Income Taxes - Tax provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Taxes
Domestic loss	$ (35,600)	$ (42,100)
Foreign loss	(6,300)	(6,300)
Deferred:
Deferred income tax provision	$ 0	$ 0
Effective tax rate, differed from the federal statutory rate
Statutory rate	(21.00%)	(21.00%)
State taxes	(2.00%)	(1.80%)
Intercompany transactions	1.00%	0.20%
Valuation allowance	20.70%	18.30%
Nondeductible warrant expense		(0.30%)
Book loss on debt extinguishment	(1.90%)	1.00%
Foreign rate differential	(1.80%)	(0.70%)
Other	4.90%	4.30%
Effective tax rate	0.00%	0.00%
Non-current deferred tax assets:
Net operating losses	$ 51,853	$ 24,773
Tax credits	241	241
Stock compensation	559	3,042
Other	4,981	1,006
Gross non-current deferred tax assets	57,634	29,062
Valuation allowance	(56,222)	(28,454)
Net non-current deferred tax assets	1,412	608
Non-current deferred tax liabilities:
Other	(1,431)	(566)
Property and equipment	19	(42)
Net non-current deferred tax liability	(1,412)	$ (608)
Increase in valuation allowance	$ 27,400