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Note 13 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($)
$ in Thousands
1 Months Ended
Apr. 16, 2020
Apr. 10, 2020
May 13, 2020
Proceeds from Paycheck Protection Program Under CARES Act $ 2,829    
Revolving Credit Facility [Member] | M&T [Member]      
Line of Credit Facility, Maximum Borrowing Capacity   $ 7,500  
Proceeds from Lines of Credit, Total     $ 2,800
Revolving Credit Facility [Member] | M&T [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument, Basis Spread on Variable Rate   2.50%  
Debt Instrument, Covenant, Interest Rate in Excess of Applicable Non-default Interest Rate   2.00%