Summary of Net Sales by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Total Net sales	$ 34,047	$ 33,531
Electronic Devices [Member]
Total Net sales	24,036	22,022
Electronic Devices [Member] | United States [Member]
Total Net sales
Electronic Devices [Member] | United Kingdom [Member]
Total Net sales	24,036	22,022
Electronic Devices [Member] | France [Member]
Total Net sales
Communications Equipment [Member]
Total Net sales	10,011	11,509
Communications Equipment [Member] | United States [Member]
Total Net sales	1,712	3,077
Communications Equipment [Member] | United Kingdom [Member]
Total Net sales
Communications Equipment [Member] | France [Member]
Total Net sales	$ 8,299	$ 8,432