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Note 10 - Related Party Transactions (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Matt Mahmood [Member]    
Related Party Transaction, Expenses from Transactions with Related Party $ 0 $ 50
William Murray [Member]    
Related Party Transaction, Expenses from Transactions with Related Party   $ 68
Subsidiary of Common Parent [Member]    
Nature of Common Ownership or Management Control Relationships 90%  
Related Party Transaction, Amounts of Transaction $ 131