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Summary of Stock Option Activity (Detail) (USD $)
 6 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]      
Outstanding at beginning of period, Shares 591,672 320,842 580,004
Granted, Shares 35,000 205,000  
Exercised, Shares (33,334)    
Forfeited, Shares (13,334) (14,168)  
Outstanding at end of period, Shares 580,004 511,674  
Exercisable at end of period, Shares 250,976 244,591  
Outstanding at beginning of period, weighted average exercise price $ 2.48 $ 2.71  
Granted, weighted average exercise price $ 1.73 $ 2.04  
Exercised, weighted average exercise price $ 1.50    
Forfeited, weighted average exercise price $ 7.74 $ 2.43  
Outstanding at end of period, weighted average exercise price $ 2.37 $ 2.65  
Exercisable at end of period, weighted average exercise price $ 2.96 $ 3.32  
Weighted-average fair value per Option granted during the period $ 1.25 $ 1.16