Borrowings - Narrative (Details)				1 Months Ended		2 Months Ended	3 Months Ended			9 Months Ended		21 Months Ended
	Jul. 29, 2022 USD ($)	Jun. 13, 2022 USD ($) $ / shares	Apr. 09, 2021 USD ($)	May 31, 2022 USD ($)	May 31, 2021 USD ($)	Aug. 31, 2022 notice $ / shares shares	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jul. 06, 2021 USD ($)
Debt Instrument [Line Items]
Payment made for debt issuance cost										$ 12,703,000	$ 4,369,000
Outstanding balance							$ 103,980,000			103,980,000		$ 103,980,000	$ 6,389,000
Interest payable - related party							1,590,000			1,590,000		1,590,000	0
Proceeds received from the Term Loan, net of discount										92,783,000	0
Received from credit agreement										4,216,000	7,000,000
Long-term debt, current							2,822,000			2,822,000		2,822,000	1,644,000
Note payable, current							0			0		0	4,926,000
Note payable, excluding current							0			0		0	13,769,000
Loss on debt extinguishment							(942,000)		$ 1,273,000	(942,000)	1,273,000
Hi-Power
Debt Instrument [Line Items]
Aggregate purchase price			$ 25,000,000
Business acquisition, net of cash acquired				$ 5,000,000	$ 5,000,000
Loss on debt extinguishment							942,000
Yorkville Convertible Promissory Note
Debt Instrument [Line Items]
Conversion price per unit (in dollars per share) | $ / shares						$ 2.21
Converted instrument, shares issued (in shares) | shares						3,393,663
Yorkville Convertible Promissory Note | Convertible Notes
Debt Instrument [Line Items]
Principal		$ 7,500,000
Discount rate percentage		2.00%
Conversion price per unit (in dollars per share) | $ / shares		$ 2.21
Payment made for debt issuance cost		$ 125,000
Interest expense							201,000			309,000
Number Of Investor Notices | notice						6
Converted instrument, shares issued (in shares) | shares						3,393,663
Conversion price per share (in usd per share) | $ / shares						$ 2.21
Outstanding balance							0			0		0
2021 Convertible Notes
Debt Instrument [Line Items]
Interest accretion and amortization of debt issuance costs								$ 3,087,000
Interest payable - related party							1,590,000			1,590,000		1,590,000	0
2021 Convertible Notes | Convertible Notes
Debt Instrument [Line Items]
Principal														$ 100,000,000
Outstanding balance							105,987,000			105,987,000		105,987,000	102,900,000
Embedded conversion feature							1,076,000			1,076,000		$ 1,076,000	$ 12,359,000
Gain (loss) on beneficial conversion feature							$ (369,000)		9,927,000	$ 11,304,000	9,927,000
Annual effective interest rates in excess							25.00%			25.00%		25.00%	19.00%
Interest accretion and amortization of debt issuance costs - related party							$ 2,759,000		3,611,000	$ 7,490,000	3,611,000
Term Loan Agreement | SOFR | Minimum
Debt Instrument [Line Items]
Variable rate spread	0.2616%
Term Loan Agreement | NYFRB | Minimum
Debt Instrument [Line Items]
Variable rate spread	0.50%
Term Loan Agreement | Secured Debt
Debt Instrument [Line Items]
Outstanding balance							94,681,000			$ 94,681,000		$ 94,681,000	$ 0
Proceeds received from the Term Loan, net of discount							$ 94,681,000
Number of days prior to current maturity date	91 days
Minimum prepayment amount	$ 500,000,000
Annual effective interest rates in excess							19.20%			19.20%		19.20%
Debt issuance costs	12,607,000
Debt issuance costs, Gross	1,898,000
Insurance premiums amount	11,724,000
Accrued insurance policy premiums	$ 5,231,000
Number of Immediately following interest payments required to be escrowed	4
Interest escrowed for loan							$ 10,731,000			$ 10,731,000		$ 10,731,000
Maximum borrowing capacity under agreement	$ 15,000,000
Interest accretion and amortization of debt issuance costs - related party							$ 2,409,000			$ 2,409,000
Term Loan Agreement | Secured Debt | First Anniversary
Debt Instrument [Line Items]
Additional premium percentage to be paid	3.00%
Term Loan Agreement | Secured Debt | Second Anniversary
Debt Instrument [Line Items]
Additional premium percentage to be paid	3.00%
Term Loan Agreement | Secured Debt | Third Anniversary
Debt Instrument [Line Items]
Additional premium percentage to be paid	2.00%
Term Loan Agreement | SOFR Loans
Debt Instrument [Line Items]
Variable rate spread	8.50%
Annual effective interest rates in excess							11.30%			11.30%		11.30%
Term Loan Agreement | ABR Loans
Debt Instrument [Line Items]
Debt instruments, coupon rate	7.50%
Equipment financing facility
Debt Instrument [Line Items]
Remaining borrowing capacity							$ 13,784,000			$ 13,784,000		$ 13,784,000
Long-term line of credit							84,775,000			84,775,000		84,775,000	6,371,000
Long-term debt, current							2,822,000			2,822,000		2,822,000	1,644,000
Interest accretion and amortization of debt issuance costs - related party							190,000		$ 0	615,000	$ 0
Equipment financing facility | Line of Credit
Debt Instrument [Line Items]
Outstanding balance							$ 9,299,000			$ 9,299,000		$ 9,299,000	6,389,000
Annual effective interest rates in excess							16.20%		14.30%	16.20%	14.30%	16.20%
Debt issuance costs							$ 96,000		$ 175,000	$ 96,000	$ 175,000	$ 96,000
Maximum borrowing capacity							25,000,000			25,000,000		25,000,000
Received from credit agreement							4,216,000			4,216,000	7,000,000	$ 11,216,000
Commitment fee amount											$ 188,000
Hi-Power Purchase Agreement | Notes Payable
Debt Instrument [Line Items]
Note payable, current													13,769,000
Note payable, excluding current													$ 4,926,000
Loss on debt extinguishment							$ (942,000)			$ (942,000)