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Note 7 - Income Taxes: Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Details |  |  |
Deferred Tax Assets, Inventory | $ 84 | $ 60 | $ 56
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts | 33 | 18 | 16
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities | 55 | 62 | 89
Deferred Tax Assets, Other | 0 | 0 | 4
Deferred Tax Liabilities Depreciation and Amortization | (2,933) | (3,216) | (3,789)
Unrealized investment loss | 0 | 0 | 66
Deferred Tax Liabilities, Net | $ (2,761) | $ (3,076) | $ (3,558)

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