Organization Basis Of Presentation and Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components of accumulated balances for each component of other comprehensive income (loss)
Unrealized Gain (Loss) on Available-for-Sale Securities, Beginning Balance	$ 19	$ 395	$ (134)
Foreign Currency Translation, Beginning Balance	(731)	(430)	(486)
Accumulated Other Comprehensive Income (Loss), Beginning Balance	(712)	(35)	(620)
Unrealized Gain (Loss) on Available-for-Sale Securities, Change during year	10	(376)	529
Foreign Currency Translation, Change during year	(173)	(301)	56
Accumulated Other Comprehensive Income (Loss), Change during year	(163)	(677)	585
Unrealized Gain (Loss) on Available-for-Sale Securities, Ending Balance	29	19	395
Foreign Currency Translation, Ending Balance	(904)	(731)	(430)
Accumulated Other Comprehensive Income (Loss), Ending Balance	$ (875)	$ (712)	$ (35)