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Note 12 - Subsequent Events (Details Textual) - USD ($)			1 Months Ended		3 Months Ended
Note 12 - Subsequent Events (Details Textual) - USD ($)	Apr. 08, 2022	Apr. 04, 2022	May 12, 2022	Apr. 30, 2022	Mar. 31, 2022	Mar. 31, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)					130,000
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)					$ 2.00
Share-Based Payment Arrangement, Expense					$ 32,900	$ 6,400
Subsequent Event [Member] \| Financing Arrangement Related to Furniture for New Office Facilities [Member]
Debt Instrument, Face Amount				$ 1,100,000
Debt Instrument, Periodic Payment, Interest				$ 496,000
Subsequent Event [Member] \| Share-Based Payment Arrangement, Employee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		250,700
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)		$ 2.00
Subsequent Event [Member] \| Share-Based Payment Arrangement, Employee [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		4 years
Subsequent Event [Member] \| Share-Based Payment Arrangement, Employee [Member] \| Share-Based Payment Arrangement, Option [Member] \| Vesting Each Year [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage		25.00%
Subsequent Event [Member] \| Share-Based Payment Arrangement, Employee [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)	3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	348,100
Share-Based Payment Arrangement, Expense			$ 700,000