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Note 10 - Fair Value Measurements (Details) - USD ($)
6 Months Ended
Sep. 30, 2016
Mar. 31, 2016
Note 10 - Fair Value Measurements (Details) [Line Items]    
Derivative Liability, Noncurrent $ 165,000 $ 1,136,203
Warrants Held by BCA [Member]    
Note 10 - Fair Value Measurements (Details) [Line Items]    
Class of Warrant or Right, Exercised (in Shares) 236,920  
Class of Warrant or Rights, Fair Value $ 720,000  
Derivative Liability, Noncurrent   938,203
Warrants Held by Outside Investor [Member]    
Note 10 - Fair Value Measurements (Details) [Line Items]    
Derivative Liability, Noncurrent 165,000 $ 198,000
Warrants and Rights Outstanding $ 50,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) $ 3.35