Note 5 - Leases - Maturities of Lease Liabilities (Details) - USD ($)	Mar. 31, 2019	Mar. 31, 2018
April 2019 – March 2020	$ 583,776
April 2019 – March 2020	6,769
April 2020 – March 2021	547,133
April 2020 – March 2021
April 2021 – March 2022	363,370
April 2021 – March 2022
April 2022 – March 2023	344,238
April 2022 – March 2023
April 2023 – March 2024	332,280
April 2023 – March 2024
Thereafter	137,204
Thereafter
Total payment under lease agreements	2,308,001
Total payment under lease agreements	6,769
Less inputed interest	(344,145)
Less inputed interest	(178)
Operating Lease, Liability, Total	1,963,856
Total finance lease liabilities	$ 6,651	$ 13,789