Organization and Summary of Significant Accounting Policies, Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	$ (1,874)	$ (1,501)
Current-period other comprehensive loss	(154)	(373)	197
Balance, end of period	(2,028)	(1,874)	(1,501)
Foreign Currency Translation Losses [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	(1,858)	(1,501)
Current-period other comprehensive loss	(117)	(357)
Balance, end of period	(1,975)	(1,858)
Unrealized Losses on Investments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period	(16)	0
Current-period other comprehensive loss	(37)	(16)
Balance, end of period	$ (53)	$ (16)