Income Taxes - Deferred tax assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets
Net operating loss carryforwards	$ 55,091	$ 47,737
Research and development credits	623	623
Lease liability	387
Accrued expenses and other	4,425	1,356
Inventory reserve	372	171
Gross deferred tax asset	60,898	49,887
Deferred tax liabilities
Depreciation and amortization	(435)	(89)
Right of use asset	(302)
Gross deferred tax liability	(737)	(89)
Net deferred tax asset before valuation allowance	60,161	49,798
Valuation allowance	(60,161)	(49,798)
Net deferred tax asset	$ 0	$ 0