Significant Stock-Based Plan Activity and Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Stock-Based Compensation Expense [Abstract]
Total Stock-based compensation expense	$ 197	$ 289	$ 554	$ 309
Unrecognized stock-based compensation expense	2,600		$ 2,600
Weighted average remaining vesting period			2 years 3 months
Selling, general and administrative expense
Stock-Based Compensation Expense [Abstract]
Total Stock-based compensation expense	180	269	$ 518	275
Cost of sales
Stock-Based Compensation Expense [Abstract]
Total Stock-based compensation expense	$ 17	$ 20	$ 36	$ 34