Operating Segments - Summary of Net Sales by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Total Net sales	$ 35,665	$ 31,898
Electronic Devices [Member]
Total Net sales	24,227	21,717
Electronic Devices [Member] | United States [Member]
Total Net sales
Electronic Devices [Member] | United Kingdom [Member]
Total Net sales	24,227	21,717
Electronic Devices [Member] | France [Member]
Total Net sales
Communications Equipment [Member]
Total Net sales	11,438	10,181
Communications Equipment [Member] | United States [Member]
Total Net sales	1,218	1,465
Communications Equipment [Member] | United Kingdom [Member]
Total Net sales
Communications Equipment [Member] | France [Member]
Total Net sales	$ 10,220	$ 8,716