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Note 8 - Income Taxes - Deferred Taxes (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Net operating losses | $ 69,537 | $ 64,418
Fixed asset basis difference | 4,599 | 4,566
Contributions carryover | 48 | 38
Deferred compensation | 695 | 497
Accrued liabilities and other | 358 | 333
Total deferred tax assets | 75,237 | 69,852
Valuation allowance for deferred tax assets | (75,237) | (69,852)
Net deferred tax asset | $ 0 | $ 0

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