Business Segment and Geographic Area Information - Geographic Area Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	$ 20,091	$ 19,543	$ 40,730	$ 37,037
Long-Lived Assets	6,505	7,002	6,505	7,002
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	18,987	17,997	38,574	34,583
Long-Lived Assets	6,505	7,002	6,505	7,002
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	543	545	949	1,080
Long-Lived Assets	0	0	0	0
Middle East [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	0	0	3	0
Long-Lived Assets	0	0	0	0
Rest of the World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	561	1,001	1,204	1,374
Long-Lived Assets	$ 0	$ 0	$ 0	$ 0