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Stockholders' Equity - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
shares
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
shares
Jun. 30, 2014
USD ($)
Apr. 28, 2015
Director
Apr. 30, 2007
shares
Limited Partners' Capital Account [Line Items]            
Total fair value of other stock awards vested $ 1,701   $ 1,713      
Employee Stock Purchase Plan [Member]            
Limited Partners' Capital Account [Line Items]            
Stock-based compensation expense 21 $ 38 22 $ 40    
Stock Options [Member]            
Limited Partners' Capital Account [Line Items]            
Stock-based compensation expense 160 105 317 215    
Unrecognized stock-based compensation expense 772   $ 772      
Unrecognized stock-based compensation expense, weighted average period     1 year 1 month 6 days      
Restricted Stock and Restricted Stock Unit [Member]            
Limited Partners' Capital Account [Line Items]            
Stock-based compensation expense 594 $ 410 $ 1,080 $ 858    
Unrecognized stock-based compensation expense $ 3,256   $ 3,256      
Unrecognized stock-based compensation expense, weighted average period     2 years 1 month 6 days      
Non-Employee Director [Member] | Restricted Stock Awards [Member]            
Limited Partners' Capital Account [Line Items]            
Options vesting period     3 years      
JCP Group [Member]            
Limited Partners' Capital Account [Line Items]            
Number of nominees for Board of Directors | Director         3  
Minimum [Member] | 2006 Stock Incentive Plan [Member]            
Limited Partners' Capital Account [Line Items]            
Options vesting period     1 year      
Maximum [Member] | 2006 Stock Incentive Plan [Member]            
Limited Partners' Capital Account [Line Items]            
Options vesting period     4 years      
Options granted period     10 years      
Class A Common Stock [Member] | 2006 Stock Incentive Plan [Member]            
Limited Partners' Capital Account [Line Items]            
Common stock, issued shares | shares           2,475,000
Number of shares available for future grant | shares 1,110,000   1,110,000      
Class A Common Stock [Member] | JCP Group [Member]            
Limited Partners' Capital Account [Line Items]            
JCP Group ownership percentage of Company stock         5.00%