Net Income (Loss) Per Share - Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net loss available to common stockholders	$ (3,706)	$ (10)
Denominator:
Weighted average shares outstanding - basic	46,094	45,501
Potential common shares - options (treasury stock method)	0	0
Weighted average shares outstanding - diluted	46,094	45,501
Shares excluded (anti-dilutive)		229
Shares excluded due to an exercise price greater than weighted average stock price for the period	1,605	976
Net loss per common share:
Basic	$ (0.08)	$ 0.00
Diluted	$ (0.08)	$ 0.00