Schedule of Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Technology acquired	$ 1,150	$ 1,150
Customer relationships	200	200
Covenant-not-to-compete	200	200
Backlog	200	200
Gross value	1,750	1,750
Accumulated amortization	(1,547)	(1,412)
Carrying value	203	338
Trademarks and trade names	500	500
Foreign currency translation	(119)
Trademarks and trade names	381	500
Total intangible assets, net	584	838
Electronic Devices [Member]
Technology acquired
Customer relationships
Covenant-not-to-compete	200	200
Backlog	200	200
Gross value	400	400
Accumulated amortization	(400)	(400)
Carrying value
Trademarks and trade names	500	500
Foreign currency translation	(119)
Trademarks and trade names	381	500
Total intangible assets, net	381	500
Communications Equipment [Member]
Technology acquired	1,150	1,150
Customer relationships	200	200
Covenant-not-to-compete
Backlog
Gross value	1,350	1,350
Accumulated amortization	(1,147)	(1,012)
Carrying value	203	338
Trademarks and trade names
Foreign currency translation
Trademarks and trade names
Total intangible assets, net	$ 203	$ 338