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Note 18 - Income Taxes - Federal and State Income Tax Provisions (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Current      
Federal $ 0 $ 0 $ 0
State 0 5 6
Other 0 0 0
Total current tax expense 0 5 6
Deferred      
Federal 0 0 0
State 0 0 0
Other 0 0 0
Total deferred tax expense 0 0 0
Income tax provision $ (0) $ 5 $ 6