The total commitment under the amended credit facility (revolving credit, term loan and swing line) remains unchanged, which is $185,000.

At September 30, 2020, funds of $45,668 are available for borrowing under the revolving credit facility.

April 2020 Note

In April 2020, the Company issued a note to a developer in connection with the acquisition of one energy project, discussed in Note 6. The note provides a principal amount of $218 and bears interest at a fixed rate of 5%. The principal and interest payments can be redeemed at any time after the issue date within 20 years before the note is expired after the issuance and prior to maturity in April 2040. At September 30, 2020, $218 was outstanding under this note.

May 2020 Credit Facility

In May 2020, the Company amended a non-recourse credit facility with two banks. The amended and restated credit facility replaces and extended the Company’s existing credit facility to May 27, 2025 from May 31, 2020. The amended credit facility provides an amended principal amount of $41,850. The amended credit facility bears interest at a rate of 2.25% above LIBOR. The interest rate increases by 0.125% above the base rate every three years following the date of execution. The principal and interest payments are due in quarterly installments. At September 30, 2020, $39,936 was outstanding under the amended credit facility, net of debt discount and deferred financing fees.

June 2020 Construction Revolver

In June 2020, the Company entered into a revolving credit agreement with a bank, with an aggregate borrowing capacity of $100,000 for use in financing the construction cost of its owned projects. The facility bears interest at (i) 1.5% above LIBOR or (ii) 0.5% above a base rate defined in the credit agreement, dependent on the type of borrowing requested by the Company. The revolving facility matures in November 2020, with all remaining unpaid amounts outstanding under the facility due at that time. As of September 30, 2020, the Company has drawn $7,564 under the construction revolving facility.

July 2020 Construction Revolver

In July 2020, the Company entered into a revolving credit agreement with a bank, with an aggregate borrowing capacity of $30,000 for use in financing the Company’s construction cost of energy projects. The facility may, at the Company’s request, be increased by up to an additional $20,000 after certain conditions have been met. The facility bears interest at a rate of 1.75% over LIBOR and matures in July 2022, with all remaining unpaid amounts outstanding under the facility due at that time.

The project loan drawn under the revolving facility matures at the earlier of (i) 12 months from the funding of project loan or (ii) July 17, 2022. As of September 30, 2020, $10,659 was outstanding under the revolving facility, net of debt discount and deferred financing fees. Funds of $18,956 are available for borrowing under this revolving facility.

17. SUBSEQUENT EVENT

On October 23, 2020, the Company amended a non-recourse credit facility with a bank. The amended and restated credit facility replaced and extended the Company's existing facility to March 31, 2026 from August 31, 2022. The amended credit facility provides an amended principal amount up to $50 million and bears interest at a rate of 6% above LIBOR. The principal and interest payments are due in quarterly installments. Within 60 days following October 23, 2020, the Company is required to maintain interest rate protection through hedging agreements covering an aggregate notional amount of not less than 50% of and not more than 95% of the aggregate outstanding principal amount of the loans.

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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, 2019 included in our Annual Report on Form 10-K for the year ended December 31, 2019 filed on March 4, 2020 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, or 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; and 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; and other characterizations of future events or circumstances are forward-looking statements. Currently, one of the most significant factors, however, is the potential adverse effect of the current pandemic of the novel coronavirus, or COVID-19, on our financial condition, results of operations, cash flows and performance and the global economy and financial markets. The extent to which COVID-19 impacts us, suppliers, customers, employees and supply chains will depend on future developments, which are highly uncertain and cannot be predicted with confidence, including the scope, severity and duration of the pandemic, the actions taken to contain the pandemic or mitigate its impact, and the direct and indirect economic effects of the pandemic and containment measures, among others. Moreover, you should interpret many of the risks identified in this report, as well as the risks set forth below, as being heightened as a result of the ongoing and numerous adverse impacts of COVID-19. 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 Annual Report on Form 10-K for the year ended December 31, 2019, Item 1A of our Quarterly Report on Form 10-Q for the quarter ended March 31, 2020 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 provider of energy efficiency solutions for facilities throughout North America and Europe. We provide solutions that enable customers to reduce their energy consumption, lower their operating and maintenance costs and realize environmental benefits. Our comprehensive set of services includes upgrades to a facility’s energy infrastructure and the construction and operation of small-scale renewable energy plants.

In addition to organic growth, strategic acquisitions of complementary businesses and assets have been an important part of our historical development. Since inception, we have completed numerous acquisitions, which have enabled us to broaden our service offerings and expand our geographical reach.

Key Factors and Trends

COVID-19 Update

In March 2020, the World Health Organization categorized Coronavirus Disease 2019 as a pandemic, and the President of the United States declared the COVID-19 outbreak a national emergency. We are closely monitoring the impact of the COVID-19 pandemic on all aspects of our business, including how it may impact our suppliers, customers, employees and supply chains. While we did not incur significant disruptions during the nine months ended September 30, 2020 from the COVID-19 pandemic, we are unable to predict the impact that the COVID-19 pandemic will have on our financial condition, results of operations and cash flows due to numerous uncertainties. These uncertainties include the scope, severity and duration of the pandemic, the

35

actions taken to contain the pandemic or mitigate its impact and the direct and indirect economic effects of the pandemic and containment measures, among others.

Further, the overall impact of COVID-19 on our condensed consolidated results of operations for the nine months ended September 30, 2020 was not material. However, the impact that COVID-19 will have on our consolidated results of operations throughout 2020 remains uncertain. We expect to experience delays in our project award conversions and potential construction slowdowns as a result of known shelter-in-place restrictions. We will continue to evaluate the nature and extent of these potential impacts to our business, consolidated results of operations, segment results, liquidity and capital resources.

Effects of Seasonality

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, 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. 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. See “Our business is affected by seasonal trends and construction cycles, and these trends and cycles could have an adverse effect on our operating results.” in Item 1A, Risk Factors of our Annual Report on Form 10-K for the year ended December 31, 2019 (“Annual Report”), and the risks described in Item 1A. Risk Factors in this Quarterly Report on Form 10-Q.

Backlog and Awarded Projects

Total construction backlog represents projects that are active within our ESPC 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 54 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 sub-contractor, 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, however, depending upon 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 becomes 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. Fully-contracted backlog begins converting into revenues generated from backlog over time using cost based input methods once construction has commenced. 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 Annual Report, and the risks described in Item 1A. Risk Factors in this Quarterly Report on Form 10-Q.

The overall impact of COVID-19 on our condensed consolidated results of operations for the nine months ended September 30, 2020 was not material. However, the impact that COVID-19 will have on our consolidated results of operations throughout 2020 remains uncertain. We expect to experience delays in our project award conversions and potential construction slowdowns as a result of known shelter-in-place restrictions. We will continue to evaluate the nature and extent of these potential impacts to our business, consolidated results of operations, segment results, liquidity and capital resources. 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 Annual Report, and the risks described in Item 1A. Risk Factors in the Quarterly Report on Form 10-Q for the quarter ended March 31, 2020.

As of September 30, 2020, we had fully-contracted backlog of approximately $1,033.7 million in expected future revenues under signed customer contracts for the installation or construction of projects; and we also had been awarded projects for which we had not yet signed customer contracts with estimated total future revenues of an additional $1,211.3 million. As of September 30,

36

2019, we had fully-contracted backlog of approximately $787.2 million in expected future revenues under signed customer contracts for the installation or construction of projects; and we also had been awarded projects for which we had not yet signed customer contracts with estimated total future revenues of an additional $1,434.9 million.

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. As of September 30, 2020 and 2019, our 12-month project backlog was $605.9 million and $437.7 million, respectively.

As of September 30, 2020, we had O&M backlog of approximately $1,120.8 million in expected future revenues under signed multi-year customer contracts for the delivery of O&M services. As of September 30, 2019, we had O&M backlog of approximately $908.9 million in expected future revenues under signed multi-year customer contracts for the delivery of O&M services. As of September 30, 2020 and 2019, our 12-month O&M backlog was $60.0 million and $60.6 million, respectively.

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 $784.6 million and $572.0 million as of September 30, 2020 and 2019, respectively.

Critical Accounting Policies and Estimates

This discussion and analysis of our financial condition and results of operations is based upon our condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, expense and related disclosures. The most significant estimates with regard to these condensed consolidated financial statements relate to our estimates of final construction contract profit in accordance with accounting for long-term contracts under the revenue recognition requirements of contracts with our customers, allowance for credit losses, inventory reserves, realization of project development costs, leases, fair value of derivative financial instruments, accounting for business acquisitions, stock-based awards, impairment of long-lived assets and goodwill, income taxes, self-insurance reserves and potential liability in conjunction with certain commitments and contingencies. Actual results could differ from those estimates.

Such estimates and assumptions are based on historical experience and on various other factors that management believes to be reasonable under the circumstances. Estimates and assumptions are made on an ongoing basis, and accordingly, the actual results may differ from these estimates under different assumptions or conditions.

The following are certain critical accounting policies that, among others, affect our more significant judgments and estimates used in the preparation of our condensed consolidated financial statements:

•Revenue Recognition;

•Energy Assets;

•Leases;

•Goodwill and Intangible Assets;

•Derivative Financial Instruments; and

•Variable Interest Entities.

Further details regarding our critical accounting policies and estimates can be found in Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations of our Annual Report. In addition, please refer to Note 2, Summary of Significant Accounting Policies, of our Notes to the audited consolidated financial statements for the year ended December 31, 2019, and notes thereto, included in the Company’s Annual Report. The Company has determined that no material changes concerning our critical accounting policies have occurred since December 31, 2019.

Recent Accounting Pronouncements

See Note 2, Summary of Significant Accounting Policies, of Notes to Condensed Consolidated Financial Statements for a discussion of recent accounting pronouncements.

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Results of Operations

The following tables set forth certain financial data from the condensed consolidated statements of income expressed as a percentage of revenues for the periods presented (in thousands):

	Three Months Ended September 30,
	2020				2019
	Amount		% of Revenues		Amount		% of Revenues
Revenues	$	282,507	100.0	%	$	212,026	100.0	%
Cost of revenues	231,133		81.8	%	167,333		78.9	%
Gross profit	51,374		18.2	%	44,693		21.1	%
Selling, general and administrative expenses	26,859		9.5	%	31,231		14.7	%
Operating income	24,515		8.7	%	13,462		6.3	%
Other expenses, net	3,726		1.3	%	4,192		2.0	%
Income before provision from income taxes	20,789		7.4	%	9,270		4.4	%
Income tax provision	3,100		1.1	%	939		0.4	%
Net income	17,689		6.3	%	8,331		3.9	%
Net loss (income) attributable to redeemable non-controlling interest	2,313		0.8	%	539		0.3	%
Net income attributable to common shareholders	$	20,002	7.1	%	$	8,870	4.2	%
	Nine Months Ended September 30,
	2020				2019
	Amount		% of Revenues		Amount		% of Revenues
Revenues	$	717,956	100.0	%	$	560,321	100.0	%
Cost of revenues	588,628		82.0	%	439,857		78.5	%
Gross profit	129,328		18.0	%	120,464		21.5	%
Selling, general and administrative expenses	82,403		11.5	%	87,396		15.6	%
Operating income	46,925		6.5	%	33,068		5.9	%
Other expenses, net	13,167		1.8	%	11,359		2.0	%
Income before provision from income taxes	33,758		4.7	%	21,709		3.9	%
Income tax provision	597		0.1	%	2,000		0.4	%
Net income	33,161		4.6	%	19,709		3.5	%
Net loss (income) attributable to redeemable non-controlling interest	(2,593)		(0.4)	%	2,524		0.5	%
Net income attributable to common shareholders	$	30,568	4.3	%	$	22,233	4.0	%

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Year-Over-Year Period Comparison

Revenues

The following tables set forth a comparison of our revenues for the periods presented (in thousands):

	Three Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	282,507	$	212,026	$	70,481	33.2	%
	Nine Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	717,956	$	560,321	$	157,635	28.1	%

Revenues increased for the three months ended September 30, 2020 compared to the same period of 2019 primarily due to a $69.5 million increase in our project revenue, a $4.5 million increase in our energy assets revenue, and a $0.1 million increase in our O&M revenue, partially offset by a $1.9 million decrease in our integrated-PV revenue and a $1.8 million decrease in other revenue.

Revenues increased $157.6 million, or 28.1% to $718.0 million for the nine months ended September 30, 2020 compared to the same period of 2019 primarily due to a $153.3 million increase in our project revenue, a $10.5 million increase in our energy asset revenue, and a $4.5 million increase in our O&M revenue, partially offset by a $6.3 million decrease in our integrated-PV revenue and a $4.3 million decrease in other revenue.

Cost of Revenues and Gross Profit

The following tables set forth a comparison of our cost of revenues and gross profit for the periods presented (in thousands):

	Three Months Ended September 30,
	2020			2019			$ Change		% Change
Cost of revenues	$	231,133		$	167,333		$	63,800	38.1	%
Gross margin	18.2		%	21.1		%
	Nine Months Ended September 30,
	2020			2019			$ Change		% Change
Cost of revenues	$	588,628		$	439,857		$	148,771	33.8	%
Gross margin	18.0		%	21.5		%

Cost of revenues increased $63.8 million, or 38.1%, to $231.1 million and gross margin percentage decreased to 18.2%, from 21.1% for the three months ended September 30, 2020 compared to the same period of 2019. Cost of revenues increased $148.8 million, or 33.8%, to $588.6 million and gross margin percentage decreased to 18.0%, from 21.5%, for the nine months ended September 30, 2020 compared to the same period of 2019. The increase in cost of revenues for the three and nine months ended September 30, 2020 is primarily due to the increases in project revenues. The decrease in gross margin for both periods is primarily due to a higher proportion of lower margin projects as part of the revenue mix which includes increased levels of design-build work and lower margin energy and incentive revenue compared to the prior year.

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Selling, General and Administrative Expenses

The following tables set forth a comparison of our selling, general and administrative expenses for the periods presented (in thousands):

	Three Months Ended September 30,
	2020		2019		$ Change		% Change
Selling, general and administrative expenses	$	26,859	$	31,231	$	(4,372)	(14.0)	%
	Nine Months Ended September 30,
	2020		2019		$ Change		% Change
Selling, general and administrative expenses	$	82,403	$	87,396	$	(4,993)	(5.7)	%

Selling, general and administrative expenses decreased $4.4 million, or 14.0%, to $26.9 million for the three months ended September 30, 2020, compared to the same period of 2019 due to a decrease in salaries and benefits of $2.1 million primarily resulting from higher utilization, lower professional fees of $ 1.0 million and a decrease in travel expenses of $0.7 million. For the nine months ended September 30, 2020, selling, general and administrative expenses decreased $5.0 million, or 5.7%, to $82.4 million compared to the same period of 2019, primarily due to a decrease in salaries and benefits of $5.3 million resulting from increased utilization, a decrease in travel expense of $1.5 million and a decrease in professional fees of $1.2 million partially offset by a gain of $2.2 million on the deconsolidation of a variable interest entity recognized during the first quarter of 2019.

Amortization expense of intangible assets related to customer relationships, non-compete agreements, technology and trade names is included in selling, general and administrative expenses in the condensed consolidated statements of income. For the three months ended September 30, 2020 and 2019, we recorded amortization expense related to these intangible assets of $0.2 million. For the nine months ended September 30, 2020 and 2019, we recorded amortization expense related to these intangible assets of $0.5 million.

Other Expenses, Net

Other expenses, net, includes gains and losses from derivatives and foreign currency transactions, interest income and expenses, amortization of deferred financing costs, and certain government incentives. Other expenses, net decreased $0.5 million to $3.7 million for the three months ended September 30, 2020 compared to the same period of 2019, primarily due to government incentives of $0.7 million received at the commercial operation date of certain solar assets which were recorded as other income. Other expenses, net increased $1.8 million to $13.2 million for the nine months ended September 30, 2020 compared to the same period of 2019, primarily due to higher interest expenses of $3.0 million partially offset by government incentives of $1.5 million received which were recorded as other income.

Income Before Taxes

Income before taxes increased $11.5 million, or 124.3%, to $20.8 million for the three months ended September 30, 2020 compared to the same period of 2019, due to the reasons described above. Income before taxes increased $12.1 million, or 55.5%, to $33.8 million for the nine months ended September 30, 2020 compared to the same period of 2019, due to the reasons described above.

Provision (Benefit) from Income Taxes

The provision for income taxes was $3.1 million for the three months ended September 30, 2020, compared to $0.9 million for the three months ended September 30, 2019. The estimated effective annualized tax rate impacted by period discrete items applied for the three months ended September 30, 2020 was 14.9% compared to 10.1% for the three months ended September 30, 2019.

The provision for income taxes was $0.6 million for the nine months ended September 30, 2020, compared to $2.0 million for the nine months ended September 30, 2019. The estimated effective annualized tax rate impacted by period discrete items applied for the nine months ended September 30, 2020 was 1.8% compared to 9.2% for the nine months ended September 30, 2019.

The principal reasons for the difference between the statutory rate and the estimated annual effective rate for 2020 were the effects of investment tax credits to which the Company is entitled from solar plants which have been placed into service or are forecasted to be placed into service during 2020, tax deductions related to Section 179D deductions, tax rate benefits associated with net operating loss carrybacks made possible by the passing of the CARES Act on March 27, 2020 and tax basis adjustments on certain partnership flip transactions. The principal reason for the difference between the statutory rate and the estimated annual

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effective rate for 2019 was the effects of investment tax credits to which the Company is entitled from solar plants which were placed into service or were forecasted to be placed into service during 2019. We estimate the discrete benefit associated with the net operating loss provisions of the CARES Act to be approximately $2.0 million, an estimated refund of taxes paid in prior years of approximately $1.7 million and the carryback provides an additional refund of approximately $3.6 million related to Alternative Minimum Tax.

The investment tax credits and production tax credits to which the Company may be entitled fluctuate from year to year based on the cost of the renewable energy plants the Company places or expects to place in service and production levels at Company owned facilities in the respective year. As part of the Tax Extender and Disaster Relief Act of 2019, signed into law December 20, 2019 Section 179D was extended through December 31, 2020.

Net Income and Earnings Per Share

Net income attributable to common shareholders increased $11.1 million, or 125.5%, to $20.0 million for the three months ended September 30, 2020 compared to $8.9 million for the same period of 2019. Net income attributable to common shareholders increased $8.3 million, or 37.5%, to $30.6 million for the nine months ended September 30, 2020 compared to $22.2 million for the same period of 2019.

Basic earnings per share for the three months ended September 30, 2020 was $0.42, an increase of $0.23 per share compared to the same period of 2019. Diluted earnings per share for the three months ended September 30, 2020 was $0.41, an increase of $0.22 per share, compare to the same period of 2019. Basic earnings per share for the nine months ended September 30, 2020 was $0.64 an increase of $0.16 per share compared to the same period of 2019. Diluted earnings per share for the nine months ended September 30, 2020 was $0.62, an increase of $0.15 per share, compared to the same period of 2019.

Business Segment Analysis

We report results under ASC 280, Segment Reporting. Our reportable segments for the three and nine months ended September 30, 2020 are U.S. Regions, U.S. Federal, Canada and Non-Solar Distributed Generation (“DG”). 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, which include the construction of small-scale plants that we own or develop for customers that produce electricity, gas, heat or cooling from renewable sources of energy; and O&M services. For our energy efficiency projects, we typically enter into energy savings performance contracts (“ESPCs”), under which we agree to develop, design, engineer and construct a project and also commit that the project will satisfy agreed upon performance standards that vary from project to project. When we are not providing a commitment to the customer for long-term performance standards, we may refer to the project as “Design-Build.” 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 offers enterprise energy management services, consulting services and integrated-PV. These segments do not include results of other activities, such as corporate operating expenses not specifically allocated to the segments.

U.S. Regions

	Three Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	92,944	$	84,079	$	8,865	10.5	%
Income before taxes	$	7,225	$	3,350	$	3,875	115.7	%
	Nine Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	266,373	$	227,896	$	38,477	16.9	%
Income before taxes	$	15,960	$	5,530	$	10,430	188.6	%

Revenues for our U.S. Regions segment increased $8.9 million, or 10.5%, to $92.9 million for the three months ended September 30, 2020 compared to the same period of 2019. Revenues for our U.S. Regions segment increased $38.5 million, or 16.9%, to $266.4 million for the nine months ended September 30, 2020 compared to the same period of 2019 primarily due to an increase in project revenues attributable to timing of revenue recognized as a result of the phase of active projects versus the prior year and an increase in revenue from the growth of our energy assets in operation.

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Income before taxes for our U.S. Regions segment increased $3.9 million, or 115.7%, to $7.2 million for the three months ended September 30, 2020 compared to a $3.4 million for the same period of 2019 primarily due to a decrease in operating expenses attributed to lower salary and benefit costs of $2.2 million resulting from lower headcount and higher utilization, partially offset by lower profit margin attributed to a higher mix of lower margin project revenues. Income before taxes for our U.S. Regions segment increased $10.4 million, or 188.6%, to $16.0 million for the nine months ended September 30, 2020 compared to $5.5 million for the same period of 2019 primarily due to the increase in revenues described above and a decrease in operating expenses attributed to lower salary and benefit costs of $5.2 million resulting from lower headcount and higher utilization.

U.S. Federal

	Three Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	118,303	$	71,258	$	47,045	66.0	%
Income before taxes	$	16,121	$	10,967	$	5,154	47.0	%
	Nine Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	271,539	$	169,337	$	102,202	60.4	%
Income before taxes	$	33,162	$	26,631	$	6,531	24.5	%

Revenues for our U.S. Federal segment increased $47.0 million, or 66.0%, to $118.3 million for the three months ended September 30, 2020 compared to the same period of 2019. Revenues for our U.S. Federal segment increased $102.2 million, or 60.4%, to $271.5 million for the nine months ended September 30, 2020 compared to the same period of 2019. The increase in revenues for the three and nine months ended September 30, 2020 were primarily due to an increase in project revenue attributable to the timing of revenue recognized as a result of the phase of active projects compared to the prior year.

Income before taxes for our U.S. Federal segment increased $5.2 million, or 47.0%, to $16.1 million for three months ended September 30, 2020 compared to $11.0 million for the same period of 2019, which relates to the increase in revenues described above and a decrease in project development costs of $0.5 million. Income before taxes for our U.S. Federal segment increased $6.5 million, or 24.5%, to $33.2 million for nine months ended September 30, 2020 compared to $26.6 million for the same period of 2019 due to the increase in revenues described above, a decrease in salaries and benefits of $0.8 million resulting from increased utilization and a decrease project development costs of $0.7 million, partially offset by an increase in interest expense of $0.8 million.

Canada

	Three Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	12,263	$	12,665	$	(402)	(3.2)	%
Income before taxes	$	446	$	1,577	$	(1,131)	(71.7)	%
	Nine Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	32,690	$	27,696	$	4,994	18.0	%
Income before taxes	$	741	$	1,529	$	(788)	(51.5)	%

Revenues for our Canada segment decreased to $12.3 million for the three months ended September 30, 2020 compared to $12.7 million the same period of 2019. Revenues for our Canada segment increased to $32.7 million for the nine months ended September 30, 2020 compared to $27.7 million the same period of 2019. The decrease for the three months ended September 30, 2020 was primarily due to a decrease in our other revenue. The increase in revenues for the nine months ended September 30, 2020 was primarily due to an increase in project revenues related to the progression of certain active projects and an increase in revenue from the growth of our energy assets in operation.

Income before taxes for our Canada segment decreased $1.1 million for the three months ended September 30, 2020 to $0.4 million compared to a $1.6 million for the same period of 2019. The decrease is due primarily to the decrease in revenue

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described above and an increase in interest expense of $0.8 million, partially offset by a decrease in salaries and benefits of $0.1 million. Income before taxes for our Canada segment decreased by $0.8 million for the nine months ended September 30, 2020 to $0.7 million compared to $1.5 million for the same period of 2019. The decrease is primarily due to lower profit margin attributed to a higher mix of lower margin project revenues and an increase in interest expense of $0.8 million.

Non-Solar DG

	Three Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	28,251	$	21,875	$	6,376	29.1	%
Income before taxes	$	2,391	$	977	$	1,414	144.7	%
	Nine Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	74,104	$	66,370	$	7,734	11.7	%
Income before taxes	$	6,964	$	5,758	$	1,206	20.9	%

Revenues for our Non-Solar DG segment increased $6.4 million, or 29.1%, to $28.3 million for the three months ended September 30, 2020 compared to the same period of 2019 primarily due to an increase in project revenues related to the progression of certain active projects. Revenues for our Non-Solar DG segment increased $7.7 million, or 11.7%, to $74.1 million for the nine months ended September 30, 2020 compared to the same period of 2019, primarily due to an increase in project revenues related to the progression of certain active projects.

Income before taxes for our Non-Solar DG segment increased $1.4 million, or 144.7%, to $2.4 million for the three months ended September 30, 2020 compared to the same period of 2019 primarily due to the increase in revenues described above partially offset by an impairment charge of $1.0 million recorded during the quarter related to one of our landfill gas to energy assets. Income before taxes for our Non-Solar DG segment increased $1.2 million, or 20.9%, to $7.0 million for the nine months ended September 30, 2020 compared to the same period of 2019 primarily due to the increase in revenues described above.

All Other & Unallocated Corporate Activity

	Three Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	30,746	$	22,149	$	8,597	38.8	%
Income before taxes	$	3,967	$	881	$	3,086	350.3	%
Unallocated corporate activity	$	(9,361)	$	(8,482)	$	(879)	(10.4)	%
	Nine Months Ended September 30,
	2020		2019		$ Change		% Change
Revenues	$	73,250	$	69,022	$	4,228	6.1	%
Income before taxes	$	7,035	$	7,592	$	(557)	(7.3)	%
Unallocated corporate activity	$	(30,104)	$	(25,331)	$	(4,773)	(18.8)	%

Revenues for our All Other segment increased $8.6 million, or 38.8%, to $30.7 million for the three months ended September 30, 2020 compared to the same period of 2019. Revenues for our All Other segment increased $4.2 million, or 6.1%, to $73.3 million for the nine months ended September 30, 2020 compared to the same period of 2019. The increase in revenues for the three and nine months ended September 30, 2020 were primarily due to an increase in project revenues related to the progression of certain active projects partially offset by a decrease in our integrated-PV revenues, which is a result of weakened sales to our oil and gas customers.

Income before taxes for our All Other segment increased $3.1 million, or 350.3%, to $4.0 million for the three months ended September 30, 2020 compared to the same period of 2019 primarily due to lower operating expenses attributed to lower salary and benefit costs of $0.5 million, lower project development costs of $0.5 million and the recovery of a previously reserved customer receivable of $1.2 million. Income before taxes for our All Other segment decreased $0.6 million, or 7.3%, to $7.0 million for the nine months ended September 30, 2020 compared to the same period of 2019 due to the increase in revenues described above

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offset by a mix of revenue from projects with lower gross margins and a gain of $2.2 million recognized on the deconsolidation of a variable interest entity during the first quarter of 2019.

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.

Liquidity and Capital Resources

Sources of Liquidity

Since inception, we have funded operations primarily through cash flow from operations, advances from Federal ESPC projects and various forms of debt. We believe that the cash and cash equivalents and availability under our revolving senior secured credit facility, combined with our access to credit markets, will be sufficient to fund our operations through the next twelve months and thereafter. See Note 2 of the audited consolidated financial statements for the year ended December 31, 2019, and notes thereto, included in the Company’s Annual Report.

We believe we have sufficient liquidity to satisfy our cash needs, however, we continue to evaluate and take action, as necessary, to preserve adequate liquidity and ensure that our business can continue to operate during these uncertain times. This includes limiting discretionary spending across the organization and re-prioritizing our capital projects amid the COVID-19 pandemic.

On March 27, 2020, the U.S. government enacted the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) which includes modifications to the limitation on business interest expense and net operating loss provisions, and provides a payment delay of employer payroll taxes during 2020 after the date of enactment. We estimate the payment of approximately $5 million of employer payroll taxes otherwise due in 2020 will be delayed with 50% due by December 31, 2021 and the remaining 50% by December 31, 2022. The CARES Act permits net operating losses from the 2018, 2019, and 2020 tax years to be carried back to the previous five tax years (beginning with the earliest year first). We estimate the discrete benefit associated with the net operating loss provisions of the CARES Act to be approximately $2,000, an estimated refund of taxes paid in prior years of approximately $1,700 and the carryback provides an additional refund of approximately $3,600 related to Alternative Minimum Tax credits.

Proceeds from our Federal ESPC projects are generally received through agreements to sell the ESPC receivables related to certain ESPC contracts to third-party investors. We use the advances from the investors under these agreements to finance the projects. Until recourse to us ceases for the ESPC receivables transferred to the investor, upon final acceptance of the work by the government customer, we are the primary obligor for financing received. The transfers of receivables under these agreements do not qualify for sales accounting until final customer acceptance of the work, so the advances from the investors are not classified as operating cash flows. Cash draws that we receive under these ESPC agreements are recorded as financing cash inflows. The use of the cash received under these arrangements to pay project costs is classified as operating cash flows. Due to the manner in which the ESPC contracts with the third-party investors are structured, our reported operating cash flows are materially impacted by the fact that operating cash flows only reflect the ESPC contract expenditure outflows and do not reflect any inflows from the corresponding contract revenues. Upon acceptance of the project by the federal customer the ESPC receivable and corresponding ESPC liability are removed from our condensed consolidated balance sheet as a non-cash settlement.

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.

The amount of interest capitalized relating to construction financing during the period of construction for the nine months ended September 30, 2020 and 2019 was $2.9 million and $2.2 million, respectively.

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Cash Flows

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

	Nine Months Ended September 30,
	2020		2019		$ Change
Cash flows from operating activities	$	(83,789)	$	(120,725)	$	36,936
Cash flows from investing activities	(127,602)		(79,930)		$	(47,672)
Cash flows from financing activities	205,499		172,877		$	32,622
Effect of exchange rate changes on cash	(465)		249		$	(714)
Total net cash flows	$	(6,357)	$	(27,529)	$	21,172

Cash Flows from Operating Activities

Operating activities used $83.8 million of net cash during the nine months ended September 30, 2020 primarily due to an increase of $160.2 million in Federal ESPC receivables, which as described above, the Federal ESPC operating cash flows only reflect the ESPC expenditure outflows and do not reflect any inflows from the corresponding contract revenues, which are recorded as cash inflows from financing activities due to the timing of the receipt of cash related to the assignment of the ESPC receivables to the third-party investors. This was partially offset by net income of $33.2 million, and non-cash compensation, depreciation, amortization, accretion, contingent consideration, deferred income taxes, net loss on derivatives, unrealized foreign exchange loss and other non-cash items totaling $41.9 million which provided cash for operations. Increases in accounts receivable including retainage, project development costs, and decreases in accounts payable, accrued expenses and other current liabilities and income taxes payable used $39.6 million in cash. These were offset by decreases in inventory, costs and estimated earnings in excess of billings, prepaid expenses and other current assets and other assets, and increases in billings in excess of cost and estimated earnings and other liabilities which provided for $40.9 million in cash.

Operating activities used $120.7 million of net cash during the nine months ended September 30, 2019 primarily due to an increase in Federal ESPC receivables of $110.4 million. This was partially offset by net income of $19.7 million and non-cash compensation, depreciation, amortization, accretion, contingent consideration, deferred income taxes, gain on deconsolidation of a VIE, net gain on derivatives, unrealized foreign exchange loss and other non-cash items totaling $29.1 million which provided cash for operations. Increases in accounts receivable including retainage, inventory, costs and estimated earnings in excess of billings, prepaid expenses and other current assets, project development costs and other assets, and decreases in accounts payable, accrued expenses and other current liabilities, billings in excess of costs and estimated earnings and other liabilities used $61.7 million in cash. These were partially offset by an increase in income tax payable which provided for $2.6 million in cash.

Cash Flows from Investing Activities

Cash flows from investing activities during the nine months ended September 30, 2020 used $127.6 million as we invested $125.5 million in purchases of energy assets and $2.0 million in purchases of other property and equipment. We currently plan to invest approximately $50.0 million to $70.0 million in additional capital expenditures for the remainder of 2020, principally for the construction or acquisition of new renewable energy plants.

Cash flows from investing activities during the nine months ended September 30, 2019 used $79.9 million as we invested $72.1 million on purchases of energy assets and $6.2 million in purchases of other property and equipment and $1.3 million related to acquisitions of businesses.

Cash Flows from Financing Activities

Cash flows from financing activities during the nine months ended September 30, 2020 provided $205.5 million, which was primarily due to proceeds received from Federal ESPC projects and energy assets of $196.0 million and net proceeds from long-term debt financings of $40.6 million. These were primarily offset by payments on long-term debt of $42.6 million.

Cash flows from financing activities during the nine months ended September 30, 2019 provided $172.9 million, which was primarily due to proceeds received from Federal ESPC projects and energy assets of $117.2 million, net proceeds from our senior secured credit facility of $41.3 million, net contributions from redeemable non-controlling interests of $20.2 million and proceeds from long-term debt of $7.6 million. These were partially offset by payments on long-term debt of $18.0 million.

We currently plan additional project financings of approximately $50.0 million to $70.0 million for the remainder of 2020 to fund the construction or the acquisition of new renewable energy plants as discussed above.

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We may also, from time to time, finance our operations through issuance or offering of equity or debt securities.

On March 31, 2020, the Company executed an amendment to its fourth amended and restated bank credit facility. The amendment increased the total funded debt to EBITDA covenant ratio from a maximum of 3.25 to 3.75 for the fiscal quarters ending March 31, 2020 through December 31, 2020. The amendment also increased the Eurocurrency Rate floor to 1% from 0% previously. The total commitment under the amended credit facility (revolving credit, term loan and swing line) remains unchanged, which is $185,000, and the amendment did not result in any restructured payments.

See Note 16, Debt, of Notes to Condensed Consolidated Financial Statements for additional discussion of items impacting the Company’s liquidity.

Off-Balance Sheet Arrangements

We did not have during the periods presented, and we do not currently have, any off-balance sheet arrangements, as defined under SEC rules, such as relationships with unconsolidated entities or financial partnerships, which are often referred to as structured finance or special purpose entities, established for the purpose of facilitating financing transactions that are not required to be reflected on our balance sheet.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

As of September 30, 2020, 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 Annual Report.

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 level of assurance.

Changes in Internal Control over Financial Reporting

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.

46

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.

On October 2, 2020, the staff of the United States Securities and Exchange Commission, or SEC, requested information with respect to revenue recognition for our software-as-a-service, or SaaS, businesses during the period January 1, 2014 through September 30, 2020. We are fully cooperating with the SEC; and the Audit Committee of our Board of Directors is overseeing a review by our outside counsel of our software-as-a-service revenue recognition, including review procedures with respect to the revenue recognized during the period from 2018 to the present. The review to date has not identified material misstatements of our financial results. We intend to continue to cooperate fully with the SEC and promptly to address any material accounting errors or material control weaknesses diagnosed in connection with the inquiry and review.

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 of our Annual Report on Form 10-K for the year ended December 31, 2019, or Annual Report and Item 1A of our Quarterly Report on Form 10-Q for the quarter ended March 31, 2020, or First Quarter Quarterly Report. We caution you that the following important factor, among others, could cause our actual results to differ materially from those expressed in forward-looking statements made by us or on our behalf in filings with the SEC, press releases, communications with investors and oral statements. Any or all of our forward-looking statements in this Quarterly Report on Form 10-Q and in any other public statements we make may turn out to be wrong. They can be affected by inaccurate assumptions we might make or by known or unknown risks and uncertainties. Many factors mentioned in the discussion below, in our Annual Report and in our First Quarter Quarterly Report will be important in determining future results. Consequently, no forward-looking statement can be guaranteed. Actual future results may differ materially from those anticipated in forward-looking statements. We undertake no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except to the extent required by applicable law. You should, however, consult any further disclosure we make in our reports filed with the SEC.

The Securities and Exchange Commission’s investigation into our revenue recognition and compensation practices in our software-as-a-service, or SaaS, businesses could result in a restatement of our financial statements, investment in remediation of our internal controls, sanctions or penalties, distraction of our management, and litigation from third parties, each of which could adversely affect or cause variability in our financial results.

On October 2, 2020, the staff of the United States Securities and Exchange Commission, or SEC, requested information with respect to revenue recognition for our software-as-a-service, or SaaS, businesses during the period January 1, 2014 through September 30, 2020. We are fully cooperating with the SEC; and the Audit Committee of our Board of Directors is overseeing a review by our outside counsel of our software-as-a-service revenue recognition, including review procedures with respect to the revenue recognized during the period from 2018 to the present. Although, our review to date has not identified material misstatements of our financial results, the SEC’s inquiry is not complete, and there can be no assurance that SEC will not reach a contrary conclusion. In that event, we may be required to restate previously filed financial statements and invest in remediation of our internal controls; the SEC or another regulator make further inquiries or pursue further action that could result in significant costs, expenses, sanctions and penalties; we may be subject to litigation from shareholders; and our management may be distracted by these circumstances.

Item 2. Unregistered Sales of Equity and Use of Proceeds

Stock Repurchase Program

The following table provides information as of and for the quarter ended September 30, 2020 regarding shares of our Class A common stock that were repurchased under our stock repurchase program authorized by the Board of Directors on April 27, 2016, as increased from time to time (the “Repurchase Program”):

47

Period	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs
July 1, 2020 - July 31, 2020	—	—		—	$	5,897,229
August 1, 2020 - August 31, 2020	—	—		—	$	5,897,229
September 1, 2020 - September 30, 2020	—	—		—	$	5,897,229
Total	—	$	—	—	$	5,897,229

Under the Repurchase Program, we are authorized to repurchase up to $17.6 million of our Class A common stock. Stock repurchases may be made from time to time through the open market and privately negotiated transactions. The amount and timing of any share repurchases will depend upon a variety of factors, including the trading price of our Class A common stock, liquidity, securities laws restrictions, other regulatory restrictions, potential alternative uses of capital, and market and economic conditions.  The Repurchase Program may be suspended or terminated at any time without prior notice, and has no expiration date.

Item 5. Other Information

Stock Ownership Guidelines

On October 28, 2020, the Board of Directors of Ameresco, Inc., approved changes to its Share Ownership Guidelines, to make certain clarifying changes and to allow for the Chief Executive Officer to provide waivers of the guidelines, other than to himself. The Stock Ownership Guidelines were originally adopted by the Board of Directors on April 24, 2019, in order to encourage the company’s executive officers and senior management to obtain a significant ownership interest in the company, thereby helping to align their interests with those of Ameresco’s shareholders. The foregoing summary of the amendments to the stock ownership guidelines is qualified in its entirety by reference to the full text of the guidelines, a copy of which is attached as Exhibit 10.1 to this Quarterly Report on Form 10-Q and incorporated herein by reference.

48

Item 6. Exhibits

The exhibits listed in the Exhibit Index immediately preceding the exhibits are filed (other than exhibit 32.1) as part of this Quarterly Report on Form 10-Q and such Exhibit Index is incorporated herein by reference.

Exhibit Index

Exhibit Number	Description
10.1+*	Ameresco, Inc. Stock Ownership Guidelines, as amended October 28, 2020.
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 September 30, 2020, formatted in 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.
	*Filed herewith.
	**Furnished herewith.
	+ Identifies a management contract or compensatory plan or arrangement in which an executive officer or director of Ameresco participates.

49

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) 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:	November 3, 2020	By:	/s/ Spencer Doran Hole
			Spencer Doran Hole
			Senior Vice President and Chief Financial Officer (duly authorized and principal financial officer)

50

EX-10.1

Exhibit 10.1

Ameresco Inc.

Stock Ownership Guidelines

The Board of Directors of Ameresco Inc. has adopted these stock ownership guidelines in order to encourage the company’s executive officers and certain other senior management members to obtain a significant ownership interest in the company, thereby helping align their interests with those of the company’s stockholders.

Stock Ownership Levels

Chief Executive Officer: 5x Base Salary

Executive Vice President: 3x Base Salary

Senior Vice President: 2x Base Salary

Vice President: 1x Salary

Qualifying Shares

The following shares/interests will be included in calculating stock ownership level:	The following shares/interests will not be included in calculating stock ownership level:
•Outstanding shares of common stock •Unexercised, vested in-the-money stock options to be calculated on the day before of the anniversary date of the plan year •Any other vested grants or account balances under share-based company compensation plan •Employee stock purchase plan share	•Unvested stock option

The shares/interests listed in the first column above will be included if: (1) owned or held directly, jointly with or separately by the executive, his or her spouse, his or her children, or a trust for the benefit of any of the foregoing; or (2) the executive otherwise has a direct or indirect pecuniary interest in such shares/interests (as determined pursuant to Rule 16a-1(a)(2) of the Exchange Act).

Measurement and Valuation

•Progress towards satisfaction of the applicable stock ownership level will be assessed annually on January 1st each year (each, a “Measurement Date”).

•Shares of the company’s common stock will be valued based on the closing price on the trading day immediately preceding the Measurement Date.

•Vested stock options, including vested performance-based stock options, will be valued based on the Retention Percentage (as defined in Implementation Rule 2) of the estimated net value of such shares.

•Net value means after payment of any exercise or purchase price.

Implementation Rules

1.Newly hired and newly promoted executives are expected to accumulate the applicable stock ownership level within five years from the date of hire, promotion or initial election, as applicable. Executives serving on the date of initial adoption of these guidelines are expected to accumulate the applicable stock ownership level by April 24, 2024. During his or her phase-in period, each executive can specify which of his or her holdings will be included in the calculation made on each Measurement Date.

2. Until the first Measurement Date as of which an executive has accumulated shares/interests that satisfy the applicable stock ownership level, he or she is expected to retain at least 80% of the net shares actually received upon the exercise or vesting of any equity award granted by the company as compensation (other than any awards that are granted in lieu of cash compensation otherwise earned). An executive may commit to a higher Retention Percentage with respect to any particular equity grant. The retention percentage with respect to any particular equity grant is referred to as the “Retention Percentage” for such award.

3. Following the first Measurement Date as of which an executive has accumulated shares/interests that satisfy the applicable stock ownership level (such shares/interests, the “Qualifying Shares”), he or she:

(a) may not sell any of the Qualifying Shares if doing so would result in his or her stock ownership level at the time of sale falling below the applicable stock ownership level (provided that with respect to any stock options and performance based stock options that were included in the calculation of the Qualifying Shares, the executive is permitted to sell any of the underlying shares that are in excess of the Retention Percentage with respect to such equity award); and

(b) is not required to purchase more shares to offset any subsequent decline in the value of the Qualifying Shares or to reflect any adjustment in base salary (other than an adjustment made in connection with a promotion that results in the executive becoming subject to a new stock ownership level and a new phase-in period).

4. The Chief Executive officer may grant exceptions to these guidelines based on an executive’s specific individual circumstances as it deems appropriate, provided that only the Board or the Compensation Committee may grant exceptions to these guidelines with respect to the Chief Executive Officer.

5. The Board reserves the right to amend or terminate these guidelines as it deems appropriate. The Board delegates to the Compensation Committee the authority to administer and interpret these guidelines.

Adopted by the Boardof Directors:April 24, 2019

Amended by the Board of Directors: October 28, 2020

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: November 3, 2020	/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: November 3, 2020	/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: November 3, 2020		/s/ George P. Sakellaris
		George P. Sakellaris
		President and Chief Executive Officer (principal executive officer)
Date: November 3, 2020		/s/ Spencer Doran Hole
		Spencer Doran Hole
		Senior Vice President and Chief Financial Officer (duly authorized and principal financial officer)

XML

Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Nov. 02, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
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	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	2020
Document Fiscal Period Focus	Q3
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)		29,866,075
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		Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	[1]	$ 45,351	$ 33,223
Restricted cash	[1]	15,598	20,006
Accounts receivable, net of allowance of $980 and $2,260 respectively	[1]	121,672	95,863
Accounts receivable retainage, net		24,359	16,976
Costs and estimated earnings in excess of billings	[1]	179,909	202,243
Inventory, net		9,081	9,236
Prepaid expenses and other current assets	[1]	34,775	29,424
Income tax receivable		10,263	5,033
Project development costs		15,571	13,188
Total current assets	[1]	456,579	425,192
Federal ESPC receivable		330,607	230,616
Property and equipment, net	[1]	9,545	10,104
Energy assets, net	[1]	670,139	579,461
Goodwill, net		58,172	58,414
Intangible assets, net		1,072	1,614
Operating lease assets	[1]	36,336	32,791
Other assets	[1]	22,247	35,821
Total assets	[1]	1,584,697	1,374,013
Current liabilities:
Current portions of long-term debt and financing lease liabilities	[1]	61,521	69,969
Accounts payable	[1]	205,536	202,416
Accrued expenses and other current liabilities	[1]	30,059	31,356
Current portions of operating lease liabilities	[1]	6,010	5,802
Billings in excess of cost and estimated earnings		35,320	26,618
Income taxes payable		221	486
Total current liabilities	[1]	338,667	336,647
Long-term debt and financing lease liabilities, net of current portion and deferred financing fees	[1]	278,127	266,181
Federal ESPC liabilities		385,386	245,037
Deferred income taxes, net		3,994	115
Deferred grant income		7,007	6,885
Long-term operating lease liabilities, net of current portion	[1]	32,509	29,101
Other liabilities	[1]	39,529	29,575
Commitments and contingencies (Note 9)
Redeemable non-controlling interests, net		36,421	31,616
Stockholders’ equity:
Preferred stock, $0.0001 par value, 5,000,000 shares authorized, no shares issued and outstanding at September 30, 2020 and December 31, 2019		0	0
Additional paid-in capital		141,599	133,688
Retained earnings		344,936	314,459
Accumulated other comprehensive loss, net		(11,695)	(7,514)
Treasury stock, at cost, 2,101,795 shares at September 30, 2020 and 2,101,340 shares at December 31, 2019		(11,788)	(11,782)
Total stockholders’ equity		463,057	428,856
Total liabilities, redeemable non-controlling interests and stockholders’ equity		1,584,697	1,374,013
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 September 30, 2020 and December 31, 2019 of $166,678 and $158,912, respectively. Includes non-recourse liabilities of consolidated VIEs at September 30, 2020 and December 31, 2019 of $35,334 and $38,568, respectively. See Note 12.

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Accounts receivable, allowance for credit loss, current		$ 980	$ 2,260
Total assets	[1]	$ 1,584,697	$ 1,374,013
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
Variable Interest Entity, Primary Beneficiary
Total assets		$ 166,678	$ 158,912
Total liabilities		$ 35,334	$ 38,568
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)		31,967,870	31,331,345
Common stock, shares outstanding (in shares)		29,866,075	29,230,005
Treasury stock, shares (in shares)		2,101,795	2,101,340
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

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at September 30, 2020 and December 31, 2019 of $166,678 and $158,912, respectively. Includes non-recourse liabilities of consolidated VIEs at September 30, 2020 and December 31, 2019 of $35,334 and $38,568, respectively. See Note 12.

XML

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenues	$ 282,507	$ 212,026	$ 717,956	$ 560,321
Cost of revenues	231,133	167,333	588,628	439,857
Gross profit	51,374	44,693	129,328	120,464
Selling, general and administrative expenses	26,859	31,231	82,403	87,396
Operating income	24,515	13,462	46,925	33,068
Other expenses, net	3,726	4,192	13,167	11,359
Income before income taxes	20,789	9,270	33,758	21,709
Income tax provision	3,100	939	597	2,000
Net income	17,689	8,331	33,161	19,709
Net loss (income) attributable to redeemable non-controlling interests	2,313	539	(2,593)	2,524
Net income attributable to common shareholders	$ 20,002	$ 8,870	$ 30,568	$ 22,233
Net income per share attributable to common shareholders:
Basic (in usd per share)	$ 0.42	$ 0.19	$ 0.64	$ 0.48
Diluted (in usd per share)	$ 0.41	$ 0.19	$ 0.62	$ 0.47
Weighted average common shares outstanding:
Basic (in shares)	47,788	46,555	47,597	46,413
Diluted (in shares)	49,101	47,693	48,785	47,675

XML

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 17,689	$ 8,331	$ 33,161	$ 19,709
Other comprehensive income (loss):
Unrealized gain (loss) from interest rate hedges, net of tax effect	638	(1,135)	(3,412)	(3,949)
Foreign currency translation adjustments	861	(356)	(769)	289
Total other comprehensive income (loss)	1,499	(1,491)	(4,181)	(3,660)
Comprehensive income	19,188	6,840	28,980	16,049
Comprehensive (income) loss attributable to redeemable non-controlling interests	2,313	539	(2,593)	2,524
Comprehensive income attributable to common shareholders	$ 21,501	$ 7,379	$ 26,387	$ 18,573

XML

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) from interest rate hedges, tax effect	$ 199	$ (410)	$ (1,209)	$ (1,308)

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Condensed Consolidated Statements of Changes in Redeemable Non-Controlling Interests and Stockholders' Equity - USD ($) $ in Thousands	Total	Adjustment	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	Retained Earnings Adjustment	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Adjustment	Treasury Stock
Redeemable non-controlling interests, beginning balance at Dec. 31, 2018	$ 14,719
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from redeemable non-controlling interests	20,482
Distributions to redeemable non-controlling interests	(569)
Net (loss) income	(2,524)
Redeemable non-controlling interests, ending balance at Sep. 30, 2019	32,108
Beginning balance (in shares) at Dec. 31, 2018					28,275,506	18,000,000						2,091,040
Beginning balance at Dec. 31, 2018	376,875	$ 0			$ 3	$ 2	$ 124,651	$ 269,806	$ 217	$ (5,949)	$ (217)	$ (11,638)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)					745,484
Exercise of stock options	4,960						4,960
Stock-based compensation expense	1,195						1,195
Employee stock purchase plan (in shares)					22,124
Employee stock purchase plan	305						305
Open market purchase of common shares (in shares)					(10,000)							10,000
Open market purchase of common shares	(139)											$ (139)
Unrealized gain from interest rate hedges, net	(3,949)
Unrealized loss from interest rate hedges, net	(3,732)									(3,732)
Foreign currency translation adjustment	289									289
Net (loss) income	22,233							22,233
Ending balance (in shares) at Sep. 30, 2019					29,033,114	18,000,000						2,101,040
Ending balance at Sep. 30, 2019	401,986				$ 3	$ 2	131,111	292,256		(9,609)		$ (11,777)
Redeemable non-controlling interests, beginning balance at Jun. 30, 2019	32,037
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from redeemable non-controlling interests	974
Distributions to redeemable non-controlling interests	(364)
Net (loss) income	(539)
Redeemable non-controlling interests, ending balance at Sep. 30, 2019	32,108
Beginning balance (in shares) at Jun. 30, 2019					28,412,894	18,000,000						2,091,040
Beginning balance at Jun. 30, 2019	390,328				$ 3	$ 2	126,693	283,386		(8,118)		$ (11,638)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)					630,220
Exercise of stock options	4,005						4,005
Stock-based compensation expense	413						413
Open market purchase of common shares (in shares)					(10,000)							10,000
Open market purchase of common shares	(139)											$ (139)
Unrealized gain from interest rate hedges, net	(1,135)									(1,135)
Foreign currency translation adjustment	(356)									(356)
Net (loss) income	8,870							8,870
Ending balance (in shares) at Sep. 30, 2019					29,033,114	18,000,000						2,101,040
Ending balance at Sep. 30, 2019	401,986				$ 3	$ 2	131,111	292,256		(9,609)		$ (11,777)
Redeemable non-controlling interests, beginning balance at Dec. 31, 2019	31,616
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from redeemable non-controlling interests	3,353
Distributions to redeemable non-controlling interests	(1,232)
Accretion of tax equity financing fees	91
Net (loss) income	2,593
Redeemable non-controlling interests, ending balance at Sep. 30, 2020	36,421
Beginning balance (in shares) at Dec. 31, 2019			29,230,005	18,000,000	29,230,005	18,000,000						2,101,340
Beginning balance at Dec. 31, 2019	428,856				$ 3	$ 2	133,688	314,459		(7,514)		$ (11,782)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)					608,063
Exercise of stock options	6,088						6,088
Stock-based compensation expense	1,380						1,380
Employee stock purchase plan (in shares)					28,462
Employee stock purchase plan	443						443
Open market purchase of common shares (in shares)					(455)							455
Open market purchase of common shares	(6)											$ (6)
Unrealized gain from interest rate hedges, net	(3,412)
Unrealized loss from interest rate hedges, net										(3,412)
Foreign currency translation adjustment	(769)									(769)
Accretion of tax equity financing fees	(91)							(91)
Net (loss) income	30,568							30,568
Ending balance (in shares) at Sep. 30, 2020			29,866,075	18,000,000	29,866,075	18,000,000						2,101,795
Ending balance at Sep. 30, 2020	463,057				$ 3	$ 2	141,599	344,936		(11,695)		$ (11,788)
Redeemable non-controlling interests, beginning balance at Jun. 30, 2020	36,303
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from redeemable non-controlling interests	2,865
Distributions to redeemable non-controlling interests	(525)
Accretion of tax equity financing fees	91
Net (loss) income	(2,313)
Redeemable non-controlling interests, ending balance at Sep. 30, 2020	36,421
Beginning balance (in shares) at Jun. 30, 2020					29,718,102	18,000,000						2,101,795
Beginning balance at Jun. 30, 2020	439,673				$ 3	$ 2	139,625	325,025		(13,194)		$ (11,788)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)					147,813
Exercise of stock options	1,450						1,450
Stock-based compensation expense	522						522
Employee stock purchase plan (in shares)					160
Employee stock purchase plan	2						2
Unrealized gain from interest rate hedges, net	638									638
Foreign currency translation adjustment	861									861
Accretion of tax equity financing fees	(91)							(91)
Net (loss) income	20,002							20,002
Ending balance (in shares) at Sep. 30, 2020			29,866,075	18,000,000	29,866,075	18,000,000						2,101,795
Ending balance at Sep. 30, 2020	$ 463,057				$ 3	$ 2	$ 141,599	$ 344,936		$ (11,695)		$ (11,788)

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 33,161	$ 19,709
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation of energy assets	28,496	26,338
Depreciation of property and equipment	2,492	2,115
Amortization of debt discount and deferred financing fees	1,849	1,734
Amortization of intangible assets	528	681
Accretion of ARO and contingent consideration	64	98
Recoveries of bad debts	(1,089)	(134)
Loss on disposal / impairment of long-lived assets	2,146	0
Gain on deconsolidation of VIE	0	(2,160)
Net loss (gain) from derivatives	971	(1,072)
Stock-based compensation expense	1,380	1,195
Deferred income taxes	5,146	152
Unrealized foreign exchange (gain) loss	(43)	149
Changes in operating assets and liabilities:
Accounts receivable	(21,178)	(4,468)
Accounts receivable retainage	(7,422)	(3,079)
Federal ESPC receivable	(160,231)	(110,374)
Inventory, net	155	(2,137)
Costs and estimated earnings in excess of billings	24,824	(23,130)
Prepaid expenses and other current assets	3,916	(11,084)
Project development costs	(2,557)	(5,641)
Other assets	1,050	(698)
Accounts payable, accrued expenses and other current liabilities	(2,942)	(8,931)
Billings in excess of cost and estimated earnings	9,019	(952)
Other liabilities	1,972	(1,602)
Income taxes payable, net	(5,496)	2,566
Cash flows from operating activities	(83,789)	(120,725)
Cash flows from investing activities:
Purchases of property and equipment	(1,968)	(6,188)
Purchases of energy assets, net of grant proceeds	(125,504)	(72,140)
Acquisitions, net of cash received	0	(1,279)
Contributions to equity investment	(130)	(323)
Cash flows from investing activities	(127,602)	(79,930)
Cash flows from financing activities:
Payments of financing fees	(3,955)	(541)
Proceeds from exercises of options and ESPP	6,531	5,265
Repurchase of common stock	(6)	(139)
Proceeds from senior secured credit facility, net	6,000	41,343
Proceeds from long-term debt financings	40,604	7,614
Proceeds from Federal ESPC projects	194,586	115,556
Proceeds for energy assets from Federal ESPC	1,435	1,639
Proceeds from investments by redeemable non-controlling interests, net	2,854	20,173
Payments on long-term debt	(42,550)	(18,033)
Cash flows from financing activities	205,499	172,877
Effect of exchange rate changes on cash	(465)	249
Net decrease in cash, cash equivalents, and restricted cash	(6,357)	(27,529)
Cash, cash equivalents, and restricted cash, beginning of period	77,264	97,913
Cash, cash equivalents, and restricted cash, end of period	70,907	70,384
Supplemental disclosures of cash flow information:
Cash paid for interest	14,764	12,410
Cash paid for income taxes	1,057	2,983
Non-cash Federal ESPC settlement	56,454	214,444
Accrued purchases of energy assets	38,747	17,224
Conversion of revolver to term loan	0	25,000
Reconciliation of cash, cash equivalents and restricted cash
Total cash and cash equivalents, and restricted cash	$ 70,907	$ 70,384

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Condensed Consolidated Statements of Changes in Redeemable Non-Controlling Interests and Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Redeemable non-controlling interest ,net of tax equity financing fees	$ 635	$ 635

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Basis of Presentation

9 Months Ended

Sep. 30, 2020

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”) are unaudited, pursuant to certain rules and regulations of the Securities and Exchange Commission, and include, in the opinion of the Company, 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 and nine months ended September 30, 2020 are not necessarily indicative of results which may be expected for the full year. The December 31, 2019 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 notes thereto, should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2019, and notes thereto, included in the Company’s annual report on Form 10-K for the year ended December 31, 2019 filed with the Securities and Exchange Commission on March 4, 2020.

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

Significant Risks and Uncertainties

In March 2020, the World Health Organization categorized Coronavirus Disease 2019 (“COVID-19”) as a pandemic, and the President of the United States declared the COVID-19 outbreak a national emergency.

The Company’s condensed consolidated financial statements reflect estimates and assumptions made by management that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and reported amounts of revenue and expenses during the reporting periods presented. The Company considered the impact of COVID-19 on the assumptions and estimates used and determined that there was no material adverse impact on the Company’s results of operations for the three or nine months ended September 30, 2020.

The severity of the impact of the COVID-19 pandemic on the Company's business will depend on a number of factors, including, but not limited to, the duration and severity of the pandemic and the extent and severity of the impact on the Company's customers, all of which are uncertain and cannot be predicted. The Company's future results of operations and liquidity could be adversely impacted by delays in payments of outstanding receivable amounts beyond normal payment terms, delays in obtaining signed customer contracts for awarded projects, supply chain disruptions and uncertain demand. As of the date of issuance of these condensed consolidated financial statements, the extent to which the COVID-19 pandemic may impact the Company's financial condition, liquidity, or results of operations is uncertain.

On March 27, 2020, the U.S. government enacted the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) which includes modifications to the limitation on business interest expense and net operating loss provisions, and provides a payment delay of employer payroll taxes during 2020 after the date of enactment. The Company estimates the payment of approximately $5,000 of employer payroll taxes otherwise due in 2020 will be delayed with 50% due by December 31, 2021 and the remaining 50% by December 31, 2022. The CARES Act permits net operating losses from the 2018, 2019, and 2020 tax years to be carried back to the previous five tax years (beginning with the earliest year first). The Company estimates the discrete benefit associated with the net operating loss provisions of the CARES Act to be approximately $2,000, an estimated refund of taxes paid in prior years of approximately $1,700, and the carryback also provides an additional refund of approximately $3,600 related to Alternative Minimum Tax credits.

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The accounting policies of the Company are set forth in Note 2 to the consolidated financial statements contained in the Company’s 2019 annual report on Form 10-K. The Company includes herein certain updates to those policies.

Accounts Receivable and allowance for Credit Losses

Accounts receivable are stated at the amount management expects to collect from outstanding balances. Effective January 1, 2020, the Company adopted ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13) prospectively. This ASU replaces the incurred loss impairment model with an expected credit loss impairment model for financial instruments, including trade receivables. The amendment requires entities to consider

forward-looking information to estimate expected credit losses, resulting in earlier recognition of losses for receivables that are current or not yet due, which were not considered under the previous accounting guidance. The Company performed an assessment of its allowance for credit losses and determined that no adjustment was required to retained earnings upon adoption.

The Company’s methodology to estimate the allowance for credit losses includes quarterly assessments of historical bad debt write-off experience, current economic and market conditions, management’s evaluation of outstanding accounts receivable, anticipated recoveries and the Company’s forecasts. Due to the short-term nature of its receivables, the estimate of credit losses is primarily based on aged accounts receivable balances and the financial condition of customers. In addition, specific allowance amounts are established to record the appropriate provision for customers that have a higher probability of default. Bad debts are written off against the allowance when identified. As part of its assessment, the Company also considered the current and expected future economic and market conditions due to the COVID-19 pandemic and determined that the estimate of credit losses was not significantly impacted as of September 30, 2020.

Changes in the allowance for credit losses are as follows:

	September 30, 2020		September 30, 2019
Allowance for credit loss, beginning of period	$	2,260	$	2,765
Recoveries of costs and expenses, net	(1,089)		(134)
Account write-offs and other	(191)		(45)
Allowance for credit loss, end of period	$	980	$	2,586

Recent Accounting Pronouncements

Fair Value Measurement

In August 2018, the FASB issued ASU 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement, which modifies the disclosure requirements on fair value measurements. ASU 2018-13 was effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company adopted this guidance as of January 1, 2020 and the adoption did not have a material impact on the Company’s condensed consolidated financial statements.

Consolidations

In October 2018, the FASB issued ASU 2018-17, Consolidation (Topic 810), Targeted Improvements to Related Party Guidance for Variable Interest Entities, which aligns the evaluation of whether a decision maker's fee is a variable interest with the guidance in the primary beneficiary test by requiring the decision maker to consider an indirect interest in a VIE held by related party under common control on a proportionate basis. The new standard was effective for interim and annual periods beginning after December 15, 2019, with early adoption permitted. The Company adopted this guidance as of January 1, 2020 and the adoption did not have an impact on the Company’s condensed consolidated financial statements.

Credit Losses

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13), and a subsequent amendment to the initial guidance, ASU 2018-19 Codification Improvements to Topic 326, Financial Instruments—Credit Losses (collectively, Topic 326). Topic 326 requires measurement and recognition of expected credit losses for financial assets held, which include, but are not limited to, trade and other receivables. The new standard was effective for fiscal years beginning after December 15, 2019. The Company adopted this guidance as of January 1, 2020 and the adoption did not have a material impact on the Company’s condensed consolidated financial statements.

In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives, and Hedging, and Topic 825, Financial Instruments. The improvements to Topic 815, among other things, clarifies some areas around partial-term fair value hedges, interest rate risk, the amortization of fair value hedge basis adjustments and their disclosure, and some clarification of matters related to the transitioning to ASU 2017-12, which was adopted by the Company during the year ended December 31, 2018. The improvements to Topic 326 clarify certain aspects surrounding accounting for credit losses in connection with the Company’s receivables. These include that the Company should consider anticipated recoveries in its calculation of credit losses. For those that have already adopted ASU No. 2017-12, the new standard

was effective the first annual period beginning after the issuance date of ASU No. 2019-04, or as of January 1, 2020 for the Company, with early adoption permitted. The Company adopted this guidance as of January 1, 2020 and the adoption did not have a material impact on the Company’s condensed consolidated financial statements.

Income Taxes

In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes, which eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. ASU 2019-12 is effective for the Company for the fiscal year beginning after December 15, 2020. The Company is currently evaluating the impacts of the provisions of ASU 2019-12 on its condensed consolidated financial statements and disclosures.

Others

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 2020-0, 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. The Company is currently evaluating the impact that adopting this new accounting standard will have on its condensed consolidated financial statements and related disclosures.

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Revenue from Contracts with Customers

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

REVENUE FROM CONTRACTS WITH CUSTOMERS

Disaggregation of Revenue

The following tables provide information about disaggregated revenue by line of business, reportable segments, and geographical region for the three and nine months ended September 30, 2020 and 2019.

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Line of Business
Three Months Ended September 30, 2020
Project revenue	$	79,201	$	105,444	$	9,311	$	7,506	$	13,941	$	215,403
O&M revenue	4,492		11,384		—		2,009		36		17,921
Energy assets	9,060		1,325		1,227		18,535		161		30,308
Other	191		150		1,725		201		16,608		18,875
Total revenues	$	92,944	$	118,303	$	12,263	$	28,251	$	30,746	$	282,507
Three Months Ended September 30, 2019
Project revenue	$	72,667	$	58,199	$	9,380	$	3,059	$	2,592	$	145,897
O&M revenue	4,280		11,123		—		2,330		88		17,821
Energy assets	6,699		1,339		1,327		16,421		—		25,786
Other	433		597		1,958		65		19,469		22,522
Total revenues	$	84,079	$	71,258	$	12,665	$	21,875	$	22,149	$	212,026
Nine Months Ended September 30, 2020
Project revenue	$	226,734	$	233,778	$	24,342	$	12,881	$	22,027	$	519,762
O&M revenue	13,127		33,765		26		6,144		229		53,291
Energy assets	25,556		3,549		3,234		54,341		599		87,279
Other	956		447		5,088		738		50,395		57,624
Total revenues	$	266,373	$	271,539	$	32,690	$	74,104	$	73,250	$	717,956
Nine Months Ended September 30, 2019
Project revenue	$	196,284	$	134,954	$	20,112	$	6,318	$	8,818	$	366,486
O&M revenue	11,580		30,370		5		6,771		109		48,835
Energy assets	18,063		2,958		2,585		52,612		582		76,800
Other	1,969		1,055		4,994		669		59,513		68,200
Total revenues	$	227,896	$	169,337	$	27,696	$	66,370	$	69,022	$	560,321

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Geographical Regions
Three Months Ended September 30, 2020
United States	$	92,944	$	118,303	$	655	$	28,251	$	16,173	$	256,326
Canada	—		—		11,608		—		22		11,630
Other	—		—		—		—		14,551		14,551
Total revenues	$	92,944	$	118,303	$	12,263	$	28,251	$	30,746	$	282,507
Three Months Ended September 30, 2019
United States	$	84,079	$	71,258	$	1,023	$	21,875	$	17,936	$	196,171
Canada	—		—		11,642		—		50		11,692
Other	—		—		—		—		4,163		4,163
Total revenues	$	84,079	$	71,258	$	12,665	$	21,875	$	22,149	$	212,026
Nine Months Ended September 30, 2020
United States	$	266,373	$	271,539	$	2,173	$	74,104	$	49,294	$	663,483
Canada	—		—		30,517		—		124		30,641
Other	—		—		—		—		23,832		23,832
Total revenues	$	266,373	$	271,539	$	32,690	$	74,104	$	73,250	$	717,956
Nine Months Ended September 30, 2019
United States	$	227,896	$	169,337	$	2,281	$	66,370	$	56,052	$	521,936
Canada	—		—		25,415		—		157		25,572
Other	—		—		—		—		12,813		12,813
Total revenues	$	227,896	$	169,337	$	27,696	$	66,370	$	69,022	$	560,321

For the three months ended September 30, 2020 and 2019, approximately 95% and 93%, respectively, of revenue is recognized over time, and the remainder is for products and services transferred at a point in time. For the nine months ended September 30, 2020 and 2019, approximately 94% and 91%, respectively, of revenue is recognized over time, and the remainder is for products and services transferred at a point in time.

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers:

	September 30, 2020		December 31, 2019
Accounts receivable, net	$	121,672	$	95,863
Accounts receivable retainage, net	$	24,359	$	16,976
Contract Assets:
Costs and estimated earnings in excess of billings	$	179,909	$	202,243
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	40,302	$	32,178

	September 30, 2019		December 31, 2018
Accounts receivable, net	$	91,755	$	85,985
Accounts receivable retainage, net	$	16,652	$	13,516
Contract Assets:
Costs and estimated earnings in excess of billings	$	124,652	$	86,842
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	28,768	$	30,706

Accounts receivable retainage represents amounts due from customers, but where payments are withheld contractually until certain construction milestones are met. Amounts retained typically range from 5% to 10% of the total invoice. The Company classifies as a current asset those retainages that are expected to be billed in the next twelve months. Unbilled revenue, presented as costs and estimated earnings in excess of billings, represent amounts earned and billable that were not invoiced at the end of the fiscal period.

Contract assets represent the Company’s rights to consideration in exchange for services transferred to a customer that have not been billed as of the reporting date. The Company’s rights to consideration are generally unconditional at the time its performance obligations are satisfied.

At the inception of a contract, the Company expects the period between when it satisfies its performance obligations, and when the customer pays for the services, will be one year or less. As such, the Company has elected to apply the practical expedient which allows the Company to not adjust the promised amount of consideration for the effects of a significant financing component, when a financing component is present.

When the Company receives consideration, or such consideration is unconditionally due from a customer prior to transferring goods or services to the customer under the terms of a sales contract, the Company records deferred revenue, which represents a contract liability. Such deferred revenue typically results from billings in excess of costs incurred and advanced payments received on project contracts. As of September 30, 2020 and December 31, 2019, the Company classified $4,982 and $5,560, respectively, as a non-current liability, included in other liabilities on the condensed consolidated balance sheets, for those performance obligations expected to be completed beyond the next twelve months.

The decrease in contract assets for the nine months ended September 30, 2020 was primarily due to billings of $464,712, offset in part by revenue recognized of approximately $434,709. The increase in contract liabilities was primarily driven by the receipt of advance payment from customers, and related billings, exceeding reductions from recognition of revenue as performance obligations were satisfied. For the nine months ended September 30, 2020, the Company recognized revenue of $85,356 that was previously included in the beginning balance of contract liabilities and billed customers $86,203. Changes in contract liabilities are also driven by reclassifications to or from contract assets as a result of timing of customer payments.

The increase in contract assets for the nine months ended September 30, 2019 was primarily due to revenue recognized of $317,088, offset in part by billings of approximately $282,568. 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 nine months ended September 30, 2019, the Company recognized revenue of $92,685 that was previously included in the beginning balance of contract liabilities, and billed customers $92,427. Changes in contract liabilities are also driven by reclassifications to or from contract assets as a result of timing of customer payments.

Contracts are often modified for a change in scope or other requirements. The Company considers contract modifications to exist when the modification either creates new or changes the existing enforceable rights and obligations. Most of the Company’s contract modifications are for goods or services that are not distinct from the existing performance obligations.  The effect of a contract modification on the transaction price, and the measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue (either as an increase or decrease) on a cumulative catchup basis.

Performance Obligations

A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. Performance obligations are satisfied at a point in time or over time and are supported by contracts with customers. For most of the Company’s contracts, there are multiple promises of goods or services. Typically, the Company provides a significant service of integrating a complex set of tasks and components such as design, engineering, construction management, and equipment procurement for a project

contract. The bundle of goods and services are provided to deliver one output for which the customer has contracted. In these cases, the Company considers the bundle of goods and services to be a single performance obligation. The Company may also promise to provide distinct goods or services within a contract, such as a project contract for installation of energy conservation measures and post-installation O&M services. In these cases the Company separates the contract into more than one performance obligation. If a contract is separated into more than one performance obligation, the Company allocates the total transaction price to each performance obligation in an amount based on the estimated relative standalone selling prices of the promised goods or services underlying each performance obligation.

Backlog

The Company’s remaining performance obligations (hereafter referred to as “backlog”) represent the unrecognized revenue value of the Company’s contract commitments. The Company’s backlog may vary significantly each reporting period based on the timing of major new contract commitments and the backlog may fluctuate with currency movements. In addition, our customers have the right, under some circumstances, to terminate contracts or defer the timing of the Company’s services and their payments to the Company. At September 30, 2020, the Company had backlog of $2,154,526 of which approximately 31% is anticipated to be recognized as revenue in the next twelve months and the remaining, thereafter.

The Company applied the practical expedient for certain revenue streams to exclude the value of remaining performance obligations for (i) contracts with an original expected term of one year or less, or (ii) contracts for which the Company recognizes revenue in proportion to the amount it has the right to invoice for services performed.

Contract Acquisition Costs

The Company accounts for certain acquisition costs over the life of the contract, consisting primarily of commissions when paid. Commission costs are incurred commencing at contract signing. Commission costs are allocated across all performance obligations and deferred and amortized over the contract term on a progress toward completion basis.

As of September 30, 2020 and December 31, 2019, $1,735 of capitalized commission costs related to contracts that were not completed were included in other assets in the accompanying condensed consolidated balance sheets. For contracts that have a duration of less than one year, the Company follows a practical expedient and expenses these costs when incurred. During the three and nine months ended September 30, 2020 and 2019, the amortization of commission costs related to contracts was not material and was included in the accompanying condensed consolidated statements of income.

The Company capitalizes costs incurred related to the development of projects prior to contract signing as it is partial fulfillment of its performance obligations. Capitalized project development costs include only those costs incurred in connection with the development of energy projects, primarily direct labor, interest costs, outside contractor services, consulting fees, legal fees and travel, if incurred after a point in time where the realization of related revenue becomes probable. Project development costs incurred prior to the probable realization of revenue are expensed as incurred. The Company classifies as a current asset those project development costs that are expected to proceed to construction activity in the twelve months that follow. The Company periodically reviews these balances and writes off any amounts where the realization of the related revenue is no longer probable. Project development costs of $1,228 and $1,080 were included in other long-term assets in the accompanying condensed consolidated balance sheets as of September 30, 2020 and December 31, 2019, respectively. During the three months ended September 30, 2020 and 2019, $3,611 and $2,048, respectively, of project development costs were recognized in the condensed consolidated statements of income on projects that converted to customer contracts. During the nine months ended September 30, 2020 and 2019, $9,546 and $13,081, respectively, of project development costs were recognized in the condensed consolidated statements of income on projects that converted to customer contracts.

No impairment charges in connection with the Company’s commission costs or project development costs were recorded during the nine months ended September 30, 2020 and 2019.

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Business Acquisitions and Related Transactions

9 Months Ended

Sep. 30, 2020

Business Combinations [Abstract]

Business Acquisitions and Related Transactions

BUSINESS ACQUISITIONS AND RELATED TRANSACTIONSThe Company accounts for acquisitions using the acquisition method in accordance with ASC 805, Business Combinations. The purchase price for each is allocated to the net assets based on their estimated fair values at the date of each acquisition. The excess purchase price over the estimated fair value of net assets acquired, which are calculated using level 3 inputs per the fair value hierarchy as defined in Note 10, are recorded as goodwill. Intangible assets, if identified, are recorded and are amortized over periods ranging from one to fifteen years. See Note 5 for additional information.

During the three and nine months ended September 30, 2020, the Company did not complete any acquisitions.

The results of acquired assets since the dates of the acquisitions have been included in the Company’s operations as presented in the accompanying condensed consolidated statements of income, condensed consolidated statements of comprehensive income and condensed consolidated statements of cash flows.

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Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

GOODWILL AND INTANGIBLE ASSETS

The changes in the carrying value of goodwill attributable to each reporting unit are as follows:

	U.S. Regions		U.S. Federal		Canada		Non-solar DG		Other		Total
Carrying Value of Goodwill
Balance, December 31, 2019	$	26,705	$	3,981	$	3,369	$	—	$	24,359	$	58,414
Currency effects	—		—		(88)		—		(154)		(242)
Balance, September 30, 2020	$	26,705	$	3,981	$	3,281	$	—	$	24,205	$	58,172
Accumulated Goodwill Impairment
Balance, December 31, 2019	$	—	$	—	$	(1,016)	$	—	$	—	$	(1,016)
Balance, September 30, 2020	$	—	$	—	$	(1,016)	$	—	$	—	$	(1,016)

The Company performs its annual goodwill impairment testing in the fourth quarter of each year, or more frequently if an event occurs or circumstances change that would more-likely-than-not reduce the fair value of a reporting unit below its carrying amount. During the Company’s annual goodwill impairment testing in 2019, all reporting units had fair values that exceeded their carrying values by at least 15%. If the Company believes that one or more indicators of impairment have occurred, then the Company will perform an impairment test. The Company has the option to perform a qualitative assessment (commonly referred to as “step zero” test) to determine whether further quantitative analysis for impairment of goodwill and indefinite-lived intangible assets is necessary. The qualitative assessment includes a review of macroeconomic conditions, industry and market considerations, internal cost factors, and the Company’s own overall financial and share price performance, among other factors. If, after assessing the totality of events or circumstances the Company determines that it is not more-likely-than-not that the fair value of a reporting unit is less than its carrying amount, the Company does not need to perform a quantitative analysis. Upon assessment, the Company concluded it was not more likely than not that the fair value of the reporting units were less than the carrying value of the reporting units as of September 30, 2020. The Company will monitor future results and will perform a test if indicators trigger an impairment review. At this time, the Company has not deemed the impact that the current macroeconomic environment surrounding the COVID-19 pandemic has or is expected to have on the business to be a triggering event for impairment purposes.

Separable intangible assets that are not deemed to have indefinite lives are amortized over their useful lives. The Company annually assesses whether a change in the life over which the Company’s assets are amortized is necessary, or more frequently if events or circumstances warrant.

Acquired intangible assets other than goodwill that are subject to amortization include customer contracts, customer relationships, non-compete agreements, technology and trade names. Customer contracts are amortized ratably over the period of the acquired customer contracts ranging in periods from approximately one to five years. All other acquired intangible assets are amortized over periods ranging from approximately four to fifteen years, as determined by the nature of the respective intangible asset. The Company did not complete any acquisitions nor acquire any intangible assets during the nine months ended September 30, 2020.

The gross carrying amount and accumulated amortization of intangible assets are as follows:

	As of September 30, 2020		As of December 31, 2019
Gross Carrying Amount
Customer contracts	$	7,847	$	7,904
Customer relationships	12,634		12,749
Non-compete agreements	3,021		3,037
Technology	2,719		2,732
Trade names	542		544
Total gross carrying amount	26,763		26,966
Accumulated Amortization
Customer contracts	7,847		7,844
Customer relationships	11,585		11,236
Non-compete agreements	3,021		3,037
Technology	2,706		2,704
Trade names	532		531
Total accumulated amortization	25,691		25,352
Intangible assets, net	$	1,072	$	1,614

Amortization expense is as follows:

		Three Months Ended September 30,				Nine Months Ended September 30,
Asset type	Location	2020		2019		2020		2019
Customer contracts	Cost of revenues	$	15	$	22	$	60	$	67
All other intangible assets	Selling, general and administrative expenses	157		202		468		614
Total		$	172	$	224	$	528	$	681

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Energy Assets

9 Months Ended

Sep. 30, 2020

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

Energy Assets

ENERGY ASSETS

Energy assets consist of the following:

	September 30, 2020		December 31, 2019
Energy assets	$	885,148	$	767,331
Less - accumulated depreciation and amortization	(215,009)		(187,870)
Energy assets, net	$	670,139	$	579,461

Included in the above energy assets are financing lease assets and associated accumulated depreciation and amortization, as follows:

	September 30, 2020		December 31, 2019
Financing lease assets	$	42,402	$	42,402
Less - accumulated depreciation and amortization	(7,865)		(6,268)
Financing lease assets, net	$	34,537	$	36,134

Depreciation and amortization expense on the above energy assets, net of deferred grant amortization, included in the condensed consolidated statements of income is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
Location	2020		2019		2020		2019
Cost of revenues	$	9,547	$	8,843	$	28,496	$	26,338

Included in the above depreciation and amortization expense on energy assets is depreciation and amortization on financing lease assets, as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
Location	2020		2019		2020		2019
Cost of revenues	$	533	$	533	$	1,597	$	1,597

The Company evaluates long-lived assets for impairment as events or changes in circumstances indicate the carrying value of these assets may not be fully recoverable. Examples of such triggering events applicable to our assets include a significant decrease in the market price of a long-lived asset or asset group or a current-period operating or cash flow loss combined with a history of operating or cash flow losses or a projection or forecast that demonstrates continuing losses associated with the use of a long-lived asset or asset group. The Company performs its annual long-lived asset impairment testing in the fourth quarter of each year. In addition to the annual impairment test, the Company regularly assesses whether a triggering event has occurred which would require interim impairment testing.

During the three months ended September 30, 2020, the Company performed an engine overhaul on one of its energy assets, however, the engine consistently failed to achieve emissions compliance and the Company considered the engine unsalvageable. As a result of this event, the Company performed an impairment analysis on this energy asset group and recorded an impairment charge of $1,028, which fully impaired this asset group. The impairment charge is included in selling, general and administrative expenses within the condensed consolidated statements of income for the three and nine months ended September 30, 2020.

The Company assessed the impact that the current macroeconomic environment surrounding the COVID-19 pandemic has or is expected to have on the business, and concluded that it was not a triggering event for impairment purposes and there was no indication of impairment of long-lived assets, except as indicated above, for the nine months ended September 30, 2020.

The Company capitalizes interest costs relating to construction financing during the period of construction, which is included in energy assets, net in the Company’s condensed consolidated balance sheets. Capitalized interest is amortized to cost of revenues in the Company’s condensed consolidated statements of income on a straight line basis over the useful life of the associated energy asset.

The Company capitalized interest costs as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Capitalized interest	$	1,096	$	632	$	2,870	$	2,210

As of September 30, 2020 and December 31, 2019, there are three ESPC asset projects which are included within energy assets, net on the Company’s condensed consolidated balance sheets. The Company controls and operates the assets as well as obtains financing during the construction period of the assets. As the Company has an obligation to the customer for performance of the

asset, the Company records a liability associated with these energy assets, although, the customer is responsible for payments to the lender based on the energy asset’s production. As of September 30, 2020 and December 31, 2019, the liabilities recognized in association with these assets were $11,077 and $10,243, respectively, of which $225 and $827, respectively, have been classified as the current portion and are included in accrued expenses and other current liabilities. The remainder is included in other liabilities in the accompanying condensed consolidated balance sheets.

During the three months ended June 30, 2020, the Company acquired one energy project, which did not constitute a business in accordance with ASC 805-50, Business Combinations. The Company acquired the energy project in exchange for a total purchase price of $1,251, which included cash of $1,031 paid by the Company, issuance of a promissory note payable to the sellers of $204, detailed further in Note 16, and $16 of rollover equity in connection with shares of one of the Company’s subsidiaries issued to the sellers. As of September 30, 2020, the Company has remaining deferred purchase price consideration on previously closed projects of $1,446 that will be paid upon final completion of the respective projects and throughout 2020. The Company has a definitive agreement from prior periods, which has recently been amended, to purchase eight additional solar projects from developers for a total purchase price of $10,242, of which the Company has not made any payments to the developers for those projects.

As of September 30, 2020, the Company had $1,484 in asset retirement obligations (“AROs”) assets recorded in project assets, net of accumulated depreciation, and $1,622 in ARO liabilities recorded in accrued expenses and other current liabilities and other liabilities. During the three and nine months ended September 30, 2020, the Company recorded $20 and $58, respectively, of depreciation expense related to the ARO assets. During the three and nine months ended September 30, 2020, the Company recorded $21 and $64, respectively, in accretion expense to the ARO liabilities, which is reflected in the accretion of ARO and contingent consideration on the condensed consolidated statements of cash flows. The Company’s current ARO liabilities relate to the removal of equipment and pipelines at certain renewable gas projects and obligations related to the decommissioning of certain solar facilities and wind turbines.

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Income Taxes

9 Months Ended

Sep. 30, 2020

Income Tax Disclosure [Abstract]

Income Taxes

INCOME TAXES

The Company recorded a provision for income taxes of $3,100 and $939 for the three months ended September 30, 2020 and 2019, respectively. The Company recorded a provision for income taxes of $597 and $2,000 for the nine months ended September 30, 2020 and 2019, respectively. The estimated effective annualized tax rate impacted by the period discrete items is 14.9% for the three months ended September 30, 2020, compared to a 10.1% of estimated effective annualized tax rate for the three months ended September 30, 2019. The estimated effective annualized tax rate impacted by the period discrete items is 1.8% for the nine months ended September 30, 2020, compared to a 9.2% of estimated effective annualized tax rate for the nine months ended September 30, 2019.

The principal reasons for the difference between the statutory rate and the estimated annual effective rate for 2020 were the effects of investment tax credits to which the Company is entitled from solar plants which have been placed into service or are forecasted to be placed into service during 2020, the tax deductions related to the Section 179D deduction, the tax rate benefits associated with net operating loss carryback made possible by the passing of the CARES Act on March 27, 2020 and tax basis adjustments on certain partnership flip transactions. The principal reason for the difference between the statutory rate and the estimated annual effective rate for 2019 were the effects of investment tax credits to which the Company is entitled from solar plants which have been placed into service or were forecasted to be placed into service during 2019.

The investment tax credits and production tax credits to which the Company may be entitled fluctuate from year to year based on the cost of the renewable energy plants the Company places or expects to place in service and production levels at company owned facilities in that year. As part of the Tax Extender and Disaster Relief Act of 2019, signed into law December 20, 2019, Section 179D was extended through December 31, 2020.

A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:

	Gross Unrecognized Tax Benefits
Balance, December 31, 2019	$	400
Balance, September 30, 2020	$	400

At September 30, 2020 and December 31, 2019, the Company had approximately $80 of total gross unrecognized tax benefits (both net of the federal benefit on state amounts) representing the amount of unrecognized tax benefits that, if recognized, would favorably affect the effective income tax rate in any future periods.

The Company has presented all deferred tax assets and liabilities as noncurrent, net liabilities on its condensed consolidated balance sheets as of September 30, 2020, and December 31, 2019.

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Leases

9 Months Ended

Sep. 30, 2020

Leases [Abstract]

Leases

LEASES

The Company enters into a variety of operating lease agreements through the normal course of its business including certain administrative offices. The leases are long-term, non-concealable real estate lease agreements, expiring at various dates through fiscal 2028. The agreements generally provide for fixed minimum rental payments and the payment of utilities, real estate taxes, insurance and repairs. The Company also leases certain land parcels related to our energy projects, expiring at various dates through fiscal 2050. The office and land leases make up a significant portion of the Company’s operating lease activity. Many of these leases have one or more renewal options that allow the Company, at its discretion, to renew the lease for six months to seven years. Only renewal options that the Company believed were likely to be exercised were included in our lease calculations. Many land leases include minimum lease payments that increase when the related project becomes operational. In these cases, the commercial operation date was estimated by the Company and used to calculate the estimated minimum lease payments.

Supplemental balance sheet information related to leases at September 30, 2020 and December 31, 2019 is as follows:

	September 30, 2020			December 31, 2019
Operating Leases:
Operating lease assets	$	36,336		$	32,791
Current operating lease liabilities	6,010			5,802
Long-term portions of operating lease liabilities	32,509			29,101
Total operating lease liabilities	$	38,519		$	34,903
Weighted-average remaining lease term	11 years			11 years
Weighted-average discount rate	6.0		%	6.3		%
Financing Leases:
Energy assets, net	$	34,537		$	36,134
Current portions of financing lease liabilities	4,746			4,997
Long-term financing lease liabilities, less current portions and net of deferred financing fees	21,352			23,500
Total financing lease liabilities	$	26,098		$	28,497
Weighted-average remaining lease term	16 years			17 years
Weighted-average discount rate	11.9		%	11.8		%

The costs related to the Company’s leases are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Operating Lease:
Operating lease costs	$	2,001	$	1,913	$	5,933	$	5,660
Financing Lease:
Amortization expense	533		533		1,597		1,597
Interest on lease liabilities	723		854		2,282		2,750
Total lease costs	$	3,257	$	3,300	$	9,812	$	10,007

The Company’s estimated minimum future lease obligations under our leases are as follows: 

	Operating Leases		Financing Leases
Year ended December 31,
2020	$	2,339	$	4,014
2021	7,342		6,792
2022	6,716		5,178
2023	5,381		3,676
2024	4,500		2,565
Thereafter	28,115		24,080
Total minimum lease payments	$	54,393	$	46,305
Less: interest	15,874		20,207
Present value of lease liabilities	$	38,519	$	26,098

The Company has determined that certain power purchase agreements (“PPAs”) contain a lease component in accordance with ASC 840, Leases. The Company recognized $2,261 and $6,546 of operating lease revenue under these agreements during the three and nine months ended September 30, 2020, respectively, which was reflected in revenues on the condensed consolidated statements of income. The Company recognized $2,243 and $6,737 of operating lease revenue under these agreements during the three and nine months ended September 30, 2019, respectively, which was reflected in revenues on the condensed consolidated statements of income.

Sale-Leaseback

Most of the solar photovoltaic (“solar PV”) projects sold to date under the sale-leaseback program have been determined by the Company to be financing leases. The Company defers any gain or loss, representing the excess or shortfall of cash received from the investor compared to the net book value of the asset in the Company’s condensed consolidated balance sheets at the time of the sale. The Company records the long term portion of any deferred gain or loss in its condensed consolidated balance sheets in other liabilities and other assets, respectively, and the current portion in accrued expenses and other current liabilities and prepaid expenses and other current assets. The deferred amounts are amortized over the lease term and are included in cost of revenues in its condensed consolidated statements of income. Net gains from amortization expense in cost of revenues related to deferred gains and losses was $57 and $57 for the three months ended September 30, 2020 and 2019, respectively. Net gains from amortization expense in cost of revenues related to deferred gains and losses was $170 and $172 for the nine months ended September 30, 2020 and 2019, respectively.

During the third quarter of 2018, the Company entered into an agreement with an investor which gives us the option to sell and contemporaneously lease back solar PV projects through August 2019 up to a maximum funding amount of $100 million. In January 2020, the Company amended the August 2018 agreement with the investor to extend the end date of the agreement to November 24, 2020 and increase the maximum funding amount up to $150 million. During the nine months ended September 30,

2020, the Company completed one acquisition of a solar PV project and $130 million remained available under the lending commitment.

A summary of amounts related to sale leasebacks in the Company’s condensed consolidated balance sheets is as follows:

	September 30, 2020		December 31, 2019
Financing lease assets, net	$	34,537	$	36,134
Deferred loss, short-term, net	115		115
Deferred loss, long-term, net	1,715		1,801
Total deferred loss	$	1,830	$	1,916
Financing lease liabilities, short-term	4,746		4,997
Financing lease liabilities, long-term	21,352		23,500
Total financing lease liabilities	$	26,098	$	28,497
Deferred gain, short-term, net	345		345
Deferred gain, long-term, net	5,206		5,463
Total deferred gain	$	5,551	$	5,808

Leases

LEASES

The Company enters into a variety of operating lease agreements through the normal course of its business including certain administrative offices. The leases are long-term, non-concealable real estate lease agreements, expiring at various dates through fiscal 2028. The agreements generally provide for fixed minimum rental payments and the payment of utilities, real estate taxes, insurance and repairs. The Company also leases certain land parcels related to our energy projects, expiring at various dates through fiscal 2050. The office and land leases make up a significant portion of the Company’s operating lease activity. Many of these leases have one or more renewal options that allow the Company, at its discretion, to renew the lease for six months to seven years. Only renewal options that the Company believed were likely to be exercised were included in our lease calculations. Many land leases include minimum lease payments that increase when the related project becomes operational. In these cases, the commercial operation date was estimated by the Company and used to calculate the estimated minimum lease payments.

Supplemental balance sheet information related to leases at September 30, 2020 and December 31, 2019 is as follows:

	September 30, 2020			December 31, 2019
Operating Leases:
Operating lease assets	$	36,336		$	32,791
Current operating lease liabilities	6,010			5,802
Long-term portions of operating lease liabilities	32,509			29,101
Total operating lease liabilities	$	38,519		$	34,903
Weighted-average remaining lease term	11 years			11 years
Weighted-average discount rate	6.0		%	6.3		%
Financing Leases:
Energy assets, net	$	34,537		$	36,134
Current portions of financing lease liabilities	4,746			4,997
Long-term financing lease liabilities, less current portions and net of deferred financing fees	21,352			23,500
Total financing lease liabilities	$	26,098		$	28,497
Weighted-average remaining lease term	16 years			17 years
Weighted-average discount rate	11.9		%	11.8		%

The costs related to the Company’s leases are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Operating Lease:
Operating lease costs	$	2,001	$	1,913	$	5,933	$	5,660
Financing Lease:
Amortization expense	533		533		1,597		1,597
Interest on lease liabilities	723		854		2,282		2,750
Total lease costs	$	3,257	$	3,300	$	9,812	$	10,007

The Company’s estimated minimum future lease obligations under our leases are as follows: 

	Operating Leases		Financing Leases
Year ended December 31,
2020	$	2,339	$	4,014
2021	7,342		6,792
2022	6,716		5,178
2023	5,381		3,676
2024	4,500		2,565
Thereafter	28,115		24,080
Total minimum lease payments	$	54,393	$	46,305
Less: interest	15,874		20,207
Present value of lease liabilities	$	38,519	$	26,098

The Company has determined that certain power purchase agreements (“PPAs”) contain a lease component in accordance with ASC 840, Leases. The Company recognized $2,261 and $6,546 of operating lease revenue under these agreements during the three and nine months ended September 30, 2020, respectively, which was reflected in revenues on the condensed consolidated statements of income. The Company recognized $2,243 and $6,737 of operating lease revenue under these agreements during the three and nine months ended September 30, 2019, respectively, which was reflected in revenues on the condensed consolidated statements of income.

Sale-Leaseback

Most of the solar photovoltaic (“solar PV”) projects sold to date under the sale-leaseback program have been determined by the Company to be financing leases. The Company defers any gain or loss, representing the excess or shortfall of cash received from the investor compared to the net book value of the asset in the Company’s condensed consolidated balance sheets at the time of the sale. The Company records the long term portion of any deferred gain or loss in its condensed consolidated balance sheets in other liabilities and other assets, respectively, and the current portion in accrued expenses and other current liabilities and prepaid expenses and other current assets. The deferred amounts are amortized over the lease term and are included in cost of revenues in its condensed consolidated statements of income. Net gains from amortization expense in cost of revenues related to deferred gains and losses was $57 and $57 for the three months ended September 30, 2020 and 2019, respectively. Net gains from amortization expense in cost of revenues related to deferred gains and losses was $170 and $172 for the nine months ended September 30, 2020 and 2019, respectively.

During the third quarter of 2018, the Company entered into an agreement with an investor which gives us the option to sell and contemporaneously lease back solar PV projects through August 2019 up to a maximum funding amount of $100 million. In January 2020, the Company amended the August 2018 agreement with the investor to extend the end date of the agreement to November 24, 2020 and increase the maximum funding amount up to $150 million. During the nine months ended September 30,

2020, the Company completed one acquisition of a solar PV project and $130 million remained available under the lending commitment.

A summary of amounts related to sale leasebacks in the Company’s condensed consolidated balance sheets is as follows:

	September 30, 2020		December 31, 2019
Financing lease assets, net	$	34,537	$	36,134
Deferred loss, short-term, net	115		115
Deferred loss, long-term, net	1,715		1,801
Total deferred loss	$	1,830	$	1,916
Financing lease liabilities, short-term	4,746		4,997
Financing lease liabilities, long-term	21,352		23,500
Total financing lease liabilities	$	26,098	$	28,497
Deferred gain, short-term, net	345		345
Deferred gain, long-term, net	5,206		5,463
Total deferred gain	$	5,551	$	5,808

Leases

LEASES

The Company enters into a variety of operating lease agreements through the normal course of its business including certain administrative offices. The leases are long-term, non-concealable real estate lease agreements, expiring at various dates through fiscal 2028. The agreements generally provide for fixed minimum rental payments and the payment of utilities, real estate taxes, insurance and repairs. The Company also leases certain land parcels related to our energy projects, expiring at various dates through fiscal 2050. The office and land leases make up a significant portion of the Company’s operating lease activity. Many of these leases have one or more renewal options that allow the Company, at its discretion, to renew the lease for six months to seven years. Only renewal options that the Company believed were likely to be exercised were included in our lease calculations. Many land leases include minimum lease payments that increase when the related project becomes operational. In these cases, the commercial operation date was estimated by the Company and used to calculate the estimated minimum lease payments.

Supplemental balance sheet information related to leases at September 30, 2020 and December 31, 2019 is as follows:

	September 30, 2020			December 31, 2019
Operating Leases:
Operating lease assets	$	36,336		$	32,791
Current operating lease liabilities	6,010			5,802
Long-term portions of operating lease liabilities	32,509			29,101
Total operating lease liabilities	$	38,519		$	34,903
Weighted-average remaining lease term	11 years			11 years
Weighted-average discount rate	6.0		%	6.3		%
Financing Leases:
Energy assets, net	$	34,537		$	36,134
Current portions of financing lease liabilities	4,746			4,997
Long-term financing lease liabilities, less current portions and net of deferred financing fees	21,352			23,500
Total financing lease liabilities	$	26,098		$	28,497
Weighted-average remaining lease term	16 years			17 years
Weighted-average discount rate	11.9		%	11.8		%

The costs related to the Company’s leases are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Operating Lease:
Operating lease costs	$	2,001	$	1,913	$	5,933	$	5,660
Financing Lease:
Amortization expense	533		533		1,597		1,597
Interest on lease liabilities	723		854		2,282		2,750
Total lease costs	$	3,257	$	3,300	$	9,812	$	10,007

The Company’s estimated minimum future lease obligations under our leases are as follows: 

	Operating Leases		Financing Leases
Year ended December 31,
2020	$	2,339	$	4,014
2021	7,342		6,792
2022	6,716		5,178
2023	5,381		3,676
2024	4,500		2,565
Thereafter	28,115		24,080
Total minimum lease payments	$	54,393	$	46,305
Less: interest	15,874		20,207
Present value of lease liabilities	$	38,519	$	26,098

The Company has determined that certain power purchase agreements (“PPAs”) contain a lease component in accordance with ASC 840, Leases. The Company recognized $2,261 and $6,546 of operating lease revenue under these agreements during the three and nine months ended September 30, 2020, respectively, which was reflected in revenues on the condensed consolidated statements of income. The Company recognized $2,243 and $6,737 of operating lease revenue under these agreements during the three and nine months ended September 30, 2019, respectively, which was reflected in revenues on the condensed consolidated statements of income.

Sale-Leaseback

Most of the solar photovoltaic (“solar PV”) projects sold to date under the sale-leaseback program have been determined by the Company to be financing leases. The Company defers any gain or loss, representing the excess or shortfall of cash received from the investor compared to the net book value of the asset in the Company’s condensed consolidated balance sheets at the time of the sale. The Company records the long term portion of any deferred gain or loss in its condensed consolidated balance sheets in other liabilities and other assets, respectively, and the current portion in accrued expenses and other current liabilities and prepaid expenses and other current assets. The deferred amounts are amortized over the lease term and are included in cost of revenues in its condensed consolidated statements of income. Net gains from amortization expense in cost of revenues related to deferred gains and losses was $57 and $57 for the three months ended September 30, 2020 and 2019, respectively. Net gains from amortization expense in cost of revenues related to deferred gains and losses was $170 and $172 for the nine months ended September 30, 2020 and 2019, respectively.

During the third quarter of 2018, the Company entered into an agreement with an investor which gives us the option to sell and contemporaneously lease back solar PV projects through August 2019 up to a maximum funding amount of $100 million. In January 2020, the Company amended the August 2018 agreement with the investor to extend the end date of the agreement to November 24, 2020 and increase the maximum funding amount up to $150 million. During the nine months ended September 30,

2020, the Company completed one acquisition of a solar PV project and $130 million remained available under the lending commitment.

A summary of amounts related to sale leasebacks in the Company’s condensed consolidated balance sheets is as follows:

	September 30, 2020		December 31, 2019
Financing lease assets, net	$	34,537	$	36,134
Deferred loss, short-term, net	115		115
Deferred loss, long-term, net	1,715		1,801
Total deferred loss	$	1,830	$	1,916
Financing lease liabilities, short-term	4,746		4,997
Financing lease liabilities, long-term	21,352		23,500
Total financing lease liabilities	$	26,098	$	28,497
Deferred gain, short-term, net	345		345
Deferred gain, long-term, net	5,206		5,463
Total deferred gain	$	5,551	$	5,808

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2020

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

The Company from time to time issues letters of credit and performance bonds, with their third-party lenders, to provide collateral.

Legal Proceedings

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

Commitments as a Result of Acquisitions

In August 2018, the Company completed an acquisition which provided for a revenue earn-out contingent upon the acquired business meeting certain cumulative revenue targets over five years from the acquisition date. The Company evaluated financial forecasts of the acquired business and concluded that the fair value of this earn-out was approximately $555, which was subsequently increased to $678 as of December 31, 2019 which remained consistent at September 30, 2020, and is recorded in other liabilities on the condensed consolidated balance sheets. The contingent consideration will be paid annually, beginning in May 2020, if any of the cumulative revenue targets are achieved. No payments have been made to date. The fair value of the earn-out will be re-evaluated at each reporting period and adjustments will be recorded as needed. See Note 10 for additional information.

In November 2018, the Company completed an acquisition of certain lease options, which provided for an earn-out if the lease option is exercised and if certain financial metrics are achieved. The Company evaluated the acquired lease options and concluded that the fair-value of this contingent liability was approximately $363, which was subsequently increased to $378 at December 31, 2019 which remained consistent at September 30, 2020, and is recorded in accrued expenses and other current liabilities and other liabilities on the condensed consolidated balance sheets. Payments will be made when milestones are achieved. The contingent liability will be re-evaluated at each reporting period and adjustments will be recorded as needed.

In April 2020, the Company completed an acquisition which provided for a profit earn-out contingent upon the acquired project meeting certain financial return targets. The Company evaluated the financial forecasts of the acquired asset and concluded that fair value of the earn-out was $0 at completion of the acquisition which will be re-evaluated at each reporting period. The contingent consideration will be paid annually beginning in 2021, if the financial return targets are achieved.

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Fair Value Measurement

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurement

FAIR VALUE MEASUREMENT

The Company recognizes certain financial assets and liabilities at fair value on a recurring basis (at least annually). 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 upon unadjusted quoted prices for identical instruments traded in active markets.

Level 2: Inputs are based upon 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 the Company’s financial instruments measured at fair value on a recurring basis:

		Fair Value as of
	Level	September 30, 2020		December 31, 2019
Assets:
Interest rate swap instruments	2	$	—	$	15
Commodity swap instruments	2	—		198
Total assets		$	—	$	213
Liabilities:
Interest rate swap instruments	2	$	11,128	$	6,236
Commodity swap instruments	2	44		—
Make-whole provisions	2	1,352		918
Contingent consideration	3	678		678
Total liabilities		$	13,202	$	7,832

The fair value of the Company’s interest rate swaps was determined using cash flow analysis on the expected cash flow of the contract in combination with observable market-based inputs, including interest rate curves and implied volatility. As part of this valuation, the Company considered the credit ratings of the counterparties to the interest rate swaps to determine if a credit risk adjustment was required.

The fair value of the Company’s commodity swaps was determined using a cash flow analysis on the expected cash flow of the contract in combination with observable forward price inputs obtained from a third-party pricing source. As part of this valuation, the Company considered the credit ratings of the counterparties to the commodity swaps to determine if a credit risk adjustment was required.

The fair value of the Company’s make-whole provisions was determined by either comparing it against the rates of similar debt instruments under similar terms without a make-whole provision obtained from various highly rated third-party pricing sources or evaluating the present value of the prepayment fee.

The fair value of the Company’s contingent consideration liabilities were determined by evaluating the acquired asset’s future financial forecasts and evaluating which, if any, of the cumulative revenue targets, financial metrics and/or milestones are likely to be met. The Company has classified contingent consideration related to certain acquisitions within level 3 of the fair value hierarchy because the fair value is derived using significant unobservable inputs, which include discount rates and probability-weighted cash flows. The Company determined the fair value of its contingent consideration obligations based on a probability-weighted income approach derived from financial performance estimates and probability assessments of the attainment of certain

targets. The Company establishes discount rates to be utilized in its valuation models based on the cost to borrow that would be required by a market participant for similar instruments.

The key assumptions as of September 30, 2020 related to the contingent consideration from the acquisition of certain assets of Chelsea Group Limited, used in the model include a discount rate of 18% for purposes of discounting the low and base case scenarios associated with achievement of the financial based earn-out. The probabilities assigned to these scenarios were 50% for both the low and base case scenarios. An increase or decrease in the probability of achievement of any scenario could result in a significant increase or decrease to the estimated fair value of the contingent consideration liability.

The following table sets forth a summary of changes in fair value of contingent liability classified as level 3 for the nine months ended September 30, 2020 and September 30, 2019:

	Nine Months Ended September 30, 2020		Nine Months Ended September 30, 2019
Contingent consideration liability balance at December 31, 2019 and 2018	$	678	$	600
Changes in the fair value of contingent consideration obligation	—		50
Contingent consideration liability balance at September 30, 2020 and 2019	$	678	$	650

The fair value of financial instruments is determined by reference to observable market data and other valuation techniques, as appropriate. The only category of financial instruments where the difference between fair value and recorded book value is notable is long-term debt. At September 30, 2020 and December 31, 2019 the fair value of the Company’s long-term debt was estimated using discounted cash flows analysis, based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements which are considered to be level 2 inputs. There have been no transfers in or out of level 2 or level 3 financial instruments for the nine months ended September 30, 2020 and the year ended December 31, 2019.

Based on the analysis performed, the fair value and the carrying value of the Company’s long-term debt, excluding financing leases, are as follows:

	As of September 30, 2020				As of December 31, 2019
	Fair Value		Carrying Value		Fair Value		Carrying Value
Long-term debt (Level 2)	$	318,816	$	313,550	$	309,377	$	307,508

The Company is also required periodically to measure certain other assets at fair value on a nonrecurring basis, including long-lived assets, goodwill and other intangible assets. There were no assets recorded at fair value on a non-recurring basis at September 30, 2020 or December 31, 2019.

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Derivative Instruments and Hedging Activities

9 Months Ended

Sep. 30, 2020

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 the Company’s derivative instruments as follows at September 30, 2020 and December 31, 2019:

		Derivatives as of
		September 30, 2020		December 31, 2019
	Balance Sheet Location	Fair Value		Fair Value
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other assets	$	—	$	15
Interest rate swap contracts	Other liabilities	$	10,816	$	6,210
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other liabilities	$	312	$	26
Commodity swap contracts	Other assets	$	—	$	198
Commodity swap contracts	Other liabilities	$	44	$	—
Make-whole provisions	Other liabilities	$	1,352	$	918

During the three months ended September 30, 2020, as a result of a qualitative assessment of the original volatility inputs used to calculate the hedge effectiveness related to two interest rate swaps that were executed in May 2020, the Company de-designated these interest rate swaps as effective hedging instruments and reclassified $303 out of accumulated other comprehensive income (“AOCI”) into other expenses, net.

As of September 30, 2020, all but four of the Company’s freestanding derivatives were designated as hedging instruments. As of December 31, 2019 all but three of the Company’s freestanding derivatives were designated as hedging instruments.

The following tables present information about the effects of the Company’s derivative instruments on the condensed consolidated statements of income and condensed consolidated statements of comprehensive income:

		Amount of (Gain) Loss Recognized in Net Income
	Location of (Gain) Loss Recognized in Net Income	Three Months Ended September 30,				Nine Months Ended September 30,
		2020		2019		2020		2019
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	503	$	44	$	908	$	(6)
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	287	$	(3)	$	287	$	66
Commodity swap contracts	Other expenses, net	194		(31)		241		(203)
Make-whole provisions	Other expenses, net	(27)		(150)		443		(935)

	Nine Months Ended September 30, 2020
Derivatives Designated as Hedging Instruments:
Accumulated loss in AOCI at the beginning of the period	$	(4,742)
Unrealized loss recognized in AOCI	(4,623)
Loss reclassified from AOCI to other expenses, net	1,211
Net loss on derivatives	(3,412)
Accumulated loss in AOCI at the end of the period	$	(8,154)

The following tables present a listing of the Company’s active derivative instruments as of September 30, 2020:

Active Interest Rate Swap	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
3-Year, 2.46% Fixed	March 2018	December 2020	17,100		Not 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-Year, 5.30% Fixed	February 2006	February 2021	3,256		Designated
15.5-Year, 5.40% Fixed	September 2008	March 2024	13,081		Designated

Active Commodity Swap	Effective Date	Expiration Date	Initial Notional Amount (Volume)	Commodity Measurement	Status
1-Year, $2.70 MMBtu Fixed	May 2020	April 2021	435,810	MMBtus	Not Designated

Other Derivatives	Classification	Effective Date	Expiration Date	Fair Value ($)
Make-whole provisions	Liability	June/August 2018	December 2038	$	534
Make-whole provisions	Liability	August 2016	April 2031	432
Make-whole provisions	Liability	April 2017	February 2034	386

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Investment Funds and Other Variable Interest Entities

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Investment Funds and Other Variable Interest Entities

INVESTMENT FUNDS AND OTHER VARIABLE INTEREST ENTITIES

Investment Funds

In each of September 2015, June 2017, June 2018, October 2018, and December 2019, the Company formed an investment fund with a different third-party investor which granted the applicable investor ownership interests in the net assets of certain of the Company’s renewable energy project subsidiaries. The Company currently has five such investment funds each with a different third-party investor.

The Company consolidates the investment funds, and all inter-company balances and transactions between the Company and the investment funds are eliminated in its condensed consolidated financial statements. The Company determined that the investment funds meet the definition of a variable interest entity (“VIE”). The Company uses a qualitative approach in assessing the consolidation requirements for VIEs that focuses on determining whether the Company has the power to direct the activities of the VIE that most significantly affect the VIE’s economic performance and whether the Company has the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE.

The Company has considered the provisions within the contractual arrangements that grant it power to manage and make decisions that affect the operation of these VIEs, including determining the solar energy systems and associated long-term customer contracts to be sold or contributed to the VIEs, and installation, operation and maintenance of the solar energy systems. The Company considers that the rights granted to the other investors under the contractual arrangements are more protective in

nature rather than participating rights. As such, the Company has determined it is the primary beneficiary of the VIEs for all periods presented. The Company evaluates its relationships with VIEs on an ongoing basis to ensure that it continues to be the primary beneficiary.

Under the related agreements, cash distributions of income and other receipts by the funds, net of agreed-upon expenses and estimated expenses, tax benefits and detriments of income and loss, and tax benefits of tax credits, are assigned to the funds’ investor and Company’s subsidiaries as specified in contractual arrangements. Certain of these arrangements have call and put options to acquire the investor’s equity interest as specified in the contractual agreements. See Note 13 for additional information on the call and put options.

A summary of amounts related to the investment funds in the Company’s condensed consolidated balance sheets is as follows:

	September 30,		December 31,
	2020(1)		2019(1)
Cash and cash equivalents	$	9,179	$	4,666
Restricted cash	1,248		586
Accounts receivable, net	867		532
Costs and estimated earnings in excess of billings	2,168		1,125
Prepaid expenses and other current assets	128		108
Total VIE current assets	13,590		7,017
Property and equipment, net	1,266		1,266
Energy assets, net	145,008		142,456
Operating lease assets	6,483		6,511
Other assets	331		1,662
Total VIE assets	$	166,678	$	158,912
Current portions of long-term debt and financing lease liabilities	$	2,243	$	2,252
Accounts payable	594		2,006
Accrued expenses and other current liabilities	1,553		2,203
Current portions of operating lease liabilities	121		102
Total VIE current liabilities	4,511		6,563
Long-term debt and financing lease liabilities, net of current portion and deferred financing fees	23,626		24,654
Long-term operating lease liabilities, net of current portion	6,302		6,180
Other liabilities	895		1,171
Total VIE liabilities	$	35,334	$	38,568

(1) The amounts in the above table are reflected in Note 1 on the Company’s condensed consolidated balance sheets. See the Company’s condensed consolidated balance sheets for additional information.

Other Variable Interest Entities

The Company follows guidance on the consolidation of VIEs that requires companies to utilize a qualitative approach to determine whether it is the primary beneficiary of a VIE. The process for identifying the primary beneficiary of a VIE requires consideration of the factors that indicate a party has the power to direct the activities that most significantly impact the joint ventures economic performance, including powers granted to the joint ventures program manager, powers contained in the joint venture governing board and, to a certain extent, a company's economic interest in the joint venture. The Company analyzes its joint ventures and classifies them as either:

•a VIE that must be consolidated because the Company is the primary beneficiary or the joint venture is not a VIE and the Company holds the majority voting interest with no significant participative rights available to the other partners; or

•a VIE that does not require consolidation and is treated as an equity method investment because the Company is not the primary beneficiary or the joint venture is not a VIE and the Company does not hold the majority voting interest.

Many of the joint ventures are deemed to be VIEs because they lack sufficient equity to finance the activities of the joint venture.

Unconsolidated joint ventures are accounted for under the equity method. For those joint ventures, the Company's investment balances for the joint venture are included in other assets on the condensed consolidated balance sheets and the Company’s pro rata share of net income or loss is included in operating income. The Company’s investments in equity method joint ventures on the condensed consolidated balance sheets as of September 30, 2020 and December 31, 2019 were a net asset of $1,370 and $1,292, respectively. During the three and nine months ended September 30, 2020, the Company recognized expense of $50 and $127, respectively, from equity method joint ventures. During the three and nine months ended September 30, 2019, the Company recognized expense of $73 and $147, respectively from equity method joint ventures.

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Redeemable Non-controlling Interests

9 Months Ended

Sep. 30, 2020

Noncontrolling Interest [Abstract]

Redeemable Non-controlling Interests

REDEEMABLE NON-CONTROLLING INTERESTS

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the third quarter of 2015 has the right, beginning on the fifth anniversary of the final funding of the variable rate construction and term loans due 2023 and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned subsidiary, a call option. The Company’s investment fund, which was formed in the third quarter of 2015, also includes a right, beginning on the sixth anniversary of the final funding and extending for one year, for the non-controlling interest holder to elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the second quarter of 2017 has the right, beginning on the fifth anniversary of the final funding of the non-controlling interest holder and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned subsidiary, a call option. The Company’s investment fund formed in the second quarter of 2017 also includes a right, beginning on the sixth anniversary of the final funding and extending for one year, for the non-controlling interest holder to elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the second quarter of 2018 has the right, beginning on the fifth anniversary of the investment fund’s final project being placed into service and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned subsidiary, a call option. The Company’s investment fund formed in the second quarter of 2018 also includes a right, upon the expiration of the call option and extending for six months, for the non-controlling interest holder to elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the fourth quarter of 2018 has the right, beginning on the fifth anniversary on the last projects placed in-service date and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned subsidiary, a call option. The Company’s investment fund formed in the fourth quarter of 2018 also includes a right, upon the expiration of the call option and extending for six months, for the non-controlling interest partner to elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the fourth quarter of 2019 has the right, beginning on the fifth anniversary on the last projects placed in-service date and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned subsidiary, a call option. The Company’s investment fund formed in the fourth quarter of 2019 also includes a right, beginning six months after the fifth anniversary of the final funding and extending for one year, for the non-controlling interest partner to elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The purchase price for two of the investment funds investors’ interests under the call options is equal to the fair market value of such interest at the time the option is exercised. The purchase price for two of the investment funds investor’s interests under the call options is equal to the greater of (i) the fair market value of such interests at the time the option is exercised or (ii) 7% of the investors’ contributed capital balance at the time the option is exercisable. The purchase price for the remaining investment fund investor’s interests under the call options is equal to the greater of (i) the fair market value of such interests at the time the option is exercised or (ii) 5% of the investors’ contributed capital balance at the time the option is exercisable. The call options are

exercisable beginning on the date that specified conditions are met for each respective fund. None of the call options are expected to become exercisable prior to 2021.

The purchase price for two of the funds investors’ interests in the investment funds under the put options is the lessor of fair market value at the time the option is exercised and a specified amount, ranging from $659 - $917. The purchase price for the two of the remaining funds investors’ interest in the investment funds under the put options is the sum of (i) the fair market value at the time the option is exercised, and (ii) the closing costs incurred by the investor in connection with the exercise of the put option. The purchase price for the remaining fund investors’ interest in the investment funds under the put options is the lessor of fair market value at the time the option is exercised and the sum of (i) 5% of the investors’ contributed capital balance at the time the option is exercisable, and (ii) the fair market value of any unpaid tax law change losses incurred by the investor in connection with the exercise of the put option. The put options for the investment funds are exercisable beginning on the date that specified conditions are met for each respective fund. The put options are not expected to become exercisable prior to 2022.

Because the put options represents redemption features that are not solely within the control of the Company, the non-controlling interests in these funds are presented outside of permanent equity. Redeemable non-controlling interests are reported using the greater of their carrying value at each reporting date (which is impacted by attribution under the hypothetical liquidation at book value method) or their estimated redemption value in each reporting period. At both September 30, 2020 and December 31, 2019 redeemable non-controlling interests were reported at their carrying value totaling $36,421 and $31,616, respectively, as the carrying value at each reporting period was greater than the estimated redemption value.

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Earnings Per Share and Other Equity Related Information

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Earnings Per Share and Other Equity Related Information

EARNINGS PER SHARE AND OTHER EQUITY RELATED INFORMATION

Earnings Per Share

Basic earnings per share is calculated using the Company’s weighted-average outstanding common shares, including vested restricted shares. When the effects are not anti-dilutive, diluted earnings per share is calculated using the weighted-average outstanding common shares; the dilutive effect of convertible preferred stock, under the “if converted” method; and the treasury stock method with regard to warrants and stock options; all as determined under the treasury stock method.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Numerator:
Net income attributable to common shareholders	$	20,002	$	8,870	$	30,568	$	22,233
Adjustment for accretion of tax equity financing fees	(91)		—		(91)		—
Income attributable to common shareholders	$	19,911	$	8,870	$	30,477	$	22,233
Denominator:
Basic weighted-average shares outstanding	47,788		46,555		47,597		46,413
Effect of dilutive securities:
Stock options	1,313		1,138		1,188		1,262
Diluted weighted-average shares outstanding	49,101		47,693		48,785		47,675
Net income per share attributable to common shareholders:
Basic	$	0.42	$	0.19	$	0.64	$	0.48
Diluted	$	0.41	$	0.19	$	0.62	$	0.47
Potentially dilutive shares(1)	1,268		1,152		1,146		642
(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.

Stock-based Compensation Expense

The Company recorded stock-based compensation expense, including expense related to the ESPP, as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Stock-based compensation expense	$	521	$	413	$	1,380	$	1,195

The compensation expense is included in selling, general and administrative expenses in the condensed consolidated statements of income. As of September 30, 2020, there was $11,970 of unrecognized compensation expense related to non-vested stock option awards that is expected to be recognized over a weighted-average period of 2.6 years.

No awards to individuals who were not either an employee or director of the Company were granted during the nine months ended September 30, 2020 or during the year ended December 31, 2019.

Stock Option Grants

The Company’s 2020 Stock Incentive Plan (the “2020 Plan”), was adopted by the Company’s Board of Directors in February 2020 and approved by its stockholders in May 2020. The 2020 Plan provides for the grant of incentive stock options, non-statutory stock options, stock appreciation rights, restricted stock awards and other stock-based awards. Upon its effectiveness, 5,000 shares of the Company’s Class A common stock were reserved for issuance under the 2020 Plan.

During the three months ended September 30, 2020, the Company granted 95 common stock options to certain employee and directors under its 2020 Stock Incentive Plan, which have a contractual life of ten years and vest over a five-year period. During the nine months ended September 30, 2020, the Company granted 376 common stock options to certain employees and directors under its 2010 and 2020 Stock Incentive Plans, which have a contractual life of ten years and vest over a five-year period.

Employee Stock Purchase Plan

In May 2020, the Company amended its 2017 Employee Stock Purchase Plan ("ESPP") which permits eligible employees to purchase up to an aggregate of 350 shares of the Company’s Class A common stock. This plan commenced December 1, 2017 and was previously amended on August 2018. The ESPP allows participants to purchase shares of common stock at a 5% discount from the fair market value of the stock as determined on specific dates at six-month intervals. During the nine months ended September 30, 2020 and 2019, the Company issued 28 and 22 shares, respectively, under the ESPP.

Share Repurchase Program

In April 2016, the Company’s Board of Directors authorized the repurchase of up to $10,000 of the Company’s Class A common stock from time to time on the open market in privately negotiated transactions. The Company’s Board of Directors authorized an increase in the Company’s share repurchase authorization to $15,000 of the Company's Class A common stock in February 2017 and to $17,553 of the Company's Class A common stock in August 2019, in each case, from time to time on the open market or in privately negotiated transactions. The timing and amount of any shares repurchased will be determined by the Company's management based on its evaluation of market conditions and other factors. Any repurchased shares will be available for use in connection with its stock plans and for other corporate purposes. The repurchase program has and will be funded using the Company's working capital and borrowings under its revolving line of credit. The Company accounts for share repurchases using the cost method. Under this method, the cost of the share repurchase is recorded entirely in treasury stock, a contra equity account. During the nine months ended September 30, 2020, the Company repurchased an immaterial amount of shares of common stock. During the three and nine months ended September 30, 2019, the Company repurchased 10 shares of common stock.

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Business Segment Information

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Business Segment Information

BUSINESS SEGMENT INFORMATIONThe Company reports results under ASC 280, Segment Reporting. The Company’s reportable segments are U.S. Regions, U.S. Federal, Canada and Non-Solar Distributed Generation (“DG”). The Company’s 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, which include the construction of small-scale plants that the company owns or develops for customers that produce electricity, gas, heat or cooling from renewable sources of energy and O&M services. The Company’s 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 the Company owns and O&M services for customer owned small-scale plants. The “All Other” category offers enterprise energy management services, consulting services 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 reports of the Company’s chief operating decision maker do not include assets at the operating segment level. The accounting policies are the same as those described in the summary of significant accounting policies in Note 2 included in the Company’s annual report on Form 10-K for the year ended December 31, 2019 filed with the Securities and Exchange Commission on March 4, 2020.

An analysis of the Company’s business segment information and reconciliation to the condensed consolidated financial statements is as follows:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total Consolidated
Three Months Ended September 30, 2020
Revenues	$	92,944	$	118,303	$	12,263	$	28,251	$	30,746	$	282,507
Interest income	32		2		—		—		—		34
Interest expense	892		340		992		1,510		34		3,768
Depreciation and amortization of intangible assets	3,239		995		402		5,013		426		10,075
Unallocated corporate activity	—		—		—		—		—		(9,361)
Income before taxes, excluding unallocated corporate activity	7,225		16,121		446		2,391		3,967		30,150
Three Months Ended September 30, 2019
Revenues	$	84,079	$	71,258	$	12,665	$	21,875	$	22,149	$	212,026
Interest income	69		92		—		21		—		182
Interest expense	1,548		209		179		1,213		—		3,149
Depreciation and amortization of intangible assets	2,538		901		396		5,149		429		9,413
Unallocated corporate activity	—		—		—		—		—		(8,482)
Income before taxes, excluding unallocated corporate activity	3,350		10,967		1,577		977		881		17,752
Nine Months Ended September 30, 2020
Revenues	$	266,373	$	271,539	$	32,690	$	74,104	$	73,250	$	717,956
Interest income	102		76		—		16		—		194
Interest expense	4,563		1,431		1,329		3,683		67		11,073
Depreciation and amortization of intangible assets	9,002		2,953		1,174		15,720		1,231		30,080
Unallocated corporate activity	—		—		—		—		—		(30,104)
Income before taxes, excluding unallocated corporate activity	15,960		33,162		741		6,964		7,035		63,862
Nine Months Ended September 30, 2019
Revenues	$	227,896	$	169,337	$	27,696	$	66,370	$	69,022	$	560,321
Interest income	132		160		—		65		39		396
Interest expense	4,118		627		517		4,075		—		9,337
Depreciation and amortization of intangible assets	7,184		2,524		986		16,051		1,153		27,898
Unallocated corporate activity	—		—		—		—		—		(25,331)
Income before taxes, excluding unallocated corporate activity	5,530		26,631		1,529		5,758		7,592		47,040

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Debt

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Debt

DEBT

As of September 30, 2020 and December 31, 2019, the Company’s outstanding debt obligations are comprised of the following:

	Commencement Date	Maturity Date	Acceleration Clause(2)	Rate as of September 30, 2020		September 30, 2020		December 31, 2019
Senior secured credit facility, interest at varying rates monthly in arrears	Jun 2015	Jun 2024	NA	3.41	%	$	114,632	$	112,216
Variable rate term loan payable in semi-annual installments	Jan 2006	Feb 2021	Yes	2.48	%	350		625
Variable rate term loan payable in semi-annual installments	Jan 2006	Jun 2024	Yes	2.23	%	6,081		6,609
Term loan payable in quarterly installments	Mar 2011	Mar 2021	Yes	7.25	%	339		831
Term loan payable in monthly installments	Oct 2011	Jun 2028	NA	6.11	%	3,196		3,649
Variable rate term loan payable in quarterly installments	Oct 2012	May 2025	NA	2.48	%	39,936		28,217
Variable rate term loan payable in quarterly installments	Sep 2015	Mar 2023	NA	2.98	%	15,534		15,976
Term loan payable in quarterly installments	Aug 2016	Jul 2031	NA	4.95	%	3,378		3,769
Term loan payable in quarterly installments	Mar 2017	Mar 2028	NA	5.00	%	3,204		3,521
Term loan payable in monthly installments	Apr 2017	Apr 2027	NA	4.50	%	19,538		22,553
Term loan payable in quarterly installments	Apr 2017	Feb 2034	NA	5.61	%	2,479		2,706
Variable rate term loan payable in quarterly installments	Jun 2017	Dec 2027	NA	2.68	%	11,126		11,740
Variable rate term loan payable in quarterly installments	Feb 2018	Aug 2022	Yes	7.73	%	9,236		15,645
Term loan payable in quarterly installments	Jun 2018	Dec 2038	Yes	5.15	%	27,363		28,583
Variable rate term loan payable in semi-annual installments	Jun 2018	Jun 2033	Yes	2.28	%	8,665		9,003
Variable rate term loan payable in monthly/quarterly installments	Oct 2018	Oct 2029	Yes	2.65	%	8,583		9,092
Long term finance liability in semi-annual installments(3)	Jul 2019	Jul 2039	NA	0.28	%	3,732		3,841
Long term finance liability in semi-annual installments(3)	Nov 2019	July 2040	NA	—	%	8,312		8,794
Term loan payable in quarterly installments	Dec 2019	Dec 2021	Yes	6.50	%	15,655		27,226
Fixed rate note	Apr 2020	Apr 2040	NA	5.00	%	218		—
Construction revolver payable July 2021	Jul 2020	Jul 2022	Yes	1.98	%	10,659		—
Construction revolver payable Nov 2020	Jul 2020	Nov 2020	Yes	5.25	%	7,564		—
Financing leases(1)						26,098		28,497
						$	345,878	$	343,093
Less - current maturities						61,521		69,969
Less - deferred financing fees						6,230		6,943
Long-term debt and financing lease liabilities, net						$	278,127	$	266,181

(1) Financing leases do not include approximately $20,207 and $22,015 in future interest payments as of September 30, 2020 and December 31, 2019, respectively.

(2) These agreements have acceleration causes that, in the event of default, as defined, the payee has the option to accelerate payment terms and make due the remaining principal and the required interest balance according to the agreement.

(3) These agreements are sale-leaseback arrangements that provide for the sale of solar PV projects to a third party investor and the simultaneous leaseback of the projects. In accordance with Topic 842, Leases, these transactions are accounted for as failed sales as the Company retains control of the underlying assets and as such, are classified as financing liabilities. The low interest rates are the results of tax credits which were transferred to the counterparty.

Senior Secured Credit Facility - Revolver and Term Loan

In March 2020, the Company amended the Company’s senior secured credit facility which increased the total funded debt to EBITDA covenant ratio to a maximum of 3.75 for the year ended December 31, 2020. The amendment also increased the Eurocurrency Rate floor to 1% from 0%. The total commitment under the amended credit facility (revolving credit, term loan and swing line) remains unchanged, which is $185,000.

At September 30, 2020, funds of $45,668 are available for borrowing under the revolving credit facility.

April 2020 Note

In April 2020, the Company issued a note to a developer in connection with the acquisition of one energy project, discussed in Note 6. The note provides a principal amount of $218 and bears interest at a fixed rate of 5%. The principal and interest payments can be redeemed at any time after the issue date within 20 years before the note is expired after the issuance and prior to maturity in April 2040. At September 30, 2020, $218 was outstanding under this note.

May 2020 Credit Facility

In May 2020, the Company amended a non-recourse credit facility with two banks. The amended and restated credit facility replaces and extended the Company’s existing credit facility to May 27, 2025 from May 31, 2020. The amended credit facility provides an amended principal amount of $41,850. The amended credit facility bears interest at a rate of 2.25% above LIBOR. The interest rate increases by 0.125% above the base rate every three years following the date of execution. The principal and interest payments are due in quarterly installments. At September 30, 2020, $39,936 was outstanding under the amended credit facility, net of debt discount and deferred financing fees.

June 2020 Construction Revolver

In June 2020, the Company entered into a revolving credit agreement with a bank, with an aggregate borrowing capacity of $100,000 for use in financing the construction cost of its owned projects. The facility bears interest at (i) 1.5% above LIBOR or (ii) 0.5% above a base rate defined in the credit agreement, dependent on the type of borrowing requested by the Company. The revolving facility matures in November 2020, with all remaining unpaid amounts outstanding under the facility due at that time. As of September 30, 2020, the Company has drawn $7,564 under the construction revolving facility.

July 2020 Construction Revolver

In July 2020, the Company entered into a revolving credit agreement with a bank, with an aggregate borrowing capacity of $30,000 for use in financing the Company’s construction cost of energy projects. The facility may, at the Company’s request, be increased by up to an additional $20,000 after certain conditions have been met. The facility bears interest at a rate of 1.75% over LIBOR and matures in July 2022, with all remaining unpaid amounts outstanding under the facility due at that time.

The project loan drawn under the revolving facility matures at the earlier of (i) 12 months from the funding of project loan or (ii) July 17, 2022. As of September 30, 2020, $10,659 was outstanding under the revolving facility, net of debt discount and deferred financing fees. Funds of $18,956 are available for borrowing under this revolving facility.

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Subsequent Event	9 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Event	SUBSEQUENT EVENTOn October 23, 2020, the Company amended a non-recourse credit facility with a bank. The amended and restated credit facility replaced and extended the Company's existing facility to March 31, 2026 from August 31, 2022. The amended credit facility provides an amended principal amount up to $50 million and bears interest at a rate of 6% above LIBOR. The principal and interest payments are due in quarterly installments. Within 60 days following October 23, 2020, the Company is required to maintain interest rate protection through hedging agreements covering an aggregate notional amount of not less than 50% of and not more than 95% of the aggregate outstanding principal amount of the loans.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Fair Value Measurement

In August 2018, the FASB issued ASU 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement, which modifies the disclosure requirements on fair value measurements. ASU 2018-13 was effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company adopted this guidance as of January 1, 2020 and the adoption did not have a material impact on the Company’s condensed consolidated financial statements.

Consolidations

In October 2018, the FASB issued ASU 2018-17, Consolidation (Topic 810), Targeted Improvements to Related Party Guidance for Variable Interest Entities, which aligns the evaluation of whether a decision maker's fee is a variable interest with the guidance in the primary beneficiary test by requiring the decision maker to consider an indirect interest in a VIE held by related party under common control on a proportionate basis. The new standard was effective for interim and annual periods beginning after December 15, 2019, with early adoption permitted. The Company adopted this guidance as of January 1, 2020 and the adoption did not have an impact on the Company’s condensed consolidated financial statements.

Credit Losses

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13), and a subsequent amendment to the initial guidance, ASU 2018-19 Codification Improvements to Topic 326, Financial Instruments—Credit Losses (collectively, Topic 326). Topic 326 requires measurement and recognition of expected credit losses for financial assets held, which include, but are not limited to, trade and other receivables. The new standard was effective for fiscal years beginning after December 15, 2019. The Company adopted this guidance as of January 1, 2020 and the adoption did not have a material impact on the Company’s condensed consolidated financial statements.

In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives, and Hedging, and Topic 825, Financial Instruments. The improvements to Topic 815, among other things, clarifies some areas around partial-term fair value hedges, interest rate risk, the amortization of fair value hedge basis adjustments and their disclosure, and some clarification of matters related to the transitioning to ASU 2017-12, which was adopted by the Company during the year ended December 31, 2018. The improvements to Topic 326 clarify certain aspects surrounding accounting for credit losses in connection with the Company’s receivables. These include that the Company should consider anticipated recoveries in its calculation of credit losses. For those that have already adopted ASU No. 2017-12, the new standard

was effective the first annual period beginning after the issuance date of ASU No. 2019-04, or as of January 1, 2020 for the Company, with early adoption permitted. The Company adopted this guidance as of January 1, 2020 and the adoption did not have a material impact on the Company’s condensed consolidated financial statements.

Income Taxes

In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes, which eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. ASU 2019-12 is effective for the Company for the fiscal year beginning after December 15, 2020. The Company is currently evaluating the impacts of the provisions of ASU 2019-12 on its condensed consolidated financial statements and disclosures.

Others

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 2020-0, 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. The Company is currently evaluating the impact that adopting this new accounting standard will have on its condensed consolidated financial statements and related disclosures.

Earnings Per Share

Earnings Per Share

Basic earnings per share is calculated using the Company’s weighted-average outstanding common shares, including vested restricted shares. When the effects are not anti-dilutive, diluted earnings per share is calculated using the weighted-average outstanding common shares; the dilutive effect of convertible preferred stock, under the “if converted” method; and the treasury stock method with regard to warrants and stock options; all as determined under the treasury stock method.

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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Summary of Accounts Receivable, Allowance for Credit Loss

Changes in the allowance for credit losses are as follows:

	September 30, 2020		September 30, 2019
Allowance for credit loss, beginning of period	$	2,260	$	2,765
Recoveries of costs and expenses, net	(1,089)		(134)
Account write-offs and other	(191)		(45)
Allowance for credit loss, end of period	$	980	$	2,586

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Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Summary of Disaggregation of Revenue

The following tables provide information about disaggregated revenue by line of business, reportable segments, and geographical region for the three and nine months ended September 30, 2020 and 2019.

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Line of Business
Three Months Ended September 30, 2020
Project revenue	$	79,201	$	105,444	$	9,311	$	7,506	$	13,941	$	215,403
O&M revenue	4,492		11,384		—		2,009		36		17,921
Energy assets	9,060		1,325		1,227		18,535		161		30,308
Other	191		150		1,725		201		16,608		18,875
Total revenues	$	92,944	$	118,303	$	12,263	$	28,251	$	30,746	$	282,507
Three Months Ended September 30, 2019
Project revenue	$	72,667	$	58,199	$	9,380	$	3,059	$	2,592	$	145,897
O&M revenue	4,280		11,123		—		2,330		88		17,821
Energy assets	6,699		1,339		1,327		16,421		—		25,786
Other	433		597		1,958		65		19,469		22,522
Total revenues	$	84,079	$	71,258	$	12,665	$	21,875	$	22,149	$	212,026
Nine Months Ended September 30, 2020
Project revenue	$	226,734	$	233,778	$	24,342	$	12,881	$	22,027	$	519,762
O&M revenue	13,127		33,765		26		6,144		229		53,291
Energy assets	25,556		3,549		3,234		54,341		599		87,279
Other	956		447		5,088		738		50,395		57,624
Total revenues	$	266,373	$	271,539	$	32,690	$	74,104	$	73,250	$	717,956
Nine Months Ended September 30, 2019
Project revenue	$	196,284	$	134,954	$	20,112	$	6,318	$	8,818	$	366,486
O&M revenue	11,580		30,370		5		6,771		109		48,835
Energy assets	18,063		2,958		2,585		52,612		582		76,800
Other	1,969		1,055		4,994		669		59,513		68,200
Total revenues	$	227,896	$	169,337	$	27,696	$	66,370	$	69,022	$	560,321

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total
Geographical Regions
Three Months Ended September 30, 2020
United States	$	92,944	$	118,303	$	655	$	28,251	$	16,173	$	256,326
Canada	—		—		11,608		—		22		11,630
Other	—		—		—		—		14,551		14,551
Total revenues	$	92,944	$	118,303	$	12,263	$	28,251	$	30,746	$	282,507
Three Months Ended September 30, 2019
United States	$	84,079	$	71,258	$	1,023	$	21,875	$	17,936	$	196,171
Canada	—		—		11,642		—		50		11,692
Other	—		—		—		—		4,163		4,163
Total revenues	$	84,079	$	71,258	$	12,665	$	21,875	$	22,149	$	212,026
Nine Months Ended September 30, 2020
United States	$	266,373	$	271,539	$	2,173	$	74,104	$	49,294	$	663,483
Canada	—		—		30,517		—		124		30,641
Other	—		—		—		—		23,832		23,832
Total revenues	$	266,373	$	271,539	$	32,690	$	74,104	$	73,250	$	717,956
Nine Months Ended September 30, 2019
United States	$	227,896	$	169,337	$	2,281	$	66,370	$	56,052	$	521,936
Canada	—		—		25,415		—		157		25,572
Other	—		—		—		—		12,813		12,813
Total revenues	$	227,896	$	169,337	$	27,696	$	66,370	$	69,022	$	560,321

Summary of Contract with Customer, Asset and Liability

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers:

	September 30, 2020		December 31, 2019
Accounts receivable, net	$	121,672	$	95,863
Accounts receivable retainage, net	$	24,359	$	16,976
Contract Assets:
Costs and estimated earnings in excess of billings	$	179,909	$	202,243
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	40,302	$	32,178

	September 30, 2019		December 31, 2018
Accounts receivable, net	$	91,755	$	85,985
Accounts receivable retainage, net	$	16,652	$	13,516
Contract Assets:
Costs and estimated earnings in excess of billings	$	124,652	$	86,842
Contract Liabilities:
Billings in excess of cost and estimated earnings	$	28,768	$	30,706

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Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2020

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 attributable to each reporting unit are as follows:

	U.S. Regions		U.S. Federal		Canada		Non-solar DG		Other		Total
Carrying Value of Goodwill
Balance, December 31, 2019	$	26,705	$	3,981	$	3,369	$	—	$	24,359	$	58,414
Currency effects	—		—		(88)		—		(154)		(242)
Balance, September 30, 2020	$	26,705	$	3,981	$	3,281	$	—	$	24,205	$	58,172
Accumulated Goodwill Impairment
Balance, December 31, 2019	$	—	$	—	$	(1,016)	$	—	$	—	$	(1,016)
Balance, September 30, 2020	$	—	$	—	$	(1,016)	$	—	$	—	$	(1,016)

Schedule of Gross Carrying Amount and Accumulated Amortization of Intangible Assets

The gross carrying amount and accumulated amortization of intangible assets are as follows:

	As of September 30, 2020		As of December 31, 2019
Gross Carrying Amount
Customer contracts	$	7,847	$	7,904
Customer relationships	12,634		12,749
Non-compete agreements	3,021		3,037
Technology	2,719		2,732
Trade names	542		544
Total gross carrying amount	26,763		26,966
Accumulated Amortization
Customer contracts	7,847		7,844
Customer relationships	11,585		11,236
Non-compete agreements	3,021		3,037
Technology	2,706		2,704
Trade names	532		531
Total accumulated amortization	25,691		25,352
Intangible assets, net	$	1,072	$	1,614

Schedule of Amortization Expense

Amortization expense is as follows:

		Three Months Ended September 30,				Nine Months Ended September 30,
Asset type	Location	2020		2019		2020		2019
Customer contracts	Cost of revenues	$	15	$	22	$	60	$	67
All other intangible assets	Selling, general and administrative expenses	157		202		468		614
Total		$	172	$	224	$	528	$	681

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Energy Assets (Tables)

9 Months Ended

Sep. 30, 2020

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

Schedule of Energy Assets

Energy assets consist of the following:

	September 30, 2020		December 31, 2019
Energy assets	$	885,148	$	767,331
Less - accumulated depreciation and amortization	(215,009)		(187,870)
Energy assets, net	$	670,139	$	579,461

Schedule of Financing Lease Assets

Included in the above energy assets are financing lease assets and associated accumulated depreciation and amortization, as follows:

	September 30, 2020		December 31, 2019
Financing lease assets	$	42,402	$	42,402
Less - accumulated depreciation and amortization	(7,865)		(6,268)
Financing lease assets, net	$	34,537	$	36,134

Supplemental balance sheet information related to leases at September 30, 2020 and December 31, 2019 is as follows:

	September 30, 2020			December 31, 2019
Operating Leases:
Operating lease assets	$	36,336		$	32,791
Current operating lease liabilities	6,010			5,802
Long-term portions of operating lease liabilities	32,509			29,101
Total operating lease liabilities	$	38,519		$	34,903
Weighted-average remaining lease term	11 years			11 years
Weighted-average discount rate	6.0		%	6.3		%
Financing Leases:
Energy assets, net	$	34,537		$	36,134
Current portions of financing lease liabilities	4,746			4,997
Long-term financing lease liabilities, less current portions and net of deferred financing fees	21,352			23,500
Total financing lease liabilities	$	26,098		$	28,497
Weighted-average remaining lease term	16 years			17 years
Weighted-average discount rate	11.9		%	11.8		%

Schedule of Depreciation and Amortization Expense of Energy Assets

Depreciation and amortization expense on the above energy assets, net of deferred grant amortization, included in the condensed consolidated statements of income is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
Location	2020		2019		2020		2019
Cost of revenues	$	9,547	$	8,843	$	28,496	$	26,338

Schedule of Depreciation and Amortization Expense of Energy Assets, Finance Lease Assets

Included in the above depreciation and amortization expense on energy assets is depreciation and amortization on financing lease assets, as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
Location	2020		2019		2020		2019
Cost of revenues	$	533	$	533	$	1,597	$	1,597

The costs related to the Company’s leases are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Operating Lease:
Operating lease costs	$	2,001	$	1,913	$	5,933	$	5,660
Financing Lease:
Amortization expense	533		533		1,597		1,597
Interest on lease liabilities	723		854		2,282		2,750
Total lease costs	$	3,257	$	3,300	$	9,812	$	10,007

Schedule of Capitalized Interest

The Company capitalized interest costs as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Capitalized interest	$	1,096	$	632	$	2,870	$	2,210

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2020

Income Tax Disclosure [Abstract]

Reconciliation of Gross Unrecognized Tax Benefits

A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:

	Gross Unrecognized Tax Benefits
Balance, December 31, 2019	$	400
Balance, September 30, 2020	$	400

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Leases (Tables)

9 Months Ended

Sep. 30, 2020

Leases [Abstract]

Schedule of Assets and Liabilities, Lessee

Included in the above energy assets are financing lease assets and associated accumulated depreciation and amortization, as follows:

	September 30, 2020		December 31, 2019
Financing lease assets	$	42,402	$	42,402
Less - accumulated depreciation and amortization	(7,865)		(6,268)
Financing lease assets, net	$	34,537	$	36,134

Supplemental balance sheet information related to leases at September 30, 2020 and December 31, 2019 is as follows:

	September 30, 2020			December 31, 2019
Operating Leases:
Operating lease assets	$	36,336		$	32,791
Current operating lease liabilities	6,010			5,802
Long-term portions of operating lease liabilities	32,509			29,101
Total operating lease liabilities	$	38,519		$	34,903
Weighted-average remaining lease term	11 years			11 years
Weighted-average discount rate	6.0		%	6.3		%
Financing Leases:
Energy assets, net	$	34,537		$	36,134
Current portions of financing lease liabilities	4,746			4,997
Long-term financing lease liabilities, less current portions and net of deferred financing fees	21,352			23,500
Total financing lease liabilities	$	26,098		$	28,497
Weighted-average remaining lease term	16 years			17 years
Weighted-average discount rate	11.9		%	11.8		%

Schedule of Other Lease Cost Details

Included in the above depreciation and amortization expense on energy assets is depreciation and amortization on financing lease assets, as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
Location	2020		2019		2020		2019
Cost of revenues	$	533	$	533	$	1,597	$	1,597

The costs related to the Company’s leases are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Operating Lease:
Operating lease costs	$	2,001	$	1,913	$	5,933	$	5,660
Financing Lease:
Amortization expense	533		533		1,597		1,597
Interest on lease liabilities	723		854		2,282		2,750
Total lease costs	$	3,257	$	3,300	$	9,812	$	10,007

Schedule of Operating Lease Liability Maturity

The Company’s estimated minimum future lease obligations under our leases are as follows: 

	Operating Leases		Financing Leases
Year ended December 31,
2020	$	2,339	$	4,014
2021	7,342		6,792
2022	6,716		5,178
2023	5,381		3,676
2024	4,500		2,565
Thereafter	28,115		24,080
Total minimum lease payments	$	54,393	$	46,305
Less: interest	15,874		20,207
Present value of lease liabilities	$	38,519	$	26,098

Schedule of Finance Lease Liability Maturity

The Company’s estimated minimum future lease obligations under our leases are as follows: 

	Operating Leases		Financing Leases
Year ended December 31,
2020	$	2,339	$	4,014
2021	7,342		6,792
2022	6,716		5,178
2023	5,381		3,676
2024	4,500		2,565
Thereafter	28,115		24,080
Total minimum lease payments	$	54,393	$	46,305
Less: interest	15,874		20,207
Present value of lease liabilities	$	38,519	$	26,098

Schedule of Amount Related to Sale Leasebacks

A summary of amounts related to sale leasebacks in the Company’s condensed consolidated balance sheets is as follows:

	September 30, 2020		December 31, 2019
Financing lease assets, net	$	34,537	$	36,134
Deferred loss, short-term, net	115		115
Deferred loss, long-term, net	1,715		1,801
Total deferred loss	$	1,830	$	1,916
Financing lease liabilities, short-term	4,746		4,997
Financing lease liabilities, long-term	21,352		23,500
Total financing lease liabilities	$	26,098	$	28,497
Deferred gain, short-term, net	345		345
Deferred gain, long-term, net	5,206		5,463
Total deferred gain	$	5,551	$	5,808

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Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Liabilities Measured on a Recurring Basis

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

		Fair Value as of
	Level	September 30, 2020		December 31, 2019
Assets:
Interest rate swap instruments	2	$	—	$	15
Commodity swap instruments	2	—		198
Total assets		$	—	$	213
Liabilities:
Interest rate swap instruments	2	$	11,128	$	6,236
Commodity swap instruments	2	44		—
Make-whole provisions	2	1,352		918
Contingent consideration	3	678		678
Total liabilities		$	13,202	$	7,832

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

The following table sets forth a summary of changes in fair value of contingent liability classified as level 3 for the nine months ended September 30, 2020 and September 30, 2019:

	Nine Months Ended September 30, 2020		Nine Months Ended September 30, 2019
Contingent consideration liability balance at December 31, 2019 and 2018	$	678	$	600
Changes in the fair value of contingent consideration obligation	—		50
Contingent consideration liability balance at September 30, 2020 and 2019	$	678	$	650

Schedule of Fair Value and Carrying Value for Company's Long-Term Debt

Based on the analysis performed, the fair value and the carrying value of the Company’s long-term debt, excluding financing leases, are as follows:

	As of September 30, 2020				As of December 31, 2019
	Fair Value		Carrying Value		Fair Value		Carrying Value
Long-term debt (Level 2)	$	318,816	$	313,550	$	309,377	$	307,508

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Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2020

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 the Company’s derivative instruments as follows at September 30, 2020 and December 31, 2019:

		Derivatives as of
		September 30, 2020		December 31, 2019
	Balance Sheet Location	Fair Value		Fair Value
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other assets	$	—	$	15
Interest rate swap contracts	Other liabilities	$	10,816	$	6,210
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other liabilities	$	312	$	26
Commodity swap contracts	Other assets	$	—	$	198
Commodity swap contracts	Other liabilities	$	44	$	—
Make-whole provisions	Other liabilities	$	1,352	$	918

Other Derivatives	Classification	Effective Date	Expiration Date	Fair Value ($)
Make-whole provisions	Liability	June/August 2018	December 2038	$	534
Make-whole provisions	Liability	August 2016	April 2031	432
Make-whole provisions	Liability	April 2017	February 2034	386

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

The following tables present information about the effects of the Company’s derivative instruments on the condensed consolidated statements of income and condensed consolidated statements of comprehensive income:

		Amount of (Gain) Loss Recognized in Net Income
	Location of (Gain) Loss Recognized in Net Income	Three Months Ended September 30,				Nine Months Ended September 30,
		2020		2019		2020		2019
Derivatives Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	503	$	44	$	908	$	(6)
Derivatives Not Designated as Hedging Instruments:
Interest rate swap contracts	Other expenses, net	$	287	$	(3)	$	287	$	66
Commodity swap contracts	Other expenses, net	194		(31)		241		(203)
Make-whole provisions	Other expenses, net	(27)		(150)		443		(935)

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

	Nine Months Ended September 30, 2020
Derivatives Designated as Hedging Instruments:
Accumulated loss in AOCI at the beginning of the period	$	(4,742)
Unrealized loss recognized in AOCI	(4,623)
Loss reclassified from AOCI to other expenses, net	1,211
Net loss on derivatives	(3,412)
Accumulated loss in AOCI at the end of the period	$	(8,154)

Schedule of Active Derivative Instruments

The following tables present a listing of the Company’s active derivative instruments as of September 30, 2020:

Active Interest Rate Swap	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
3-Year, 2.46% Fixed	March 2018	December 2020	17,100		Not 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-Year, 5.30% Fixed	February 2006	February 2021	3,256		Designated
15.5-Year, 5.40% Fixed	September 2008	March 2024	13,081		Designated

Active Commodity Swap	Effective Date	Expiration Date	Initial Notional Amount (Volume)	Commodity Measurement	Status
1-Year, $2.70 MMBtu Fixed	May 2020	April 2021	435,810	MMBtus	Not Designated

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Investment Funds And Other Variable Interest Entities (Tables)

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Variable Interest Entities

A summary of amounts related to the investment funds in the Company’s condensed consolidated balance sheets is as follows:

	September 30,		December 31,
	2020(1)		2019(1)
Cash and cash equivalents	$	9,179	$	4,666
Restricted cash	1,248		586
Accounts receivable, net	867		532
Costs and estimated earnings in excess of billings	2,168		1,125
Prepaid expenses and other current assets	128		108
Total VIE current assets	13,590		7,017
Property and equipment, net	1,266		1,266
Energy assets, net	145,008		142,456
Operating lease assets	6,483		6,511
Other assets	331		1,662
Total VIE assets	$	166,678	$	158,912
Current portions of long-term debt and financing lease liabilities	$	2,243	$	2,252
Accounts payable	594		2,006
Accrued expenses and other current liabilities	1,553		2,203
Current portions of operating lease liabilities	121		102
Total VIE current liabilities	4,511		6,563
Long-term debt and financing lease liabilities, net of current portion and deferred financing fees	23,626		24,654
Long-term operating lease liabilities, net of current portion	6,302		6,180
Other liabilities	895		1,171
Total VIE liabilities	$	35,334	$	38,568

(1) The amounts in the above table are reflected in Note 1 on the Company’s condensed consolidated balance sheets. See the Company’s condensed consolidated balance sheets for additional information.

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Earnings Per Share and Other Equity Related Information (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

Basic earnings per share is calculated using the Company’s weighted-average outstanding common shares, including vested restricted shares. When the effects are not anti-dilutive, diluted earnings per share is calculated using the weighted-average outstanding common shares; the dilutive effect of convertible preferred stock, under the “if converted” method; and the treasury stock method with regard to warrants and stock options; all as determined under the treasury stock method.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Numerator:
Net income attributable to common shareholders	$	20,002	$	8,870	$	30,568	$	22,233
Adjustment for accretion of tax equity financing fees	(91)		—		(91)		—
Income attributable to common shareholders	$	19,911	$	8,870	$	30,477	$	22,233
Denominator:
Basic weighted-average shares outstanding	47,788		46,555		47,597		46,413
Effect of dilutive securities:
Stock options	1,313		1,138		1,188		1,262
Diluted weighted-average shares outstanding	49,101		47,693		48,785		47,675
Net income per share attributable to common shareholders:
Basic	$	0.42	$	0.19	$	0.64	$	0.48
Diluted	$	0.41	$	0.19	$	0.62	$	0.47
Potentially dilutive shares(1)	1,268		1,152		1,146		642
(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.

Schedule of Share-based Compensation Expense

The Company recorded stock-based compensation expense, including expense related to the ESPP, as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Stock-based compensation expense	$	521	$	413	$	1,380	$	1,195

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Business Segment Information (Tables)

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Schedule of Operational Results by Business Segments

An analysis of the Company’s business segment information and reconciliation to the condensed consolidated financial statements is as follows:

	U.S. Regions		U.S. Federal		Canada		Non-Solar DG		All Other		Total Consolidated
Three Months Ended September 30, 2020
Revenues	$	92,944	$	118,303	$	12,263	$	28,251	$	30,746	$	282,507
Interest income	32		2		—		—		—		34
Interest expense	892		340		992		1,510		34		3,768
Depreciation and amortization of intangible assets	3,239		995		402		5,013		426		10,075
Unallocated corporate activity	—		—		—		—		—		(9,361)
Income before taxes, excluding unallocated corporate activity	7,225		16,121		446		2,391		3,967		30,150
Three Months Ended September 30, 2019
Revenues	$	84,079	$	71,258	$	12,665	$	21,875	$	22,149	$	212,026
Interest income	69		92		—		21		—		182
Interest expense	1,548		209		179		1,213		—		3,149
Depreciation and amortization of intangible assets	2,538		901		396		5,149		429		9,413
Unallocated corporate activity	—		—		—		—		—		(8,482)
Income before taxes, excluding unallocated corporate activity	3,350		10,967		1,577		977		881		17,752
Nine Months Ended September 30, 2020
Revenues	$	266,373	$	271,539	$	32,690	$	74,104	$	73,250	$	717,956
Interest income	102		76		—		16		—		194
Interest expense	4,563		1,431		1,329		3,683		67		11,073
Depreciation and amortization of intangible assets	9,002		2,953		1,174		15,720		1,231		30,080
Unallocated corporate activity	—		—		—		—		—		(30,104)
Income before taxes, excluding unallocated corporate activity	15,960		33,162		741		6,964		7,035		63,862
Nine Months Ended September 30, 2019
Revenues	$	227,896	$	169,337	$	27,696	$	66,370	$	69,022	$	560,321
Interest income	132		160		—		65		39		396
Interest expense	4,118		627		517		4,075		—		9,337
Depreciation and amortization of intangible assets	7,184		2,524		986		16,051		1,153		27,898
Unallocated corporate activity	—		—		—		—		—		(25,331)
Income before taxes, excluding unallocated corporate activity	5,530		26,631		1,529		5,758		7,592		47,040

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Debt (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

As of September 30, 2020 and December 31, 2019, the Company’s outstanding debt obligations are comprised of the following:

	Commencement Date	Maturity Date	Acceleration Clause(2)	Rate as of September 30, 2020		September 30, 2020		December 31, 2019
Senior secured credit facility, interest at varying rates monthly in arrears	Jun 2015	Jun 2024	NA	3.41	%	$	114,632	$	112,216
Variable rate term loan payable in semi-annual installments	Jan 2006	Feb 2021	Yes	2.48	%	350		625
Variable rate term loan payable in semi-annual installments	Jan 2006	Jun 2024	Yes	2.23	%	6,081		6,609
Term loan payable in quarterly installments	Mar 2011	Mar 2021	Yes	7.25	%	339		831
Term loan payable in monthly installments	Oct 2011	Jun 2028	NA	6.11	%	3,196		3,649
Variable rate term loan payable in quarterly installments	Oct 2012	May 2025	NA	2.48	%	39,936		28,217
Variable rate term loan payable in quarterly installments	Sep 2015	Mar 2023	NA	2.98	%	15,534		15,976
Term loan payable in quarterly installments	Aug 2016	Jul 2031	NA	4.95	%	3,378		3,769
Term loan payable in quarterly installments	Mar 2017	Mar 2028	NA	5.00	%	3,204		3,521
Term loan payable in monthly installments	Apr 2017	Apr 2027	NA	4.50	%	19,538		22,553
Term loan payable in quarterly installments	Apr 2017	Feb 2034	NA	5.61	%	2,479		2,706
Variable rate term loan payable in quarterly installments	Jun 2017	Dec 2027	NA	2.68	%	11,126		11,740
Variable rate term loan payable in quarterly installments	Feb 2018	Aug 2022	Yes	7.73	%	9,236		15,645
Term loan payable in quarterly installments	Jun 2018	Dec 2038	Yes	5.15	%	27,363		28,583
Variable rate term loan payable in semi-annual installments	Jun 2018	Jun 2033	Yes	2.28	%	8,665		9,003
Variable rate term loan payable in monthly/quarterly installments	Oct 2018	Oct 2029	Yes	2.65	%	8,583		9,092
Long term finance liability in semi-annual installments(3)	Jul 2019	Jul 2039	NA	0.28	%	3,732		3,841
Long term finance liability in semi-annual installments(3)	Nov 2019	July 2040	NA	—	%	8,312		8,794
Term loan payable in quarterly installments	Dec 2019	Dec 2021	Yes	6.50	%	15,655		27,226
Fixed rate note	Apr 2020	Apr 2040	NA	5.00	%	218		—
Construction revolver payable July 2021	Jul 2020	Jul 2022	Yes	1.98	%	10,659		—
Construction revolver payable Nov 2020	Jul 2020	Nov 2020	Yes	5.25	%	7,564		—
Financing leases(1)						26,098		28,497
						$	345,878	$	343,093
Less - current maturities						61,521		69,969
Less - deferred financing fees						6,230		6,943
Long-term debt and financing lease liabilities, net						$	278,127	$	266,181

(1) Financing leases do not include approximately $20,207 and $22,015 in future interest payments as of September 30, 2020 and December 31, 2019, respectively.

(2) These agreements have acceleration causes that, in the event of default, as defined, the payee has the option to accelerate payment terms and make due the remaining principal and the required interest balance according to the agreement.

(3) These agreements are sale-leaseback arrangements that provide for the sale of solar PV projects to a third party investor and the simultaneous leaseback of the projects. In accordance with Topic 842, Leases, these transactions are accounted for as failed sales as the Company retains control of the underlying assets and as such, are classified as financing liabilities. The low interest rates are the results of tax credits which were transferred to the counterparty.

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Basis of Presentation (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
CARES Act, payroll taxes to be paid in 2021 and 2022	$ 5,000
CARES Act, tax benefit associated with net operating loss	2,000
CARES Act, tax refund	1,700
CARES Act, AMT tax	$ 3,600

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Summary of Significant Accounting Policies - Allowance for Credit Loss (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	$ 2,260	$ 2,765
Recoveries of costs and expenses, net	(1,089)	(134)
Account write-offs and other	(191)	(45)
Allowance for credit loss, end of period	$ 980	$ 2,586

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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 282,507	$ 212,026	$ 717,956	$ 560,321
United States
Disaggregation of Revenue [Line Items]
Revenues	256,326	196,171	663,483	521,936
Canada
Disaggregation of Revenue [Line Items]
Revenues	11,630	11,692	30,641	25,572
Other
Disaggregation of Revenue [Line Items]
Revenues	14,551	4,163	23,832	12,813
Project revenue
Disaggregation of Revenue [Line Items]
Revenues	215,403	145,897	519,762	366,486
O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	17,921	17,821	53,291	48,835
Energy assets
Disaggregation of Revenue [Line Items]
Revenues	30,308	25,786	87,279	76,800
Other
Disaggregation of Revenue [Line Items]
Revenues	18,875	22,522	57,624	68,200
U.S. Regions
Disaggregation of Revenue [Line Items]
Revenues	92,944	84,079	266,373	227,896
U.S. Regions | United States
Disaggregation of Revenue [Line Items]
Revenues	92,944	84,079	266,373	227,896
U.S. Regions | Canada
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
U.S. Regions | Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
U.S. Regions | Project revenue
Disaggregation of Revenue [Line Items]
Revenues	79,201	72,667	226,734	196,284
U.S. Regions | O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	4,492	4,280	13,127	11,580
U.S. Regions | Energy assets
Disaggregation of Revenue [Line Items]
Revenues	9,060	6,699	25,556	18,063
U.S. Regions | Other
Disaggregation of Revenue [Line Items]
Revenues	191	433	956	1,969
U.S. Federal
Disaggregation of Revenue [Line Items]
Revenues	118,303	71,258	271,539	169,337
U.S. Federal | United States
Disaggregation of Revenue [Line Items]
Revenues	118,303	71,258	271,539	169,337
U.S. Federal | Canada
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
U.S. Federal | Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
U.S. Federal | Project revenue
Disaggregation of Revenue [Line Items]
Revenues	105,444	58,199	233,778	134,954
U.S. Federal | O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	11,384	11,123	33,765	30,370
U.S. Federal | Energy assets
Disaggregation of Revenue [Line Items]
Revenues	1,325	1,339	3,549	2,958
U.S. Federal | Other
Disaggregation of Revenue [Line Items]
Revenues	150	597	447	1,055
Canada
Disaggregation of Revenue [Line Items]
Revenues	12,263	12,665	32,690	27,696
Canada | United States
Disaggregation of Revenue [Line Items]
Revenues	655	1,023	2,173	2,281
Canada | Canada
Disaggregation of Revenue [Line Items]
Revenues	11,608	11,642	30,517	25,415
Canada | Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Canada | Project revenue
Disaggregation of Revenue [Line Items]
Revenues	9,311	9,380	24,342	20,112
Canada | O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	0	0	26	5
Canada | Energy assets
Disaggregation of Revenue [Line Items]
Revenues	1,227	1,327	3,234	2,585
Canada | Other
Disaggregation of Revenue [Line Items]
Revenues	1,725	1,958	5,088	4,994
Non-Solar DG
Disaggregation of Revenue [Line Items]
Revenues	28,251	21,875	74,104	66,370
Non-Solar DG | United States
Disaggregation of Revenue [Line Items]
Revenues	28,251	21,875	74,104	66,370
Non-Solar DG | Canada
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Non-Solar DG | Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Non-Solar DG | Project revenue
Disaggregation of Revenue [Line Items]
Revenues	7,506	3,059	12,881	6,318
Non-Solar DG | O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	2,009	2,330	6,144	6,771
Non-Solar DG | Energy assets
Disaggregation of Revenue [Line Items]
Revenues	18,535	16,421	54,341	52,612
Non-Solar DG | Other
Disaggregation of Revenue [Line Items]
Revenues	201	65	738	669
All Other
Disaggregation of Revenue [Line Items]
Revenues	30,746	22,149	73,250	69,022
All Other | United States
Disaggregation of Revenue [Line Items]
Revenues	16,173	17,936	49,294	56,052
All Other | Canada
Disaggregation of Revenue [Line Items]
Revenues	22	50	124	157
All Other | Other
Disaggregation of Revenue [Line Items]
Revenues	14,551	4,163	23,832	12,813
All Other | Project revenue
Disaggregation of Revenue [Line Items]
Revenues	13,941	2,592	22,027	8,818
All Other | O&M revenue
Disaggregation of Revenue [Line Items]
Revenues	36	88	229	109
All Other | Energy assets
Disaggregation of Revenue [Line Items]
Revenues	161	0	599	582
All Other | Other
Disaggregation of Revenue [Line Items]
Revenues	$ 16,608	$ 19,469	$ 50,395	$ 59,513

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Revenue from Contracts with Customers - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percentage of revenue recognized over time	95.00%	93.00%	94.00%	91.00%
Contract with customer, liability, noncurrent	$ 4,982,000		$ 4,982,000		$ 5,560,000
Contract with customer, asset, reclassified to receivable			464,712,000	$ 282,568,000
Contract with customer, asset, revenue recognized			434,709,000	317,088,000
Contract with customer, liability, revenue recognized			85,356,000	92,685,000
Contract with customer, liability, billings			86,203,000	92,427,000
Revenue, remaining performance obligation	$ 2,154,526,000		$ 2,154,526,000
Revenue, remaining performance obligation, percentage	31.00%		31.00%
Capitalized contract cost, gross	$ 1,735,000		$ 1,735,000		1,735,000
Capitalized project development costs, noncurrent	1,228,000		1,228,000		$ 1,080,000
Capitalized contract cost, project development costs	$ 3,611,000	$ 2,048,000	9,546,000	13,081,000
Capitalized contract cost, impairment loss			$ 0	$ 0
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract receivable retainage percentage	5.00%		5.00%
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract receivable retainage percentage	10.00%		10.00%

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Revenue from Contracts with Customers - Contract Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2020		Dec. 31, 2019		Sep. 30, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 121,672	[1]	$ 95,863	[1]	$ 91,755	$ 85,985
Accounts receivable retainage, net	24,359		16,976		16,652	13,516
Contract Assets:
Costs and estimated earnings in excess of billings	179,909	[1]	202,243	[1]	124,652	86,842
Contract Liabilities:
Billings in excess of cost and estimated earnings	$ 40,302		$ 32,178		$ 28,768	$ 30,706

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at September 30, 2020 and December 31, 2019 of $166,678 and $158,912, respectively. Includes non-recourse liabilities of consolidated VIEs at September 30, 2020 and December 31, 2019 of $35,334 and $38,568, respectively. See Note 12.

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Business Acquisitions and Related Transactions - Additional Information (Details) - Solar Photovoltaic Projects	9 Months Ended
	Sep. 30, 2020
Minimum
Business Acquisition [Line Items]
Estimated useful life	1 year
Maximum
Business Acquisition [Line Items]
Estimated useful life	15 years

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Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Carrying Value of Goodwill
Balance, December 31, 2019	$ 58,414
Currency effects	(242)
Balance, September 30, 2020	58,172
Accumulated Goodwill Impairment	(1,016)	$ (1,016)
Operating Segments | U.S. Regions
Carrying Value of Goodwill
Balance, December 31, 2019	26,705
Currency effects	0
Balance, September 30, 2020	26,705
Accumulated Goodwill Impairment	0	0
Operating Segments | U.S. Federal
Carrying Value of Goodwill
Balance, December 31, 2019	3,981
Currency effects	0
Balance, September 30, 2020	3,981
Accumulated Goodwill Impairment	0	0
Operating Segments | Canada
Carrying Value of Goodwill
Balance, December 31, 2019	3,369
Currency effects	(88)
Balance, September 30, 2020	3,281
Accumulated Goodwill Impairment	(1,016)	(1,016)
Operating Segments | Non-solar DG
Carrying Value of Goodwill
Balance, December 31, 2019	0
Currency effects	0
Balance, September 30, 2020	0
Accumulated Goodwill Impairment	0	0
Operating Segments | Other
Carrying Value of Goodwill
Balance, December 31, 2019	24,359
Currency effects	(154)
Balance, September 30, 2020	24,205
Accumulated Goodwill Impairment	$ 0	$ 0

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Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Reporting units, fair value in excess of carrying amounts					15.00%
Gross Carrying Amount	$ 26,763		$ 26,763		$ 26,966
Accumulated Amortization	25,691		25,691		25,352
Intangible assets, net	1,072		1,072		1,614
Amortization of intangible assets	172	$ 224	528	$ 681
Customer contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,847		7,847		7,904
Accumulated Amortization	7,847		7,847		7,844
Amortization of intangible assets	15	22	60	67
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	157	$ 202	468	$ 614
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,634		12,634		12,749
Accumulated Amortization	11,585		11,585		11,236
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,021		3,021		3,037
Accumulated Amortization	3,021		3,021		3,037
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,719		2,719		2,732
Accumulated Amortization	2,706		2,706		2,704
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	542		542		544
Accumulated Amortization	$ 532		$ 532		$ 531
Minimum | Customer contracts
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets useful life			1 year
Minimum | Other intangible assets
Finite-Lived Intangible Assets [Line Items]
All other acquired intangible assets useful life			4 years
Maximum | Customer contracts
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets useful life			5 years
Maximum | Other intangible assets
Finite-Lived Intangible Assets [Line Items]
All other acquired intangible assets useful life			15 years

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Energy Assets - Energy Assets (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Energy assets, net	[1]	$ 670,139	$ 579,461
Energy Assets
Property, Plant and Equipment [Line Items]
Energy assets		885,148	767,331
Less - accumulated depreciation and amortization		(215,009)	(187,870)
Energy assets, net		$ 670,139	$ 579,461

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at September 30, 2020 and December 31, 2019 of $166,678 and $158,912, respectively. Includes non-recourse liabilities of consolidated VIEs at September 30, 2020 and December 31, 2019 of $35,334 and $38,568, respectively. See Note 12.

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Energy Assets - Financing Lease Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Financing lease assets	$ 42,402	$ 42,402
Less - accumulated depreciation and amortization	(7,865)	(6,268)
Financing lease assets, net	$ 34,537	$ 36,134

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Energy Assets - Additional Information (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2020 USD ($) project	Jun. 30, 2020 USD ($) project	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) project	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) project	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Depreciation and amortization expense, cost of revenues	$ 9,547,000		$ 8,843,000	$ 28,496,000	$ 26,338,000
Depreciation and amortization on financing lease assets, cost of revenues	533,000		533,000	1,597,000	1,597,000
Energy asset impairment charges	1,028,000			1,028,000
Capitalized interest costs	$ 1,096,000		632,000	$ 2,870,000	2,210,000
Number of ESPC projects included in energy assets that the Company owns and operates | project	3			3		3
Contract with customer, liability	$ 40,302,000		$ 28,768,000	$ 40,302,000	28,768,000	$ 32,178,000	$ 30,706,000
Contract with customer, current liability	35,320,000			35,320,000		26,618,000
Asset retirement obligation recorded in project assets	1,484,000			1,484,000
Asset retirement obligation liability recorded in accrued expenses	1,622,000			1,622,000
Depreciation of property and equipment				2,492,000	$ 2,115,000
ARO accretion expense	21,000			64,000
ARO Asset
Business Acquisition [Line Items]
Depreciation of property and equipment	20,000			58,000
Solar Projects 2020
Business Acquisition [Line Items]
Contingent consideration, liability	1,446,000			$ 1,446,000
Number of projects under definitive agreement to acquire | project				8
Solar Projects 2020, Additional Projects
Business Acquisition [Line Items]
Business acquisition, total purchase price				$ 10,242,000
Amount paid to developers of projects				0
Energy Project
Business Acquisition [Line Items]
Number of projects acquired | project		1
Asset acquisition, total purchase price		$ 1,251,000
Asset acquisition, cash paid		1,031,000
Asset acquisition, note payable		204,000
Asset acquisition, value of rollover equity in connection with shares		$ 16,000
Energy Assets
Business Acquisition [Line Items]
Contract with customer, liability	11,077,000			11,077,000		10,243,000
Energy Assets | Accrued expenses and other current liabilities
Business Acquisition [Line Items]
Contract with customer, current liability	$ 225,000			$ 225,000		$ 827,000

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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax provision	$ 3,100	$ 939	$ 597	$ 2,000
Effective tax rate, percentage	14.90%	10.10%	1.80%	9.20%
Unrecognized tax benefits	$ 80		$ 80		$ 80

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Income Taxes - Unrecognized Tax Benefits (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, December 31, 2019	$ 400
Balance, September 30, 2020	$ 400

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Leases - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jan. 31, 2020	Sep. 30, 2018
Lessee, Lease, Description [Line Items]
Operating lease revenue	$ 2,261,000	$ 2,243,000	$ 6,546,000	$ 6,737,000
Net amortization expense	57,000	$ 57,000	170,000	$ 172,000
Maximum combined funding amount					$ 150,000,000	$ 100,000,000
Available funding under lending commitment	$ 130,000,000		$ 130,000,000
Minimum
Lessee, Lease, Description [Line Items]
Operating lease renewal term	6 months		6 months
Maximum
Lessee, Lease, Description [Line Items]
Operating lease renewal term	7 years		7 years

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Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Operating Leases:
Operating lease assets	[1]	$ 36,336	$ 32,791
Current operating lease liabilities	[1]	6,010	5,802
Long-term portions of operating lease liabilities	[1]	32,509	29,101
Total operating lease liabilities		$ 38,519	$ 34,903
Operating lease, weighted-average remaining lease term (in years)		11 years	11 years
Operating lease, weighted-average discount rate (as a percent)		6.00%	6.30%
Financing Leases:
Energy assets, net		$ 34,537	$ 36,134
Current portions of financing lease liabilities		4,746	4,997
Long-term financing lease liabilities, less current portions and net of deferred financing fees		21,352	23,500
Total financing lease liabilities		$ 26,098	$ 28,497
Financing lease, weighted-average remaining lease term (in years)		16 years	17 years
Financing lease, weighted-average discount rate (as a percent)		11.90%	11.80%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]		us-gaap:PropertyPlantAndEquipmentOtherNet	us-gaap:PropertyPlantAndEquipmentOtherNet
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]		us-gaap:LongTermDebtAndCapitalLeaseObligations	us-gaap:LongTermDebtAndCapitalLeaseObligations

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at September 30, 2020 and December 31, 2019 of $166,678 and $158,912, respectively. Includes non-recourse liabilities of consolidated VIEs at September 30, 2020 and December 31, 2019 of $35,334 and $38,568, respectively. See Note 12.

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Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating Leases:
Operating lease costs	$ 2,001	$ 1,913	$ 5,933	$ 5,660
Financing Leases:
Amortization expense	533	533	1,597	1,597
Interest on lease liabilities	723	854	2,282	2,750
Total lease costs	$ 3,257	$ 3,300	$ 9,812	$ 10,007

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Leases - Minimum Future Lease Obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Operating Leases
2020	$ 2,339
2021	7,342
2022	6,716
2023	5,381
2024	4,500
Thereafter	28,115
Total minimum lease payments	54,393
Less: interest	15,874
Present value of lease liabilities	38,519	$ 34,903
Financing Leases
2020	4,014
2021	6,792
2022	5,178
2023	3,676
2024	2,565
Thereafter	24,080
Total minimum lease payments	46,305
Less: interest	20,207	22,015
Present value of lease liabilities	$ 26,098	$ 28,497

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Leases - Schedule of Sale Leaseback Transactions (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Sale Leaseback Transaction [Line Items]
Financing lease assets, net	$ 34,537	$ 36,134
Financing lease liabilities, short-term	4,746	4,997
Financing lease liabilities, long-term	21,352	23,500
Present value of lease liabilities	26,098	28,497
Solar Photovoltaic Projects
Sale Leaseback Transaction [Line Items]
Financing lease assets, net	34,537	36,134
Deferred loss, short-term, net	115	115
Deferred loss, long-term, net	1,715	1,801
Total deferred loss	1,830	1,916
Financing lease liabilities, short-term	4,746	4,997
Financing lease liabilities, long-term	21,352	23,500
Present value of lease liabilities	26,098	28,497
Deferred gain, short-term, net	345	345
Deferred gain, long-term, net	5,206	5,463
Total deferred gain	$ 5,551	$ 5,808

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Commitments and Contingencies (Details) - USD ($)	1 Months Ended
	Aug. 31, 2018	Sep. 30, 2020	Apr. 30, 2020	Dec. 31, 2019	Nov. 30, 2018
Undisclosed Name of Acquiree 2
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	$ 555,000	$ 678,000		$ 678,000
Undisclosed Name of Acquiree 3
Loss Contingencies [Line Items]
Contingent consideration, liability		$ 378,000		$ 378,000	$ 363,000
Undisclosed Name of Acquiree 4
Loss Contingencies [Line Items]
Contingent consideration, liability, fair value at date of acquisition			$ 0

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Fair Value Measurement - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Liabilities:
Total liabilities	$ 13,202	$ 7,832
Level 2
Assets:
Total assets	0	213
Level 2 | Interest rate swap instruments
Assets:
Total assets	0	15
Liabilities:
Liability derivatives	11,128	6,236
Level 2 | Commodity swap instruments
Assets:
Total assets	0	198
Liabilities:
Liability derivatives	44	0
Level 2 | Make-whole provisions
Liabilities:
Liability derivatives	1,352	918
Level 3
Liabilities:
Contingent consideration	$ 678	$ 678

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Fair Value Measurement - Additional Information (Details)	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Probability of low case scenario, percentage	50.00%
Probability of base case scenario, percentage	50.00%
Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value disclosure, nonrecurring	$ 0	$ 0
Undisclosed Name of Acquiree 1 | Make-whole provisions | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability, measurement input percentage	0.18

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Fair Value Measurement - Changes in Contingent Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration liability balance at December 31, 2019 and 2018	$ 678	$ 600
Changes in the fair value of contingent consideration obligation	0	50
Contingent consideration liability balance at September 30, 2020 and 2019	$ 678	$ 650

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Fair Value Measurement - Fair Value and Carrying Value of Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Long-term debt value (Level 2), Fair Value	$ 318,816	$ 309,377
Long-term debt value (Level 2), Carrying Value	$ 313,550	$ 307,508

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Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments on the Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Designated | Interest rate swap instruments | Other assets
Derivatives, Fair Value [Line Items]
Asset derivatives	$ 0	$ 15
Designated | Interest rate swap instruments | Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	10,816	6,210
Not Designated | Interest rate swap instruments | Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	312	26
Not Designated | Commodity swap contracts | Other assets
Derivatives, Fair Value [Line Items]
Asset derivatives	0	198
Not Designated | Commodity swap contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	44	0
Not Designated | Make-whole provisions | Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	$ 1,352	$ 918

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Derivative Instruments and Hedging Activities - Additional Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($) contract	Sep. 30, 2020 USD ($) contract	Dec. 31, 2019 contract
Not Designated
Derivative [Line Items]
Number of instruments held | contract	4	4	3
Accumulated Gain (Loss), Net, Cash Flow Hedge
Derivative [Line Items]
Loss reclassified from AOCI to other expenses, net | $	$ 303	$ 1,211

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Derivative Instruments and Hedging Activities - Effects on Statements of Income (Loss) and Consolidated Statements of Comprehensive Loss (Details) - Other expenses, net - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Designated | Interest rate swap instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) Loss Recognized in Net Income	$ 503	$ 44	$ 908	$ (6)
Not Designated | Interest rate swap instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) Loss Recognized in Net Income	287	(3)	287	66
Not Designated | Commodity swap contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) Loss Recognized in Net Income	194	(31)	241	(203)
Not Designated | Make-whole provisions
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) Loss Recognized in Net Income	$ (27)	$ (150)	$ 443	$ (935)

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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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 439,673	$ 390,328	$ 428,856	$ 376,875
Total other comprehensive income (loss)	1,499	(1,491)	(4,181)	(3,660)
Ending balance	463,057	$ 401,986	463,057	$ 401,986
Accumulated Gain (Loss), Net, Cash Flow Hedge
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(4,742)
Unrealized loss recognized in AOCI			(4,623)
Loss reclassified from AOCI to other expenses, net	303		1,211
Total other comprehensive income (loss)			(3,412)
Ending balance	$ (8,154)		$ (8,154)

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Derivative Instruments and Hedging Activities - Summary of Active Derivative Instruments (Details)	9 Months Ended
	Sep. 30, 2020 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 May 2033
Derivative [Line Items]
Term of contract, years	13 years
Fixed interest rate, percentage	0.93%
Initial Notional Amount ($)	$ 9,505,000
Designated | Interest Rate Swap May 2033
Derivative [Line Items]
Term of contract, years	13 years
Fixed interest rate, percentage	0.93%
Initial Notional Amount ($)	$ 6,968,000
Designated | Interest Rate Swap - February 2021
Derivative [Line Items]
Term of contract, years	15 years
Fixed interest rate, percentage	5.30%
Initial Notional Amount ($)	$ 3,256,000
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 - December 2020
Derivative [Line Items]
Term of contract, years	3 years
Fixed interest rate, percentage	2.46%
Initial Notional Amount ($)	$ 17,100,000
Not Designated | Commodity Contract - April 2021
Derivative [Line Items]
Term of contract, years	1 year
Active commodity swap, price (in usd per unit) | $ / MMBTU	2.70
Nonmonetary notional amount (in MMBtus) | MMBTU	435,810
Not Designated | Make-whole Provisions December 2038 | Other liabilities
Derivative [Line Items]
Liability derivatives, fair value	$ 534,000
Not Designated | Make-whole Provisions April 2031 | Other liabilities
Derivative [Line Items]
Liability derivatives, fair value	432,000
Not Designated | Make-whole Provisions February 2034 | Other liabilities
Derivative [Line Items]
Liability derivatives, fair value	$ 386,000

XML

Investment Funds And Other Variable Interest Entities - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) fund	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) fund	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of investment funds | fund	5		5
Net asset position of equity method joint ventures	$ 1,370		$ 1,370		$ 1,292
Expense recognized from equity method joint ventures	$ 50	$ 73	$ 127	$ 147

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Investment Funds and Other Variable Interest Entities - Schedule of Variable Interest Entity Financial Information (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Variable interest entities, current assets	[1]	$ 456,579	$ 425,192
Total assets	[1]	1,584,697	1,374,013
Variable interest entities, current liabilities	[1]	338,667	336,647
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		13,590	7,017
Total assets		166,678	158,912
Variable interest entities, current liabilities		4,511	6,563
Total VIE liabilities		35,334	38,568
Cash and cash equivalents | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		9,179	4,666
Restricted cash | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		1,248	586
Accounts receivable, net | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		867	532
Costs and estimated earnings in excess of billings | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		2,168	1,125
Prepaid expenses and other current assets | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current assets		128	108
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		145,008	142,456
Operating lease assets | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent assets		6,483	6,511
Other assets | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent assets		331	1,662
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		2,243	2,252
Accounts payable | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current liabilities		594	2,006
Accrued expenses and other current liabilities | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current liabilities		1,553	2,203
Current portions of operating lease liabilities | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, current liabilities		121	102
Long-term debt and financing lease liabilities, net of current portion and deferred financing fees | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent liabilities		23,626	24,654
Long-term operating lease liabilities, net of current portion | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent liabilities		6,302	6,180
Other liabilities | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Variable interest entities, noncurrent liabilities		$ 895	$ 1,171

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at September 30, 2020 and December 31, 2019 of $166,678 and $158,912, respectively. Includes non-recourse liabilities of consolidated VIEs at September 30, 2020 and December 31, 2019 of $35,334 and $38,568, respectively. See Note 12.

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Redeemable Non-controlling Interests (Details) - USD ($)	3 Months Ended					9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2015	Sep. 30, 2020
Variable Interest Entity [Line Items]
Term of extension of call option	6 months	6 months	6 months	6 months	6 months
Term of extension of put option	6 months	6 months	6 months	1 year	1 year
Percentage of investor contributed capital balance, percentage						7.00%
Remaining investor contributed capital balance						5.00%
Redeemable non-controlling interests, net	$ 31,616,000					$ 36,421,000
Minimum
Variable Interest Entity [Line Items]
Exercise price of put options						659
Maximum
Variable Interest Entity [Line Items]
Exercise price of put options						$ 917

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Earnings Per Share and Other Equity Related Information - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income attributable to common shareholders	$ 20,002	$ 8,870	$ 30,568	$ 22,233
Adjustment for accretion of tax equity financing fees	(91)	0	(91)	0
Income attributable to common shareholders	$ 19,911	$ 8,870	$ 30,477	$ 22,233
Denominator:
Basic weighted-average shares outstanding (in shares)	47,788	46,555	47,597	46,413
Effect of dilutive securities:
Stock options (in shares)	1,313	1,138	1,188	1,262
Diluted weighted-average shares outstanding (in shares)	49,101	47,693	48,785	47,675
Net income per share attributable to common shareholders:
Basic (in usd per share)	$ 0.42	$ 0.19	$ 0.64	$ 0.48
Diluted (in usd per share)	$ 0.41	$ 0.19	$ 0.62	$ 0.47
Potentially dilutive shares (in shares)	1,268	1,152	1,146	642

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Earnings Per Share and Other Equity Related Information - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Aug. 31, 2019	Feb. 28, 2017	Apr. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock-based compensation expense		$ 521,000	$ 413,000	$ 1,380,000	$ 1,195,000
Treasury Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Open market purchase of common shares (in shares)			10,000	455	10,000
Class A Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock repurchase program, authorized amount (up to)						$ 17,553,000	$ 15,000,000	$ 10,000,000
Class A Common Stock | 2020 Stock Incentive Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares reserved for future issuance (in shares)	5,000,000
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Non-vested stock options unrecognized compensation expense		$ 11,970,000		$ 11,970,000
Non-vested stock options unrecognized compensation expense, weighted-average period of recognition				2 years 7 months 6 days
Options granted in period (in shares)		95,000		376,000
Stock options, contractual period				10 years
Stock options, vesting period		5 years		5 years
Stock Options | 2017 Employee Stock Purchase Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of allocated shares (up to) (in shares)	350,000
Discount from fair value of stock (as a percent)	5.00%
Stock issued during period (in shares)				28,000	22,000

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Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Revenues	$ 282,507	$ 212,026	$ 717,956	$ 560,321
Interest income	34	182	194	396
Interest expense	3,768	3,149	11,073	9,337
Depreciation and amortization of intangible assets	10,075	9,413	30,080	27,898
Income before taxes, excluding unallocated corporate activity	30,150	17,752	63,862	47,040
U.S. Regions
Segment Reporting Information [Line Items]
Revenues	92,944	84,079	266,373	227,896
U.S. Federal
Segment Reporting Information [Line Items]
Revenues	118,303	71,258	271,539	169,337
Canada
Segment Reporting Information [Line Items]
Revenues	12,263	12,665	32,690	27,696
Non-Solar DG
Segment Reporting Information [Line Items]
Revenues	28,251	21,875	74,104	66,370
All Other
Segment Reporting Information [Line Items]
Revenues	30,746	22,149	73,250	69,022
Operating Segments | U.S. Regions
Segment Reporting Information [Line Items]
Revenues	92,944	84,079	266,373	227,896
Interest income	32	69	102	132
Interest expense	892	1,548	4,563	4,118
Depreciation and amortization of intangible assets	3,239	2,538	9,002	7,184
Income before taxes, excluding unallocated corporate activity	7,225	3,350	15,960	5,530
Operating Segments | U.S. Federal
Segment Reporting Information [Line Items]
Revenues	118,303	71,258	271,539	169,337
Interest income	2	92	76	160
Interest expense	340	209	1,431	627
Depreciation and amortization of intangible assets	995	901	2,953	2,524
Income before taxes, excluding unallocated corporate activity	16,121	10,967	33,162	26,631
Operating Segments | Canada
Segment Reporting Information [Line Items]
Revenues	12,263	12,665	32,690	27,696
Interest income	0	0	0	0
Interest expense	992	179	1,329	517
Depreciation and amortization of intangible assets	402	396	1,174	986
Income before taxes, excluding unallocated corporate activity	446	1,577	741	1,529
Operating Segments | Non-Solar DG
Segment Reporting Information [Line Items]
Revenues	28,251	21,875	74,104	66,370
Interest income	0	21	16	65
Interest expense	1,510	1,213	3,683	4,075
Depreciation and amortization of intangible assets	5,013	5,149	15,720	16,051
Income before taxes, excluding unallocated corporate activity	2,391	977	6,964	5,758
Operating Segments | All Other
Segment Reporting Information [Line Items]
Revenues	30,746	22,149	73,250	69,022
Interest income	0	0	0	39
Interest expense	34	0	67	0
Depreciation and amortization of intangible assets	426	429	1,231	1,153
Income before taxes, excluding unallocated corporate activity	3,967	881	7,035	7,592
Unallocated Corporate Activity
Segment Reporting Information [Line Items]
Unallocated corporate activity	$ (9,361)	$ (8,482)	$ (30,104)	$ (25,331)

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Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Apr. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Financing leases		$ 26,098		$ 28,497
Debt and financing leases, gross		345,878		343,093
Less - current maturities		61,521		69,969
Less - deferred financing fees		6,230		6,943
Long-term debt and financing lease liabilities, net	[1]	278,127		266,181
Future interest payments		$ 20,207		22,015
Term Loan | Variable Rate Term Loan due February 2021
Debt Instrument [Line Items]
Weighted average interest rate, percentage		2.48%
Long-term debt, gross		$ 350		625
Term Loan | Variable Rate Term Loan due June 2024
Debt Instrument [Line Items]
Weighted average interest rate, percentage		2.23%
Long-term debt, gross		$ 6,081		6,609
Term Loan | Term Loan due March 2021
Debt Instrument [Line Items]
Fixed interest rate, percentage		7.25%
Long-term debt, gross		$ 339		831
Term Loan | Term Loan Payable due June 2028
Debt Instrument [Line Items]
Fixed interest rate, percentage		6.11%
Long-term debt, gross		$ 3,196		3,649
Term Loan | Variable Rate Term Loan due May 2025
Debt Instrument [Line Items]
Weighted average interest rate, percentage		2.48%
Long-term debt, gross		$ 39,936		28,217
Term Loan | Variable Rate Term Loan due March 2023
Debt Instrument [Line Items]
Weighted average interest rate, percentage		2.98%
Long-term debt, gross		$ 15,534		15,976
Term Loan | Term Loan due July 2031
Debt Instrument [Line Items]
Fixed interest rate, percentage		4.95%
Long-term debt, gross		$ 3,378		3,769
Term Loan | Term Loan due March 2028
Debt Instrument [Line Items]
Fixed interest rate, percentage		5.00%
Long-term debt, gross		$ 3,204		3,521
Term Loan | Term Loan due April 2027
Debt Instrument [Line Items]
Fixed interest rate, percentage		4.50%
Long-term debt, gross		$ 19,538		22,553
Term Loan | Term Loan due February 2034
Debt Instrument [Line Items]
Fixed interest rate, percentage		5.61%
Long-term debt, gross		$ 2,479		2,706
Term Loan | Variable Rate Term Loan due December 2027
Debt Instrument [Line Items]
Weighted average interest rate, percentage		2.68%
Long-term debt, gross		$ 11,126		11,740
Term Loan | Variable Rate Term Loan due August 2022
Debt Instrument [Line Items]
Weighted average interest rate, percentage		7.73%
Long-term debt, gross		$ 9,236		15,645
Term Loan | Term Loan due December 2038
Debt Instrument [Line Items]
Fixed interest rate, percentage		5.15%
Long-term debt, gross		$ 27,363		28,583
Term Loan | Variable Rate Term Loan due June 2033
Debt Instrument [Line Items]
Weighted average interest rate, percentage		2.28%
Long-term debt, gross		$ 8,665		9,003
Term Loan | Variable Rate Term Loan due October 2029
Debt Instrument [Line Items]
Weighted average interest rate, percentage		2.65%
Long-term debt, gross		$ 8,583		9,092
Term Loan | Term Loan due December 2021
Debt Instrument [Line Items]
Fixed interest rate, percentage		6.50%
Long-term debt, gross		$ 15,655		27,226
Long Term Finance Lease Liability | Long Term Finance Liability due July 2039
Debt Instrument [Line Items]
Weighted average interest rate, percentage		0.28%
Long-term debt, gross		$ 3,732		3,841
Long Term Finance Lease Liability | Long Term Finance Liability July 2040
Debt Instrument [Line Items]
Weighted average interest rate, percentage		0.00%
Long-term debt, gross		$ 8,312		8,794
Loans Payable | Fixed Rate Loan due April 2040
Debt Instrument [Line Items]
Fixed interest rate, percentage		5.00%	5.00%
Long-term debt, gross		$ 218		$ 0
Line of Credit | Construction Revolver Loans Payable Due In July 2022
Debt Instrument [Line Items]
Weighted average interest rate, percentage				1.98%
Line of Credit | Construction Revolver Loans Payable Due In November 2020
Debt Instrument [Line Items]
Weighted average interest rate, percentage				5.25%
Revolving Senior Secured Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate, percentage		3.41%
Long-term debt, gross		$ 114,632		$ 112,216
Revolving Credit Facility | Line of Credit | Construction Revolver Loans Payable Due In July 2022
Debt Instrument [Line Items]
Long-term debt, gross		10,659		0
Line of credit		10,659
Revolving Credit Facility | Line of Credit | Construction Revolver Loans Payable Due In November 2020
Debt Instrument [Line Items]
Long-term debt, gross		7,564		$ 0
Line of credit		$ 7,564

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at September 30, 2020 and December 31, 2019 of $166,678 and $158,912, respectively. Includes non-recourse liabilities of consolidated VIEs at September 30, 2020 and December 31, 2019 of $35,334 and $38,568, respectively. See Note 12.

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Debt - Additional Information (Details)		1 Months Ended					3 Months Ended
	Feb. 29, 2020	Jul. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	May 31, 2020 USD ($) bank	Apr. 30, 2020 USD ($) project	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($) project	Sep. 30, 2020 USD ($)
Energy Project
Debt Instrument [Line Items]
Number of projects acquired | project							1
Fixed Rate Loan due April 2040
Debt Instrument [Line Items]
Long-term debt								$ 218,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Total funded debt to EBITDA covenant ratio, maximum						3.75
Long-term debt						$ 185,000,000
Funds available for borrowing								45,668,000
Line of Credit | Revolving Credit Facility | Revolving Credit Agreement
Debt Instrument [Line Items]
Debt instrument, number of banks | bank				2
Maximum borrowing capacity				$ 41,850,000
Increase in interest rate				0.125%
Period for increase in interest rate				3 years
Line of credit								39,936,000
Line of Credit | Revolving Credit Facility | Construction Revolver Loans Payable Due In November 2020
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 100,000,000				$ 100,000,000
Line of credit								7,564,000
Line of Credit | Revolving Credit Facility | Construction Revolver Loans Payable Due In July 2022
Debt Instrument [Line Items]
Funds available for borrowing								18,956,000
Maximum borrowing capacity		$ 30,000,000
Line of credit								$ 10,659,000
Line of Credit | Revolving Credit Facility | Eurocurrency Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%					1.00%
Line of Credit | Revolving Credit Facility | LIBOR | Revolving Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate				2.25%
Line of Credit | Revolving Credit Facility | LIBOR | Construction Revolver Loans Payable Due In November 2020
Debt Instrument [Line Items]
Basis spread on variable rate			1.50%
Line of Credit | Revolving Credit Facility | LIBOR | Construction Revolver Loans Payable Due In July 2022
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%
Borrowing capacity Increase limit		$ 20,000,000
Line of Credit | Revolving Credit Facility | Base Rate | Construction Revolver Loans Payable Due In November 2020
Debt Instrument [Line Items]
Basis spread on variable rate			0.50%
Loans Payable | Fixed Rate Loan due April 2040
Debt Instrument [Line Items]
Original principal amount					$ 218,000
Fixed interest rate, percentage					5.00%			5.00%
Loans Payable | Fixed Rate Loan due April 2040 | Energy Project
Debt Instrument [Line Items]
Number of projects acquired | project					1

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Subsequent Event (Details) - Revolving Credit Facility - Line of Credit - Subsequent Event	Oct. 23, 2020 USD ($)
Subsequent Event [Line Items]
Principal amount	$ 50,000,000
Principal and interest payments due limit	60 days
Minimum
Subsequent Event [Line Items]
Interest rate protection through hedging agreements covering an aggregate notional amount	50.00%
Maximum
Subsequent Event [Line Items]
Interest rate protection through hedging agreements covering an aggregate notional amount	95.00%
LIBOR
Subsequent Event [Line Items]
Bearing interest rate	6.00%

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Label	Element	Value
Restricted Cash and Cash Equivalents, Noncurrent	us-gaap_RestrictedCashAndCashEquivalentsNoncurrent	$ 9,958,000
Restricted Cash and Cash Equivalents, Noncurrent	us-gaap_RestrictedCashAndCashEquivalentsNoncurrent	$ 22,782,000
Accounting Standards Update [Extensible List]	us-gaap_AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201409Member