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Note 6 - Borrowings From Officer (Details Textual) - Revolving Credit Facility [Member] - Chief Executive Officer [Member] - USD ($)
Feb. 07, 2019
Oct. 24, 2019
Sep. 30, 2019
Feb. 08, 2018
Line of Credit Facility, Maximum Borrowing Capacity $ 2,700,000 $ 0   $ 3,700,000
Long-term Line of Credit, Total     $ 0  
Prime Rate [Member]        
Debt Instrument, Basis Spread on Variable Rate 1.00%