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Income taxes (Details - Deferred tax assets) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred tax liabilities attributable to: |  |
Accumulated depreciation and amortization | $ (3,394) | $ (3,401)
Unrealized gains | (472) | (473)
Total deferred tax liabilities | (3,866) | (3,874)
Deferred tax assets attributable to: |  |
Net operating losses | 6 | 6
Accrued compensation | 287 | 170
Incentive compensation | 194 | 164
Inventory | 328 | 324
Allowances for doubtful accounts and discounts | 5 | 5
Deferred revenue | 0 | 10
Other | 17 | (6)
Total net deferred tax assets | 837 | 673
Net deferred tax liabilities | $ (3,029) | $ (3,201)

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