Note 9 - Operating Leases (Details Textual) - USD ($)			1 Months Ended	3 Months Ended	9 Months Ended
	May 08, 2019	Nov. 05, 2018	May 31, 2019	Dec. 31, 2019	Dec. 31, 2019	Apr. 01, 2019	Mar. 31, 2019
Operating Lease, Right-of-Use Asset				$ 170,526	$ 170,526	$ 207,359
Lessee, Operating Lease, Discount Rate						25.00%
Operating Lease, Payments					36,593
Operating Lease, Liability, Total				170,766	170,766
Operating Lease, Liability, Current				61,886	61,886
Operating Lease, Liability, Noncurrent				108,880	108,880
Operating Sublease, Monthly Rental Payments	$ 4,100	$ 5,700
Sublease Income			$ 1,800
Other Nonoperating Income (Expense) [Member]
Sublease Income				$ 12,300	$ 33,600