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NOTE 12 - INCOME TAXES (Details 3) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred income tax assets: |  |
Allowance for doubtful accounts | $ 10 | $ 13
Inventory and product return reserves | 573 | 464
Compensation accruals | 1,973 | 1,723
Accrued liabilities | 179 | 129
Book-over-tax depreciation and amortization | 91 | 25
Foreign net operating loss carryforwards | 53 | 3
U.S. net operating loss carryforwards | 3,739 | 2,904
U.S. credit carryforwards | 2,345 | 2,280
Deferred tax assets, gross | 8,963 | 7,541
Valuation allowance | (8,963) | (7,541)
Total deferred income tax assets | $ 0 | $ 0

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