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Income Taxes - Summary of Deferred Tax Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]    
Net operating loss carryforwards $ 5,087 $ 8,442
Net research and development expenditures 7,478 4,195
Share issuance costs 4,506 78
Net federal investment tax credits 3,181 1,877
U.S. research and development tax credits 961  
Tax basis of property and equipment in excess of carrying values (86) (204)
Operating lease right-of-use assets (1,240) (279)
Operating lease liability 1,063 287
Accrued expense and other liabilities 345 161
Deferred revenue 15,372  
Share-based compensation 103  
Total deferred tax assets 36,770 14,557
Valuation allowance (35,358) (14,425)
Net deferred tax assets $ 1,412 $ 132