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Net Income Per Share (Details) (USD $)
 3 Months Ended 9 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Numerator        
Net income available to common shareholders $ 2,228,467 $ 1,299,525 $ 5,010,114 $ 3,575,158
Denominator        
Weighted average number of common shares - Basic 28,201,106 27,816,963 28,069,285 27,759,487
Effect of dilutive securities:        
Common stock warrants issued in connection with equity and financing transactions (in shares) 898 66,826 864 62,684
Stock Options and Incentive Warrants (in shares) 3,888,148 3,901,395 3,841,659 3,735,981
Total weighted average dilutive securities (in shares) 3,889,046 3,968,221 3,842,523 3,798,665
Weighted average number of common shares and dilutive potential common shares used in diluted EPS 32,090,152 31,785,184 31,911,808 31,558,152
Net income per common share - Basic (in dollars per share) $ 0.08 $ 0.05 $ 0.18 $ 0.13
Net income per common share - Diluted (in dollars per share) $ 0.07 $ 0.04 $ 0.16 $ 0.11