Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning	364,000	367,000
Options cancelled and retired	(170,250)
Options exercised	(18,750)	(3,000)
Options granted	15,000
Outstanding at ending	190,000	364,000
Options vested and exercisable and expected to be vested and exercisable	190,000
Options vested and exercisable at ending	43,750
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning	$ 12.05	$ 12.00
Options cancelled and retired	12.67
Options exercised	8.30	8.86
Granted	9.61
Outstanding at ending	11.25	$ 12.05
Options vested and exercisable and expected to be vested and exercisable	11.25
Options vested and exercisable at ending	$ 11.39
Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted-Average Remaining Term [Roll Forward]
Outstanding at beginning	7 years 4 months 24 days	8 years 3 months 18 days
Outstanding at ending		7 years 4 months 24 days
Options vested and exercisable and expected to be vested and exercisable	6 years 10 months 24 days
Options vested and exercisable at ending	6 years 8 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Intrinsic value [Roll Forward]
Outstanding at beginning	$ 420	$ 1,109
Outstanding at ending		$ 420
Options vested and exercisable and expected to be vested and exercisable	169
Options vested and exercisable at ending	$ 39