Comprehensive Income (Loss) (The Effect Of The Reclassifications From Comprehensive Income (Loss) To Earnings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Interest income and other	$ (104)	$ 35
Cost of revenues	3,774	6,045
Research and development expenses	1,836	1,917
Selling, general and administrative expenses	3,127	3,226
Income (loss) before income taxes	(2,128)	127
Income tax benefit	(18)	(35)
Net income (loss)	(2,146)	92
Amount Reclassified from Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) On Foreign Exchange Forward Contracts [Member]
Cost of revenues	25	(52)
Research and development expenses	5	(13)
Selling, general and administrative expenses	3	(10)
Income (loss) before income taxes	33	(75)
Income tax benefit		26
Net income (loss)	33	(49)
Amount Reclassified from Accumulated Other Comprehensive Income [Member] | Unrealized Losses On Available-for-sale Securities [Member]
Interest income and other	(23)
Net income (loss)	$ (23)