Income Taxes - Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carry forward	$ 120,544	$ 62,346
Tax credits	6,296	3,975
Accruals and reserves	0	3,323
Stock-based compensation expense	6,944	267
Lease liability (ASC 842)	2,622	0
Accrued expenses	0	0
Inventory reserves	617	0
Other	15	2
Total deferred tax assets	137,038	69,913
Valuation allowance	(130,569)	(69,222)
Total deferred tax asset	6,469	691
Depreciation and amortization	1,185	691
Deferred Tax Liabilities, Prepaid Expenses	2,983	0
Deferred Tax Liabilities, Leasing Arrangements	2,301	0
Deferred tax liabilities:
Total deferred tax liabilities	6,469	691
Net deferred tax assets (liabilities)	$ 0	$ 0