Segment Information (Tables)

6 Months Ended

Jun. 30, 2022

Segment Reporting [Abstract]

Summary of Reconciliation of the Company's Reportable Segments' Net Income from Continuing Operations

The following tables are consistent with the manner in which the chief operating decision maker evaluates the performance of each segment and allocates the Company’s resources. In the following tables “RNG” refers to Renewable Natural Gas and “REG” refer to Renewable Electricity Generation.

	Three Months Ended June 30, 2022
	RNG		REG			Corporate			Total
Total revenue	$	64,566	$	4,329		$	(1,011	)	$	67,884
Net income (loss)		35,240		(1,415	)		(14,673	)		19,152
EBITDA (1)		38,920		(14	)		(9,784	)		29,122
Adjusted EBITDA (1)		38,947		28			(11,423	)		27,552
Total assets		149,351		55,791			109,109			314,251
Capital expenditures		2,803		(32	)		1			2,772

(1) Second quarter of 2022 EBITDA and Adjusted EBITDA Reconciliations

The following table is a reconciliation of the Company’s reportable segments’ net income (loss) from continuing operations to Adjusted EBITDA for the three months ended June 30, 2022:

	Three Months Ended June 30, 2022
	RNG		REG			Corporate			Total
Net income (loss)	$	35,240	$	(1,415	)	$	(14,673	)	$	19,152
Depreciation and amortization		3,680		1,401			53			5,134
Interest expense		—		—			271			271
Income tax expense		—		—			4,565			4,565
EBITDA	$	38,920	$	(14	)	$	(9,784	)	$	29,122
Impairment loss		27		42			—			69
Transaction costs		—		—			5			5
Unrealized gains on hedging activities							(1,644	)		(1,644	)
Adjusted EBITDA	$	38,947	$	28		$	(11,423	)	$	27,552

	Three Months Ended June 30, 2021
	RNG		REG			Corporate			Total
Total revenue	$	27,581	$	4,093		$	—		$	31,674
Net income (loss)		7,573		(27	)		(12,198	)		(4,652	)
EBITDA (1)		11,854		1,307			(8,048	)		5,113
Adjusted EBITDA (1)		11,854		1,307			(8,011	)		5,150
Total assets		156,505		53,369			41,774			251,648
Capital expenditures		2,708		425			—			3,133

(1) Second quarter of 2021 EBITDA and Adjusted EBITDA Reconciliations

The following table is a reconciliation of the Company’s reportable segments’ net income (loss) from continuing operations to Adjusted EBITDA for the three months ended June 30, 2021:

	Three Months Ended June 30, 2021
	RNG		REG			Corporate			Total
Net income (loss)	$	7,573	$	(27	)	$	(12,198	)	$	(4,652	)
Depreciation and amortization		4,281		1,334			45			5,660
Interest expense		—		—			720			720
Income tax expense		—		—			3,385			3,385
EBITDA	$	11,854	$	1,307		$	(8,048	)	$	5,113
Impairment loss		—		—			—			—
Transaction costs		—		—			37			37
Adjusted EBITDA	$	11,854	$	1,307		$	(8,011	)	$	5,150

The Company’s reportable segments for the six months ended June 30, 2022 and 2021 are Renewable Natural Gas and Renewable Electricity Generation.

	Six Months Ended June 30, 2022
	RNG		REG			Corporate			Total
Total revenue	$	97,233	$	8,300		$	(5,478	)	$	100,055
Net income (loss)		48,180		(2,594	)		(27,549	)		18,037
EBITDA (1)		55,538		201			(22,806	)		32,933
Adjusted EBITDA (1)		55,583		(68	)		(20,916	)		34,599
Total assets		149,351		55,791			109,109			314,251
Capital expenditures		3,814		1,328			6			5,148

(1) First six months of 2022 EBITDA and Adjusted EBITDA Reconciliations

The following table is a reconciliation of the Company’s reportable segments’ net income (loss) from continuing operations to Adjusted EBITDA for the six months ended June 30, 2022:

	Six Months Ended June 30, 2022
	RNG		REG			Corporate			Total
Net Income (loss)	$	48,180	$	(2,594	)	$	(27,549	)	$	18,037
Depreciation and amortization		7,358		2,795			133			10,286
Interest expense		—		—			303			303
Income tax expense		—		—			4,307			4,307
EBITDA	$	55,538	$	201		$	(22,806	)	$	32,933
Impairment loss		27		42			51			120
Transaction costs		—		—			32			32
Net loss (gain) on sale of assets		18		(311	)		—			(293	)
Unrealized losses on hedging activities		—		—			1,807			1,807
Adjusted EBITDA	$	55,583	$	(68	)	$	(20,916	)	$	34,599

	Six Months Ended June 30, 2021
	RNG		REG			Corporate			Total
Total revenue	$	55,704	$	7,417		$	—		$	63,121
Net income (loss)		18,134		(2,268	)		(34,783	)		(18,917	)
EBITDA (1)		26,633		542			(28,563	)		(1,388	)
Adjusted EBITDA (1)		26,633		1,168			(28,438	)		(637	)
Total assets		156,505		53,369			41,774			251,648
Capital expenditures		4,020		449			—			4,469

(2) First six months of 2021 EBITDA and Adjusted EBITDA Reconciliations

The following table is a reconciliation of the Company’s reportable segments’ net income (loss) from continuing operations to Adjusted EBITDA for the six months ended June 30, 2021:

	Six Months Ended June 30, 2021
	RNG		REG			Corporate			Total
Net income (loss)	$	18,134	$	(2,268	)	$	(34,783	)	$	(18,917	)
Depreciation and amortization		8,499		2,808			89			11,396
Interest expense		—		—			1,366			1,366
Income tax expense		—		2			4,765			4,767
EBITDA	$	26,633	$	542		$	(28,563	)	$	(1,388	)
Impairment loss		—		626			—			626
Transaction costs		—		—			125			125
Adjusted EBITDA	$	26,633	$	1,168		$	(28,438	)	$	(637	)

Summary of Revenue by Major Customers

For the three months ended June 30, 2022 and 2021, four and six customers, respectively, made up greater than 10% of total revenues.

	Three Months Ended June 30, 2022
	RNG			REG		Corporate		Total
Customer A		24.9	%		—		—		24.9	%
Customer B		15.0	%		—		—		15.0	%
Customer C		12.5	%		—		—		12.5	%
Customer D		10.1	%		—		—		10.1	%

	Three Months Ended June 30, 2021
	RNG			REG			Corporate		Total
Customer A		17.5	%		—			—		17.5	%
Customer B		16.6	%		—			—		16.6	%
Customer C		13.0	%		—			—		13.0	%
Customer D		—			12.1	%		—		12.1	%
Customer E		11.9	%		—			—		11.9	%
Customer F		11.8	%		—			—		11.8	%

For the six months ended June 30, 2022 and 2021, three and six customers, respectively, made up greater than 10% of total revenues.

	Six Months Ended June 30, 2022
	RNG			REG		Corporate		Total
Customer A		24.7	%		—		—		24.7	%
Customer B		13.6	%		—		—		13.6	%
Customer C		13.6	%		—		—		13.6	%

	Six Months Ended June 30, 2021
	RNG			REG			Corporate		Total
Customer A		13.8	%		—			—		13.8	%
Customer B		13.1	%		—			—		13.1	%
Customer C		13.1	%		—			—		13.1	%
Customer D		11.5	%		—			—		11.5	%
Customer E		11.1	%		—			—		11.1	%
Customer F		—			11.0	%		—		11.0	%