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Net Loss Per Share - Summary of Net Loss Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ 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
Earnings Per Share [Abstract]                      
Net loss                 $ (14,746) $ (3,561) $ (61,555)
Basic and diluted weighted average common shares outstanding                 24,439,845 18,080,615 18,032,131
Basic and diluted loss per common share $ 0.13 $ 0.18 $ (1.29) $ 0.02 $ 0.01 $ (0.05) $ (0.09) $ (0.07) $ (0.60) $ (0.20) $ (3.42)