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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)