Fair Value - Estimated Fair Values and Carrying Values for Customer Receivables and Debt Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Aug. 31, 2020	May 01, 2020
10.25% Senior Secured Notes due March 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage				10.25%
10.25% Senior Secured Notes due March 2027 | Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage	10.25%	10.25%
2.5% Green Convertible Senior Notes due August 2025 | Senior Secured Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage	2.50%	2.50%	2.50%
7.5% Term Loan due September 2028 | Term Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage	7.50%	7.50%
6.07% Senior Secured Notes due March 2030 | Senior Secured Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage	6.07%	6.07%
3.04% Senior Secured Notes due June 2031 | Senior Secured Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage		3.04%
Net Carrying Value | Notes | 10.25% Senior Secured Notes due March 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	$ 69,056	$ 68,968
Net Carrying Value | Senior Secured Notes | 2.5% Green Convertible Senior Notes due August 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	223,355	222,863
Net Carrying Value | Senior Secured Notes | 6.07% Senior Secured Notes due March 2030
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	72,193	73,262
Net Carrying Value | Senior Secured Notes | 3.04% Senior Secured Notes due June 2031
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	129,910	132,631
Net Carrying Value | Term Loan | 7.5% Term Loan due September 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	28,298	29,006
Net Carrying Value | Customer financing receivables
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Customer financing receivables	43,880	45,269
Fair Value | Notes | 10.25% Senior Secured Notes due March 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	70,056	72,573
Fair Value | Senior Secured Notes | 2.5% Green Convertible Senior Notes due August 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	384,330	356,822
Fair Value | Senior Secured Notes | 6.07% Senior Secured Notes due March 2030
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument		83,251
Fair Value | Senior Secured Notes | 3.04% Senior Secured Notes due June 2031
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument		137,983
Fair Value | Term Loan | 7.5% Term Loan due September 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	33,377	35,669
Fair Value | 6.07% Senior Secured Notes due March 2030 | Senior Secured Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	78,311
Fair Value | 3.04% Senior Secured Notes due June 2031 | Senior Secured Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	129,101
Fair Value | Customer financing receivables
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Customer financing receivables	$ 36,273	$ 38,334