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Unaudited Supplementary Quarterly Financial Information - Unaudited Supplementary Quarterly Financial Information (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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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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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Total revenue | $ 26,781 | $ 25,399 | $ 27,900 | $ 23,476 | $ 24,248 | $ 24,165 | $ 27,187 | $ 25,281 | $ 103,556 | $ 100,881 | $ 102,443 |
| Gross profit | 10,734 | 9,657 | 10,041 | 7,140 | 8,442 | 8,812 | 9,460 | 8,565 | 37,572 | 35,279 | 38,697 |
| Net (loss) income | $ 32,411 | $ 1,772 | $ 1,414 | $ (889) | $ 345 | $ 793 | $ 134 | $ 175 | $ 34,708 | $ 1,447 | $ 344 |
| Basic (loss) income per share | $ 2.99 | $ 0.17 | $ 0.13 | $ (0.08) | $ 0.03 | $ 0.07 | $ 0.01 | $ 0.02 | $ 3.21 | $ 0.13 | $ 0.03 |
| Diluted (loss) income per share | $ 2.55 | $ 0.14 | $ 0.12 | $ (0.08) | $ 0.03 | $ 0.07 | $ 0.01 | $ 0.02 | $ 2.88 | $ 0.13 | $ 0.03 |