Income Taxes - Schedule of deferred tax assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Net operating losses	$ 54,300	$ 46,339
Capitalized Research and Experimental Expenditures	27,568	0
Operating lease liability	21,443	9,290
R&D and investment tax credits	11,519	9,560
Deferred revenue	8,457	15,053
Stock-based compensation	6,296	3,675
Unrealized gain/loss	1,090	195
Capitalized start-up costs	699	875
Other	354	426
Total gross deferred tax assets	131,726	85,413
Deferred tax liabilities:
Right-of-use asset	(19,868)	(9,242)
Fixed assets	(1,738)	(725)
Less: valuation allowance	(110,120)	(75,446)
Net deferred taxes	$ 0	$ 0