Note 11 - PPP Loan (Details Textual) - USD ($)		6 Months Ended
Apr. 30, 2020	Jun. 30, 2020	Jun. 30, 2019
Proceeds from Issuance of Long-term Debt, Total		$ 629,000
Paycheck Protection Program CARES Act [Member]
Proceeds from Issuance of Long-term Debt, Total	$ 629,000
Notes Payable, Total		630,000
Interest Payable		$ 1,000

Amount of interest payable on debt, including, but not limited to, trade payables.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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