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Note 9 - Debt (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 10, 2020
Apr. 30, 2020
Jun. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Proceeds from Lines of Credit, Total       $ 2,800
Proceeds from Paycheck Protection Program Under CARES Act   $ 2,829      
M&T [Member] | Revolving Credit Facility [Member]          
Line of Credit Facility, Maximum Borrowing Capacity $ 7,500        
Line of Credit Facility, Current Borrowing Capacity       $ 7,500  
Debt Instrument, Interest Rate, Stated Percentage 2.00%        
Proceeds from Lines of Credit, Total     $ 2,800    
M&T [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument, Basis Spread on Variable Rate 2.50%