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Stockholders' Equity - Summary of stock options (Details) (USD $)
 12 Months Ended
Feb. 28, 2013
Feb. 29, 2012
Shares    
Outstanding at beginning of period (in shares) 1,318,460 1,361,268
Exercisable at beginning of period (in shares) 1,204,660 1,104,293
Granted (in shares) 1,105,718 7,500
Exercised (in shares) (47,566) (13,933)
Cancelled (in shares) (1,053,894) (36,375)
Outstanding at end of period (in shares) 1,069,218 1,318,460
Exercisable at end of period (in shares) 549,425 1,204,660
Weighted Average Exercise Price    
Outstanding at beginning of period (in dollars per share) $ 1.1 $ 1.11
Exercisable at beginning of period (in dollars per share) $ 1.11 $ 1.23
Fair value vested at beginning of period (in dollars per share) $ 0.36 $ 0.34
Granted (in dollars per share) $ 0.6 $ 1.23
Exercised (in dollars per share) $ (0.79) $ (0.72)
Cancelled (in dollars per share) $ (0.93) $ (1)
Outstanding at end of period (in dollars per share) $ 0.67 $ 1.1
Exercisable at end of period (in dollars per share) $ 0.77 $ 1.11
Fair value vested at end of period (in dollars per share) $ 0.39 $ 0.36