Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Income Tax Provision (Details)

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INCOME TAXES - Income Tax Provision (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Amount    
Income tax benefit at federal statutory rate $ (3,285) $ (4,746)
State taxes, net of federal effect (761) (1,391)
Other permanent differences (41) 115
Stock-based compensation 236 569
R&D tax credits (30) (242)
Other 1,075 769
Increase in valuation allowance 2,719 4,609
Income tax expense (benefit) $ (87) $ (317)
% of pretax income (loss)    
Income tax benefit at federal statutory rate 21.00% 21.00%
State taxes, net of federal effect 4.90% 6.20%
Other permanent differences 0.00% (0.50%)
Stock-based compensation (1.50%) (2.50%)
R&D tax credits 0.20% 1.10%
Other (6.90%) (3.60%)
Increase in valuation allowance (17.40%) (20.40%)
Income tax expense (benefit) 0.30% 1.30%