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Note 11 - Stockholders' Equity and Stock Plans (Details) - Assumptions Used to Determine Fair Value of Options Granted (USD $)
12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Assumptions Used to Determine Fair Value of Options Granted [Abstract]      
Expected dividend yield 0.00% 0.00% 0.00%
Expected volatility 63.02% 63.34% 64.44%
Risk-free interest rate 1.04% 1.64% 2.36%
Expected life (years) 5 years 135 days 5 years 120 days 5 years 120 days
Weighted average fair value of options granted (in Dollars per share) $ 4.37 $ 1.99 $ 2.99