Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details)

v3.21.1
Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]    
Accrued expenses $ 148 $ 107
Stock-based compensation 2,591 2,436
Lease liability 935 945
Other (823) (856)
Net operating loss carryforwards 70,936 58,073
Research and development credits 5,291 5,984
Total deferred tax assets 79,078 66,689
Valuation allowances (79,078) (66,689)
Net deferred tax assets $ 0 $ 0