Operating Segments - Summary of Net Sales by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Total Net sales	$ 31,898	$ 34,047
Electronic Devices [Member]
Total Net sales	21,717	24,036
Electronic Devices [Member] | United States [Member]
Total Net sales
Electronic Devices [Member] | United Kingdom [Member]
Total Net sales	21,717	24,036
Electronic Devices [Member] | France [Member]
Total Net sales
Communications Equipment [Member]
Total Net sales	10,181	10,011
Communications Equipment [Member] | United States [Member]
Total Net sales	1,465	1,712
Communications Equipment [Member] | United Kingdom [Member]
Total Net sales
Communications Equipment [Member] | France [Member]
Total Net sales	$ 8,716	$ 8,299