Net Income (Loss) Per Share - Calculations of Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Basic:
Net income (loss)	$ (15,452)	$ (14,603)
Weighted average common shares outstanding (in shares)	20,448	20,861
Net income (loss) per share (in dollars per share)	$ (0.76)	$ (0.70)
Diluted:
Net income (loss) attributable to parent, diluted	$ (15,452)	$ (14,603)
Weighted average common shares outstanding (in shares)	20,448	20,861
Net income (loss) per share (in dollars per share)	$ (0.76)	$ (0.70)