Significant Stock-Based Plan Activity and Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Stock-Based Compensation Expense [Abstract]
Total Stock-based compensation expense	$ 391	$ 333	$ 945	$ 642
Unrecognized stock-based compensation expense	2,300		$ 2,300
Weighted average remaining vesting period			2 years 1 month 6 days
Selling, general and administrative expense
Stock-Based Compensation Expense [Abstract]
Total Stock-based compensation expense	341	320	$ 859	595
Cost of sales
Stock-Based Compensation Expense [Abstract]
Total Stock-based compensation expense	$ 50	$ 13	$ 86	$ 47