Note 10 - Fair Value Measurements (Details) - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation - Fair Value, Inputs, Level 3 [Member]	9 Months Ended
	Dec. 31, 2016 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	$ 1,136,203
Gains and losses for the period (realized and unrealized)	(288,203)
Purchases, issuances, sales and settlements, net	(720,000)
Transfers in or out of Level 3	0
Balance at the end of period	128,000
Warrant [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	1,136,203
Gains and losses for the period (realized and unrealized)	(288,203)
Purchases, issuances, sales and settlements, net	(720,000)
Transfers in or out of Level 3	0
Balance at the end of period	$ 128,000