Annual report pursuant to Section 13 and 15(d)

Settlement With Former Director - Additional Information (Detail)

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Settlement With Former Director - Additional Information (Detail) (Director, USD $)
 1 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Dec. 25, 2011
Director
      
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]      
Settlement paid   $ 175,000  
Special dividend   53,000  
Settlement Period   June 16, 2011  
Repurchase of shares 30,209    
Put option exercise price per share $ 14.48    
Fair value, common stock subject to put option including settlement expense 426,000   426,000
Settlement expense 70,000    
Fair value, common stock subject to put option 356,000    
Fair value, common stock subject to put option $ 11.78    
Fair value of redemption value     432,000
Fair value of redemption value, accrued     $ 6,000