Net Loss Per Share - Reconciliation of Net Loss and Weighted Average Shares used in Computing Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Basic net loss per share:
Net loss applicable to common shares	$ (2,687)	$ (763)
Weighted average common shares outstanding	12,971	11,790
Basic net loss per share of common stock	$ (0.21)	$ (0.06)
Diluted net loss per share:
Net loss applicable to common shares	$ (2,687)	$ (763)
Weighted average common shares outstanding	12,971	11,790
Dilutive effects of stock options	0	0
Weighted average common shares, assuming dilutive effect of stock options	12,971	11,790
Diluted net loss per share of common stock	$ (0.21)	$ (0.06)