Comprehensive Income (Loss) (The Effect Of The Reclassifications From Comprehensive Income (Loss) To Earnings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012
Interest income and other													$ (188)	$ (24)
Cost of revenues													(18,658)	(23,465)
Research and development expenses													(7,519)	(7,748)
Selling, general and administrative expenses													(12,345)	(12,802)
Loss before income taxes													(6,354)	(3,135)
Income tax provision (benefit)													(186)	3,576
Net loss	(2,048)	(774)	(1,200)	(2,146)	(6,499)	[1]	(447)	[1]	143	[1]	92	[1]	(6,168)	(6,711)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Net loss													(53)	(49)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Losses On Foreign Exchange Forward Contracts [Member]
Cost of revenues													(16)	(57)
Research and development expenses													(20)	(12)
Selling, general and administrative expenses													(17)	(5)
Loss before income taxes													(53)	(74)
Income tax provision (benefit)														(25)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) On Available-for-sale Securities [Member]
Interest income and other													(21)	8
Income tax provision (benefit)														1
Net loss													$ (21)	$ 7

[1] Includes a $5.7 million non-cash charge in the fourth quarter of 2012 to record a valuation allowance against our deferred tax assets