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Net Income Per Share - Schedule of Basic and Diluted Earnings (Loss) Per Share (Details) (USD $)
 3 Months Ended 12 Months Ended
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Numerator                      
Net income attributable to common shareholders $ 1,441,469 $ 755,125 [1] $ (577,459) [2] $ 1,303,876 $ 944,012 [3] $ 2,228,467 $ 1,790,696 $ 990,951 $ 2,923,011 $ 5,954,126 $ 4,501,739
Denominator                      
Weighted average number of common shares—Basic                 30,895,832 28,205,467 27,784,298
Effect of dilutive securities:                      
Common stock warrants issued in connection with equity and financing transactions                 0 878 63,319
Stock Options and Incentive Warrants                 1,668,235 3,768,786 3,762,312
Total weighted average dilutive securities                 1,668,235 3,769,664 3,825,631
Weighted average number of common shares and dilutive potential common shares used in diluted EPS                 32,564,067 31,975,131 31,609,929
Net income (loss) per common share - Basic (in dollars per share) $ 0.04 $ 0.02 [1] $ (0.02) [2] $ 0.05 $ 0.03 [3] $ 0.08 $ 0.06 $ 0.04 $ 0.09 $ 0.21 $ 0.16
Net income (loss) per common share - Diluted (in dollars per share) $ 0.04 $ 0.02 [1] $ (0.02) [2] $ 0.04 $ 0.03 [3] $ 0.07 $ 0.06 $ 0.03 $ 0.09 $ 0.19 $ 0.14
[1] Includes $608,000 of non-recurring expenses related to the retirement of an officer of the Company.
[2] Reflects a $1.3 million restructuring charge and $0.8 million of non-recurring expenses primarily associated with the exercise of 4.0 million of 4.8 million of previously outstanding stock options and warrants.
[3] The tax provision for fiscal 2013 reflects a higher effective tax rate compared to the estimated annual effective rate at March 31, 2013. The March effective rate included the favorable effect depletion in excess of basis and was based on the Company's estimate of taxable ordinary income at that time. In contrast to the March forecast, actual taxable income for fiscal 2013 was lower due to a taxable loss on the sale of assets in June 2013 and lower than expected book income due to $0.6 million of lower Delhi Field revenue and $0.4 million of higher general and administrative expense, primarily attributable to an increase in accrued bonus, shelf registration costs and an engineering study.