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Note 7 - Income Taxes: Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Details |  |  |
Deferred Tax Assets, Inventory | $ 86 | $ 84 | $ 60
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts | 32 | 33 | 18
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities | 68 | 55 | 62
Deferred Tax Liabilities Depreciation and Amortization | (3,034) | (2,933) | (3,216)
Deferred Tax Liabilities, Net | $ (2,848) | $ (2,761) | $ (3,076)

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