Outstanding Loans and Security Agreements (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Schedule of Debt

The following is a summary of our debt as of December 31, 2020 (in thousands):

	Unpaid Principal Balance		Net Carrying Value						Unused Borrowing Capacity		Interest Rate	Maturity Dates	Entity	Recourse
			Current		Long- Term		Total
10.25% Senior Secured Notes due March 2027	$	70,000	$	—	$	68,614	$	68,614	$	—	10.25%	March 2027	Company	Yes
2.5% Green Convertible Senior Notes due August 2025	230,000		—		99,394		99,394				2.5%	August 2025	Company	Yes
Total recourse debt	300,000		—		168,008		168,008		—
7.5% Term Loan due September 2028	34,456		2,826		28,920		31,746		—		7.5%	September  2028	PPA IIIa	No
6.07% Senior Secured Notes due March 2030	77,837		3,882		73,125		77,007		—		6.1%	March 2030	PPA IV	No
LIBOR + 2.5% Term Loan due December 2021	114,761		114,138		—		114,138		—		LIBOR plus margin	December 2021	PPA V	No
Letters of Credit due December 2021	—		—		—		—		968		2.25%	December 2021	PPA V	No
Total non-recourse debt	227,054		120,846		102,045		222,891		968
Total debt	$	527,054	$	120,846	$	270,053	$	390,899	$	968

The following is a summary of our debt as of December 31, 2019 (in thousands):

	Unpaid Principal Balance		Net Carrying Value						Unused Borrowing Capacity		Interest Rate	Maturity Dates	Entity	Recourse
			Current		Long- Term		Total
LIBOR + 4% Loan due November 2020	$	1,571	$	1,536	$	—	$	1,536	$	—	LIBOR plus margin	November 2020	Company	Yes
5% Convertible Promissory Note due December 2020	33,104		36,482		—		36,482		—		5.0%	December 2020	Company	Yes
6% Convertible Promissory Notes due December 2020	289,299		273,410		—		273,410		—		6.0%	December 2020	Company	Yes
10% Notes due July 2024	93,000		14,000		75,962		89,962		—		10.0%	July 2024	Company	Yes
Total recourse debt	416,974		325,428		75,962		401,390		—
7.5% Term Loan due September 2028	38,337		3,882		31,087		34,969		—		7.5%	September 2028	PPA IIIa	No
6.07% Senior Secured Notes due March 2030	80,988		3,151		76,865		80,016		—		6.1%	March 2030	PPA IV	No
LIBOR + 2.5% Term Loan due December 2021	121,784		5,122		115,315		120,437		—		LIBOR plus margin	December 2021	PPA V	No
Letters of Credit due December 2021	—		—		—		—		1,220		2.25%	December 2021	PPA V	No
Total non-recourse debt	241,109		12,155		223,267		235,422		1,220
Total debt	$	658,083	$	337,583	$	299,229	$	636,812	$	1,220

Schedule of Repayment and Interest Expense

The following table presents details of our outstanding loan principal repayment schedule as of December 31, 2020 (in thousands):

2021	$	121,469
2022	16,393
2023	22,166
2024	24,886
2025	258,022
Thereafter	84,118
	$	527,054