Note 7 - Leases - Operating Lease (Details)	12 Months Ended
Mar. 31, 2020 USD ($)
Operating lease cost	$ 154,565
Variable lease cost	96,798
Total	251,363
Operating cash flows for leases	$ 174,528
Remaining lease term (Year)	6 years
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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