Loss Per Share - Reconciliation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net loss	$ (3,533)	$ (2,143)
Less: preferred stock dividends	12	18
Net loss attributable to common stockholders	$ (3,545)	$ (2,161)
Weighted-average number of shares of common stock for basic and diluted net loss per share (in shares)	35,611	35,442
Basic and diluted net loss per share (in dollars per share)	$ (0.10)	$ (0.06)