Organization and Significant Accounting Policies - Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ 37
Other comprehensive income (loss), net of tax	(485)		429		(773)
Balance, end of period	(448)		37
Foreign currency translation
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	18		(420)
Other comprehensive income (loss), net of tax	(489)	[1]	438	[1]
Balance, end of period	(471)		18
Available-for-sale marketable securities
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	19		28
Other comprehensive income (loss), before tax	4	[2]	(14)	[2]
Deferred income taxes	0	[2]	5	[2]
Other comprehensive income (loss), net of tax	4		(9)
Balance, end of period	$ 23		$ 19

[1] In all periods presented, there were no tax impacts related to rate changes and no amounts were reclassified to earnings.

[2] In all periods presented, there were no realized holding gains or losses and therefore no amounts were reclassified to earnings.