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Note 3 - Debt (Details Textual) - VeraBank [Member] - Revolving Credit Facility [Member] - USD ($)
Dec. 12, 2019
Mar. 31, 2019
Line of Credit Facility, Maximum Borrowing Capacity   $ 5,000,000
Long-term Line of Credit, Total $ 0  
Proceeds from Lines of Credit, Total $ 0