Consolidated Condensed Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net loss	$ (361)	$ (406)	$ (894)	$ (2,183)
Foreign currency translation adjustments	963	503	(331)	664
Unrealized gain (loss) on investments	4,903	(1,940)	(3,501)	(6,352)
Other comprehensive income (loss)	5,866	(1,437)	(3,832)	(5,688)
Comprehensive income (loss)	$ 5,505	$ (1,843)	$ (4,726)	$ (7,871)