The Company and Significant Accounting Policies - Reconciliation of Basic and Diluted Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share Basic And Diluted [Abstract]
Net income	$ 2,270	$ 5,284
Denominator:
Weighted average common shares outstanding, basic	88,897,456	87,531,375
Basic earnings per share:
Net income per share, basic	$ 0.03	$ 0.06
Net income	$ 2,270	$ 5,284
Denominator:
Weighted average common shares outstanding, basic	88,897,456	87,531,375
Dilutive securities:
Stock options and restricted stock units	2,034,653	2,554,586
Weighted average common shares outstanding, diluted	90,932,109	90,085,961
Diluted earnings per share:
Net income per share, diluted	$ 0.02	$ 0.06