Reconciliation of Net Income (Loss) Per Share - Summary of Reconciliation of Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Net income (Loss)									$ 7,942	$ (7,431)	$ 8,217
Weighted average shares outstanding	27,241	27,159	27,024	26,869	26,840	26,839	19,215	18,996	27,016	21,181	17,887
Effect of dilutive stock options	180	163	163			328	367	384	138		366
Diluted shares outstanding	27,421	27,322	27,187	26,869	26,840	27,167	19,582	19,380	27,154	21,181	18,253
Basic net income (loss) per share	$ 0.11	$ 0.15	$ 0.08	$ (0.05)	$ (0.93)	$ 0.17	$ 0.36	$ 0.32	$ 0.29	$ (0.35)	$ 0.46
Diluted net income (loss) per share	$ 0.11	$ 0.15	$ 0.07	$ (0.05)	$ (0.93)	$ 0.17	$ 0.36	$ 0.31	$ 0.29	$ (0.35)	$ 0.45