Note 9 - Leases - Operating Lease (Details)	3 Months Ended
Jun. 30, 2022 USD ($)
Operating lease cost	$ 42,515
Variable lease cost	31,190
Total	73,705
Operating cash flows for leases	$ 44,433
Remaining lease term (Month)	45 months
Discount rate	3.50%

Amount of lease cost recognized by lessee for lease contract.

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Discount rate used by lessee to determine present value of operating lease payments.

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Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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