Borrowings - Narrative (Details) - USD ($)		3 Months Ended		4 Months Ended
	Jul. 29, 2022	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2023	Dec. 31, 2023	Jan. 31, 2023	Jan. 18, 2023	Sep. 30, 2022	Sep. 30, 2021	Jul. 06, 2021
Debt Instrument [Line Items]
Interest payable		$ 2,892,000			$ 0
Common stock, par value (in dollars per share)		$ 0.0001			$ 0.0001
Carrying Value		$ 205,630,000			$ 203,859,000
Long-term debt, current		3,458,000			3,332,000
Proceeds from issuance of convertible notes - related party		0	$ 33,350,000
Loss on debt extinguishment		0	1,634,000
Change in fair value of derivatives - related parties		534,000	(12,934,000)
Related Party
Debt Instrument [Line Items]
Change in fair value of derivatives - related parties		534,000	(12,934,000)
2021 Convertible Note Payable | Related Party
Debt Instrument [Line Items]
Interest payable		1,737,000			0
2021 Convertible Note Payable | Convertible Notes
Debt Instrument [Line Items]
Principal										$ 100,000,000
Embedded conversion feature		46,000			78,000
Carrying Value		96,033,000			$ 94,386,000
Non-cash interest expense - related party		$ 3,416,000	2,961,000
Coupon Interest Rate		40.00%			40.00%
Amortization of debt discount		$ 1,531,000	1,207,000
AFG Convertible Notes Payable | Related Party
Debt Instrument [Line Items]
Interest payable		$ 1,155,000			$ 0
Carrying Value							$ 16,623,000
Non-cash interest expense - related party			2,873,000
AFG Convertible Notes Payable | Convertible Notes
Debt Instrument [Line Items]
Common stock, par value (in dollars per share)							$ 0.0001
Conversion price per unit (in dollars per share)							$ 1.67
Coupon Interest Rate		40.00%			40.00%
AFG Convertible Notes Payable | Convertible Notes | Related Party
Debt Instrument [Line Items]
Principal						$ 13,750,000	$ 13,750,000
Paid-in-kind interest rate		26.50%				26.50%
Embedded conversion feature		$ 3,843,000			$ 4,345,000
Carrying Value		17,917,000			18,139,000
Non-cash interest expense - related party		1,435,000	969,000
Amortization of debt discount		218,000	148,000
Senior Secured Term Loan
Debt Instrument [Line Items]
Carrying Value		86,756,000			85,624,000
Senior Secured Term Loan | SOFR | Minimum
Debt Instrument [Line Items]
Variable rate spread	0.2616%
Senior Secured Term Loan | NYFRB | Minimum
Debt Instrument [Line Items]
Variable rate spread	0.50%
Senior Secured Term Loan | Secured Debt
Debt Instrument [Line Items]
Principal	$ 100,000,000
Carrying Value		86,756,000			85,624,000
Number of days prior to current maturity date	91 days
Minimum prepayment amount	$ 500,000,000
Repayment applicable treasury rate	0.50%
Interest escrowed for loan		$ 11,858,000			11,755,000
Senior Secured Term Loan | SOFR Loans
Debt Instrument [Line Items]
Variable rate spread	8.50%
Coupon Interest Rate		14.11%
Senior Secured Term Loan | ABR Loans
Debt Instrument [Line Items]
Stated interest rate	7.50%
Equipment financing facility
Debt Instrument [Line Items]
Carrying Value		$ 4,924,000			5,710,000
Non-cash interest expense - related party		208,000	317,000
Long-term line of credit		4,924,000			5,710,000
Long-term debt, current		3,458,000			3,332,000
Equipment financing facility | Line of Credit
Debt Instrument [Line Items]
Carrying Value		$ 4,924,000			$ 5,710,000
Coupon Interest Rate								16.20%	14.30%
Maximum borrowing capacity									$ 25,000,000
Yorkville Convertible Promissory Note | Convertible Notes | Related Party
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes - related party				$ 22,000,000
Amortization of debt discount			$ 6,952,000
Converted instrument, shares issued (in shares)			11,216,492
Embedded Derivatives - Yorkville Convertible Promissory Notes | Convertible Notes
Debt Instrument [Line Items]
Change in fair value of derivatives - related parties			$ 55,000