Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 66	$ 53	$ 177	$ 191
Proceeds from issuance of common stock	0	2	3	2
Unrecognized stock-based compensation expense	$ 179	$ 96	$ 179	$ 96
Weighted average period unrecognized expense is expected to be recognized			9 months 18 days	7 months 6 days