Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at balance sheet date			$ (306)	$ (550)
Other comprehensive income (loss) before reclassifications			300	(680)
Amounts reclassified from accumulated other comprehensive loss			(17)	0
Total changes in other comprehensive loss	274	(81)	283	(680)
Balance at balance sheet date	(23)	(1,230)	(23)	(1,230)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at balance sheet date			(325)	(746)
Other comprehensive income (loss) before reclassifications			353	(521)
Amounts reclassified from accumulated other comprehensive loss			0	0
Total changes in other comprehensive loss			353	(521)
Balance at balance sheet date	28	(1,267)	28	(1,267)
Unrealized Holding Gains on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at balance sheet date			42	196
Other comprehensive income (loss) before reclassifications			55	(159)
Amounts reclassified from accumulated other comprehensive loss			0	0
Total changes in other comprehensive loss			55	(159)
Balance at balance sheet date	97	37	97	37
Unrealized Losses on Foreign Currency Forward Contracts
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at balance sheet date			(23)	0
Other comprehensive income (loss) before reclassifications			(108)	0
Amounts reclassified from accumulated other comprehensive loss			(17)	0
Total changes in other comprehensive loss			(125)	0
Balance at balance sheet date	$ (148)	$ 0	$ (148)	$ 0