Statement of Changes in Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Options Granted to Non-Employee (Member) Common Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Comprehensive Income [Member] USD ($)	Total USD ($)
Balance at Dec. 31, 2010			$ 14,185	$ (9,445)	$ (413)	$ 4,327
Balance (in Shares) at Dec. 31, 2010		6,698,968
Stock compensation related to options granted to Telkoor's employees			32			32
Stock compensation related to options granted to employees			103			103
Exercise of options granted to employees			38			38
Exercise of options granted to employees (in Shares)		150,686
Comprehensive income:
Net income (loss)				1,124		1,124	1,124
Unrealized loss on available for sale securities					(473)	(473)	(473)
Foreign currency translation adjustments					(18)	(18)	(18)
Balance at Dec. 31, 2011			14,358	(8,321)	(904)	5,133	5,133
Balance (in Shares) at Dec. 31, 2011		6,649,954
Stock compensation related to options granted to Telkoor's employees			(10)			(10)
Stock compensation related to options granted to employees			142			142
Exercise of options granted to employees (in Shares)	6,283	7,213
Purchase of treasury stock			(14)			(14)
Purchase of treasury stock (in Shares)		(9,989)
Comprehensive income:
Net income (loss)				(329)		(329)	(329)
Unrealized loss on available for sale securities					473	473	473
Foreign currency translation adjustments					132	132	132
Balance at Dec. 31, 2012			$ 14,476	$ (8,650)	$ (299)	$ 5,527	$ 5,527
Balance (in Shares) at Dec. 31, 2012		6,853,161