Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Net Accumulated Deferred Income Tax Assets (Liabilities) (Detail)

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Income Taxes - Components of Net Accumulated Deferred Income Tax Assets (Liabilities) (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Deferred tax assets (liabilities):    
Stock-based compensation $ 1,305 $ 933
Depreciation and amortization (825) (571)
Section 181 qualified production expense (4,668) (3,312)
Net operating loss carryforward 21,212 15,999
Charitable carryforward 156 231
Other 542 508
Tax credits 276 276
Valuation allowance (18,204) (14,228)
Total deferred tax liabilities, net of valuation allowance $ (206) $ (164)