Income Taxes - Net deferred tax assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carryforwards	$ 25,124	$ 11,214
Research and development tax credit carryforwards	3,237	1,236
Intangible assets	761	432
Salaries and wages		313
Stock compensation	430	80
Other	137	76
Total deferred tax assets	29,689	13,351
Deferred tax liabilities:
Property and equipment	(261)	(111)
Prepaid expenses	(485)
Total deferred tax liabilities	(746)	(111)
Valuation allowance	(28,943)	(13,240)
Net deferred tax assets