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Note 2 - Business (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 6 Months Ended
Jul. 01, 2020
Apr. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Proceeds from Issuance of Long-term Debt, Total     $ 1,975 $ 0
Subsequent Event [Member]        
Percentage of Staff Laid Off 36.00%      
Covid 19 [Member]        
Cash Rent Payments Deferred in Connection With COVID-19     $ 41  
Covid 19 [Member] | Subsequent Event [Member]        
Percentage of Staff Laid Off 36.00%      
Paycheck Protection Program CARES Act [Member]        
Proceeds from Issuance of Long-term Debt, Total   $ 2,000