Business Segments and Geographic Area Information - Geographic Area Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	$ 86,386	$ 78,649
Long-Lived Assets	6,431	6,838
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	81,393	76,589
Long-Lived Assets	6,431	6,838
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	2,567	687
Long-Lived Assets	0	0
Middle East [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	3	0
Long-Lived Assets	0	0
Rest of the World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	2,423	1,373
Long-Lived Assets	$ 0	$ 0