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Earnings Per Share - Schedule of Computations of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Numerator: |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ 1,704 | $ 9,109 | $ 4,921 | $ (1,456) | $ 10,321 | $ 7,148 | $ 3,883 | $ 2,374 | $ 14,278 | $ 23,726 | $ (18,760)
Change in the value of Private Placement Warrants |  |  |  |  |  |  |  |  | (9,299) | (6,169) | 28,031
Net income Attributable to Parent |  |  |  |  |  |  |  |  | $ 4,979 | $ 17,557 | $ (18,760)
Earnings (loss) per share of common stock - basic and diluted : |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) per share of common stock - basic | $ 0.16 | $ 0.84 | $ 0.46 | $ (0.13) | $ 0.96 | $ 0.66 | $ 0.37 | $ 0.23 |  |  |
Earnings (loss) per share of common stock - diluted | $ 0.04 | $ 0.03 | $ 0.18 | $ (0.13) | $ 0.48 | $ 0.56 | $ 0.34 | $ 0.19 |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Denominator: |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding-basic |  |  |  |  |  |  |  |  | 10,808,005 | 10,706,780 | 9,779,457
Incremental shares from assumed exercise of Private Placement Warrants, SAR, restricted stock |  |  |  |  |  |  |  |  | 265,642 | 424,837 |
Weighted average common shares outstanding-diluted |  |  |  |  |  |  |  |  | 11,073,647 | 11,131,617 | 9,779,457
Earnings (loss) per share of common stock - basic and diluted : |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) per share of common stock - basic |  |  |  |  |  |  |  |  | $ 1.32 | $ 2.22 | $ (1.92)
Earnings (loss) per share of common stock - diluted |  |  |  |  |  |  |  |  | $ 0.45 | $ 1.58 | $ (1.92)

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