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Note 7 - Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Allowance for uncollectable accounts | $ 85 | $ 79
Inventories reserve | 531 | 348
Accrued vacation | 115 | 112
Accrued bonus | 57 | 171
Stock-based compensation and equity appreciation rights | 78 | 62
Lease Accounting ASC 842 Lease Liability | 1,405 | 1,230
Section 481(a) adjustment | 798 | 716
Net operating loss carryforwards | 82 | 97
Tax credit carryforwards | 165 | 171
Unrealized Foreign Currency Gain | 42 |
Other | 5 | 7
Total | 3,363 | 2,993
Valuation allowance | (1,504) | (1,403)
Deferred tax assets | 1,859 | 1,590
Accumulated Other Comprehensive Income | (61) |
Lease Accounting ASC 842 Lease Asset | (1,386) | (1,158)
Property and equipment | (412) | (432)
Deferred tax liabilities | (1,859) | (1,590)
Net deferred tax assets |  |

X
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