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Stockholders' Equity - Additional Information (Detail)
3 Months Ended 9 Months Ended
Mar. 31, 2013
Mar. 31, 2013
Equity [Abstract]    
Stock issued upon exercise of warrants 657,000 3,777,000
Stock issued upon exercise of options 957,000 1,500,000
Repurchase of Company stock, shares   2,000,000
Stock repurchase program, number of shares authorized to be repurchased 5,000,000 5,000,000