Note 11 - Fair Value Measurements (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis - USD ($)	Jun. 30, 2019	Mar. 31, 2019
Note 11 - Fair Value Measurements (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total Assets	$ 0	$ 0
Warrant liability	122,000	43,500
Total Liabilities	122,000	43,500
Fair Value, Inputs, Level 1 [Member]
Note 11 - Fair Value Measurements (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total Assets	0	0
Warrant liability	0	0
Total Liabilities	0	0
Fair Value, Inputs, Level 2 [Member]
Note 11 - Fair Value Measurements (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total Assets	0	0
Warrant liability	0	0
Total Liabilities	0	0
Fair Value, Inputs, Level 3 [Member]
Note 11 - Fair Value Measurements (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total Assets	0	0
Warrant liability	122,000	43,500
Total Liabilities	$ 122,000	$ 43,500