Net Income (Loss) Per Share - Net Income (Loss) Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Numerator:
Net loss available to common stockholders	$ (10)	$ (5,167)
Denominator:
Weighted average shares outstanding - basic	45,501	37,714
Potential common shares - options (treasury stock method)	0	0
Weighted average shares outstanding - diluted	45,501	37,714
Shares excluded (anti-dilutive)	229	186
Shares excluded due to an exercise price greater than weighted average stock price for the period	976	1,340
Net loss per common share:
Basic	$ 0.00	$ (0.14)
Diluted	$ 0.00	$ (0.14)