Note 10 - Fair Value Measurements (Details) - Schedule of Warrants Exercised - Warrants Held by BCA [Member]	6 Months Ended
	Sep. 30, 2016 $ / shares shares
Class of Warrant or Right [Line Items]
Warrant, Number of Warrants Exercised	236,920
Warrant Issued 09-10-2010 [Member] | Warrant [Member]
Class of Warrant or Right [Line Items]
Warrant, Expiration Date	Sep. 10, 2019
Warrant, Number of Warrants Exercised	136,920
Warrant, Exercise Price | $ / shares	$ 6.70
Warrant Issued 07-26-2012 #2 [Member] | Warrant [Member]
Class of Warrant or Right [Line Items]
Warrant, Expiration Date	Sep. 10, 2019
Warrant, Number of Warrants Exercised	20,000
Warrant, Exercise Price | $ / shares	$ 3.35
Warrant Issued 11-20-2012 [Member] | Warrant [Member]
Class of Warrant or Right [Line Items]
Warrant, Expiration Date	Sep. 10, 2019
Warrant, Number of Warrants Exercised	20,000
Warrant, Exercise Price | $ / shares	$ 3.56
Warrant Issued 02-14-2013 [Member] | Warrant [Member]
Class of Warrant or Right [Line Items]
Warrant, Expiration Date	Sep. 10, 2019
Warrant, Number of Warrants Exercised	20,000
Warrant, Exercise Price | $ / shares	$ 3.58
Warrant Issued 07-12-2013 [Member] | Warrant [Member]
Class of Warrant or Right [Line Items]
Warrant, Expiration Date	Sep. 10, 2019
Warrant, Number of Warrants Exercised	20,000
Warrant, Exercise Price | $ / shares	$ 3.33
Warrant Issued 08-12-2013 [Member] | Warrant [Member]
Class of Warrant or Right [Line Items]
Warrant, Expiration Date	Sep. 10, 2019
Warrant, Number of Warrants Exercised	20,000
Warrant, Exercise Price | $ / shares	$ 3.69