Net Income (Loss) Per Share - Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator:
Net loss available to common stockholders	$ (770)	$ (1,142)	$ (2,011)	$ (12,004)
Denominator:
Weighted average shares outstanding - basic	46,160	41,225	45,975	39,165
Potential common shares - options (treasury stock method)	0	0	0	0
Weighted average shares outstanding - diluted	46,160	41,225	45,975	39,165
Shares excluded (anti-dilutive)	1	2	113	13
Shares excluded due to an exercise price greater than weighted average stock price for the period	2,038	1,596	1,520	1,536
Net loss per common share:
Basic	$ (0.02)	$ (0.03)	$ (0.04)	$ (0.31)
Diluted	$ (0.02)	$ (0.03)	$ (0.04)	$ (0.31)