Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ (6,711)	$ 4,357
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	376	(37)
Unrealized gains (losses) on available-for-sale securities:
Unrealized gains (losses) on available-for-sale securities for the period	(79)	30
Reclassification adjustment for other-than-temporary impairment loss included in net income (loss)	42
Reclassification adjustment for gains included in net income (loss)	(8)
Total unrealized gains (losses) on available-for-sale securities	(45)	30
Unrealized gains (losses) on foreign exchange forward contracts:
Unrealized gains (losses) on foreign exchange forward contracts for the period	591	(468)
Reclassification adjustment for (gains) losses included in net income (loss)	74	(29)
Total unrealized gains (losses) on foreign exchange forward contracts	665	(497)
Other comprehensive income (loss), before tax	996	(504)
Income tax provision (benefit) related to items of other comprehensive income (loss)	227	(164)
Other comprehensive income (loss), net of tax	769	(340)
Total comprehensive income (loss)	$ (5,942)	$ 4,017