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Stock Incentive Plans - Additional Information (Detail) (USD $)
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12 Months Ended | 12 Months Ended | 48 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | ||||||||||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2013
Restricted Stock
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Dec. 31, 2012
Restricted Stock
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Dec. 31, 2011
Restricted Stock
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Dec. 31, 2013
Restricted Stock
Service Based Options
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Dec. 31, 2013
Restricted Stock
Service Based Options
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Dec. 31, 2013
Restricted Stock
Minimum
Service Based Options
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Dec. 31, 2013
Restricted Stock
Maximum
Service Based Options
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Aug. 31, 2012
Previously Approved Plans
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Dec. 31, 2013
Previously Approved Plans
Non Vested Stock Options
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Dec. 31, 2012
Previously Approved Plans
Non Vested Stock Options
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Aug. 31, 2012
2012 Equity Incentive Plan
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Dec. 31, 2013
2012 Equity Incentive Plan
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Dec. 31, 2013
2012 Equity Incentive Plan
Restricted Stock
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Dec. 31, 2013
2012 Plan and Previously Approved Plans
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Dec. 31, 2013
2012 Plan and Previously Approved Plans
Restricted Stock
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||
| Shares initially authorized for issuance under equity incentive plan | 300,000 | |||||||||||||||||
| Additional shares authorized for issuance under equity incentive plan | 17,666 | |||||||||||||||||
| Shares ceased to be issuable | 17,666 | |||||||||||||||||
| Outstanding options to purchase shares of common stock | 279,000 | 433,000 | 546,001 | 279,000 | ||||||||||||||
| Unvested restricted shares outstanding | 318,660 | 312,501 | 232,501 | 206,997 | 206,997 | 111,663 | 318,660 | |||||||||||
| Outstanding shares remained available for future grants | 355,367 | |||||||||||||||||
| Aggregate pre-tax intrinsic value | $ 75,000 | $ 3,000 | ||||||||||||||||
| Weighted average fair value of options granted | $ 2.77 | $ 1.28 | ||||||||||||||||
| Unrecognized compensation cost related to the nonvested options | 330,500 | 292,500 | 292,500 | 7,000 | 3,000 | |||||||||||||
| Unrecognized compensation costs are expected to be recognized over a weighted average period (years) | 2 years 10 months 24 days | 2 years 2 months 12 days | 2 months 12 days | 2 months 12 days | ||||||||||||||
| Share based compensation common stock granted | 167,500 | 147,500 | 439,000 | 167,500 | ||||||||||||||
| Vesting period | 3 years | 4 years | ||||||||||||||||
| Vested | 105,504 | 58,500 | 223,003 | |||||||||||||||
| Aggregate intrinsic value | 365,000 | 677,000 | 677,000 | |||||||||||||||
| Share-base compensation expense | $ 302,000 | $ 456,000 | $ 440,000 | $ 0 | ||||||||||||||