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Note 9 - Fair Value Measurements (Details) - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation - Fair Value, Inputs, Level 3 [Member]
6 Months Ended
Sep. 30, 2015
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance at beginning of period $ 518,962
Gains and losses for the period (realized and unrealized) 450,828
Purchases, issuances, sales and settlements, net 0
Transfers in or out of Level 3 0
Balance at the end of period 969.790
Warrant [Member]  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance at beginning of period 518,962
Gains and losses for the period (realized and unrealized) 450,828
Purchases, issuances, sales and settlements, net 0
Transfers in or out of Level 3 0
Balance at the end of period $ 969,790