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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% |

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