Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Approximate Deferred Tax (Detail)

v3.21.1
Income Taxes - Components of Approximate Deferred Tax (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Net operating loss carryforwards $ 27,300 $ 26,317
Accruals and reserves 1,212 1,544
Stock based compensation 87 75
Research and development tax credits 1,780 1,800
Derivative warrant liability 17 17
Interest deduction carryforward 1,500 1,470
Investment in joint venture 0 161
Intangible assets 114 0
Other 6 6
Total deferred tax assets 32,016 31,390
Less valuation allowance (31,921) (30,497)
Net deferred tax assets 95 893
Deferred tax liabilities    
Fixed assets (95) (132)
Goodwill and intangible assets 0 (761)
Net deferred taxes $ 0 $ 0