Net Income (Loss) Per Share - Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator:
Net loss available to common stockholders	$ (1,231)	$ (5,695)	$ (1,241)	$ (10,862)
Denominator:
Weighted average shares outstanding - basic	46,257	38,518	45,881	38,118
Potential common shares - options (treasury stock method)	0	0	0	0
Weighted average shares outstanding - diluted	46,257	38,518	45,881	38,118
Shares excluded (anti-dilutive)	134	11	164	86
Shares excluded due to an exercise price greater than weighted average stock price for the period	1,534	2,090	1,489	1,347
Net loss per common share:
Basic	$ (0.03)	$ (0.15)	$ (0.03)	$ (0.28)
Diluted	$ (0.03)	$ (0.15)	$ (0.03)	$ (0.28)