Annual report pursuant to Section 13 and 15(d)

Note 8 - Income Taxes (Details Textual)

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Note 8 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Operating Loss Carryforwards, Total $ 38,100  
Deferred Tax Assets, Operating Loss Carryforwards, Total 9,400  
Net Operating Loss Carryforwards Limitation on Use 1,800  
Remaining Preownership Net Operating Loss Carryforwards 4,700  
Unrecognized Tax Benefits, Ending Balance $ 0 $ 0
Minimum [Member]    
Operating Loss Carryforwards Expiration Periods 5 years  
Maximum [Member]    
Operating Loss Carryforwards Expiration Periods 20 years  
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards, Total $ 1,400  
Operating Loss Carryforwards with Indefinite Life 300  
Domestic Tax Authority [Member]    
Deferred Tax Assets, Operating Loss Carryforwards, Total 7,991 $ 8,025
Operating Loss Carryforwards with a Definite Life 34,700  
Operating Loss Carryforwards with Indefinite Life $ 3,400