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Income Taxes - Summary of Company's Deferred Tax Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Net operating loss carryforwards $ 15,478 $ 13,267
Unearned revenue 2 11
Stock-based compensation 3,881 3,384
Accrued payroll and benefits 236 224
Research and development credits 16 0
Fixed asset basis difference 84 90
Inventory reserve 491 568
Lease liability 1,622 565
Common stock warrant assets 0 988
Contingent Consideration 531 0
Charitable contributions 3 2
Total deferred tax assets 22,344 19,099
Deferred tax liabilities:    
Right of use asset (1,548) (526)
Amortizable intangibles (98) 0
Income from Partnerships (13) 0
Other (174) 0
Total deferred tax liabilities (1,833) (526)
Less valuation allowance (20,511) (18,573)
Net deferred tax assets $ 0 $ 0