Liquidity and Capital Resources (Details) - USD ($) $ / shares in Units, $ in Thousands									1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 05, 2023	Aug. 10, 2023	Aug. 07, 2023	Mar. 13, 2023	Nov. 07, 2022	Jan. 01, 2022	Jan. 21, 2021	Nov. 09, 2020	Aug. 31, 2023	Nov. 30, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Sep. 08, 2023	Mar. 31, 2023	Apr. 30, 2022	Aug. 09, 2020
Net (loss) income											$ (24,103)	$ (60,391)	$ (43,202)	$ 130,558
Gross profit (loss)											1,172	756	2,002	2,107	$ 2,700	$ (800)	$ (17,400)
Accumulated deficit											(852,069)		(852,069)		$ (808,866)
Cash, cash equivalents and marketable securities											$ 125,400		$ 125,400
Common stock, par value per share (in dollars per share)											$ 0.001		$ 0.001		$ 0.001
Issuance of common stock, net of issuance costs												$ 26,439	$ 7,376	$ 34,443
Proceeds from issuance of warrants				$ 15,000
Purchase Warrant
Beneficial ownership by PHC (%)				15.00%
PHC Notes
Interest rate (as a percent)																				8.00%	9.50%
Aggregate principal amount															$ 35,000				$ 35,000		$ 35,000
Common stock, par value per share (in dollars per share)																					$ 0.001
Conversion price																					$ 0.53
2025 Notes.
Interest rate (as a percent)		5.25%
Aggregate principal amount		$ 30,800
Converted debt amount		$ 7,500
Debt converted, Shares issued	35,100,000
Ascensia | PHC Notes
Aggregate principal amount				$ 35,000																	$ 35,000
Energy Capital, LLC
Excess of the purchase price and fair value of option recorded in additional-paid-in-capital					$ 37,600
Energy Capital, LLC | Minimum
Issuance of convertible preferred stock, net of issuance costs							$ 4,000
Energy Capital, LLC | Maximum
Issuance of convertible preferred stock, net of issuance costs							$ 12,000
Share price							$ 0.25
Exchange Warrant
Number of shares of common stock called by warrant				68,525,311
Exercise price of warrant (in dollars per share)				$ 0.001
Purchase Warrant
Number of shares of common stock called by warrant				15,425,750
Exercise price of warrant (in dollars per share)				$ 0.001
Purchase price of warrant (in dollars per share)				$ 0.97
Convertible Preferred Equity
Amount of possible additional debt principal amount																					$ 15,000
Convertible Preferred Equity | Energy Capital, LLC
Issuance of convertible preferred stock, net of issuance costs								$ 12,000
Price per share (in dollars per share)							1,000
Collaboration and commercialization agreement term								24 months
Share price							$ 1,000
Threshold redemption period of temporary equity							6 months
Conversion price							$ 0.3951
Series B Preferred Stock
Issuance of convertible preferred stock, net of issuance costs					12,000
Regular Purchase, Shares Sold						0
Series B Preferred Stock | Energy Capital, LLC
Issuance of convertible preferred stock, net of issuance costs					$ 12,000
Open Market Sale Agreement
Shares issued													9,944,663		15,160,899
Proceeds from issuance of stock													$ 7,400		$ 34,400
Open Market Sale Agreement | Maximum
Issuance of common stock, net of issuance costs										$ 150,000
Percentage of commission on proceeds from common stock										3.00%
Open Market Sale Agreement | Jefferies LLC
Issuance of common stock, net of issuance costs			$ 106,600
Shares issued													9,944,663	15,160,899
Proceeds from issuance of stock													$ 7,400	$ 34,400
Open Market Sale Agreement | Jefferies LLC | Maximum
Issuance of common stock, net of issuance costs										$ 150,000
Percentage of commission on proceeds from common stock										3.00%
Equity Distribution Agreement
Shares issued													0
Equity Distribution Agreement | Goldman Sachs & Co. LLC
Issuance of common stock, net of issuance costs											$ 0
Equity Distribution Agreement | Goldman Sachs & Co. LLC | Maximum
Issuance of common stock, net of issuance costs									$ 106,600
Percentage of commission on proceeds from common stock									3.00%
The Loan Agreement | Hercules | Term Loan Facility | Maximum
Secured debt																		$ 50,000
The Loan Agreement | Hercules | Tranche 1 Loan
Secured debt																		25,000
The Loan Agreement | Hercules | Tranche 2 Loan
Secured debt																		10,000
The Loan Agreement | Hercules | Tranche 3 Loan
Secured debt																		$ 15,000