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Stockholders' Equity - Activity under 2005 Stock Incentive Plan (Detail) (USD $)
 12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2011
Options Outstanding      
Options Granted 338,550 720,300 280,450
Balance, ending 2,271,309    
Weighted Average Price      
Options Granted $ 4.05 $ 3.21 $ 1.21
Balance, ending $ 2.72    
2005 Stock Incentive Plan
      
Shares Available for Grant      
Balance, beginning 793,905 99,051 192,517
Options Granted (338,550) (380,300) (165,450)
Options Forfeited / Expired 151,273 75,154 71,984
Balance, ending 606,628 793,905 99,051
Shares Authorized for Issuance   1,000,000  
Options Outstanding      
Balance, beginning 1,499,761 1,249,328 1,266,643
Options Granted 338,550 380,300 165,450
Options Exercised (321,778) (54,713) (110,781)
Options Forfeited / Expired (151,273) (75,154) (71,984)
Balance, ending 1,365,260 1,499,761 1,249,328
Shares Authorized for Issuance       
Weighted Average Price      
Balance, beginning $ 1.96 $ 0.96 $ 0.82
Options Granted $ 6.48 $ 5.53 $ 1.89
Options Exercised $ 1.03 $ 0.95 $ 0.75
Options Forfeited / Expired $ 4.13 $ 4.04 $ 1.03
Balance, ending $ 3.06 $ 1.96 $ 0.96