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Income Taxes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Components of loss before income taxes      
U.S. $ (79,710) $ (99,749) $ (58,431)
Foreign (1,287) (772) (939)
Loss before income taxes (80,997) (100,521) (59,370)
Current:      
State 62 92 47
Total current 62 92 47
Deferred:      
Federal 876 (318) 78
State 1,754 (197) 95
Total deferred 2,630 (515) 173
Total expense $ 2,692 $ (423) $ 220
Federal income tax rate 21.00% 21.00% 21.00%
Reconciliation of the income tax provision      
Computed expected tax (benefit) $ (17,009) $ (21,110) $ (12,468)
Nondeductible expenses 2,892 1,062 4,218
Tax rate differential on foreign earnings 270 162 197
Joint ventures 2,297 1,035 441
Amazon warrants 10,114 5,381 1,134
Tax credits (7,208) (6,250) (6,065)
Other 1,447 (48) 843
Change in valuation allowance 9,889 19,345 11,920
Total expense 2,692 (423) 220
Tax benefit related to exclusion of AFTC 7,200 6,200 $ 5,800
Deferred tax assets:      
Accrued expenses 6,915 6,178  
Lease obligations 25,993 25,574  
Alternative minimum tax and general business credits 7,011 7,011  
Stock option expense 11,280 11,756  
Amazon warrants 18,271 20,002  
Other 7,455 6,096  
Depreciation and amortization 4,404 4,270  
Loss carryforwards 161,931 152,310  
Total deferred tax assets 243,260 233,197  
Less valuation allowance (211,709) (202,242)  
Net deferred tax assets 31,551 30,955  
Deferred tax liabilities:      
Right-of-use assets (24,196) (24,650)  
Commodity swap contracts (706) (741)  
Goodwill (3,473) (3,160)  
Investments in joint ventures and partnerships (6,391) (2,989)  
Total deferred tax liabilities (34,766) (31,540)  
Net deferred tax liabilities $ (3,215) $ (585)