Description of Business and Summary of Significant Accounting Policies (Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive (loss) income at beginning of period	$ (371)	$ (286)	$ (158)	$ (199)
Total accumulated other comprehensive loss at end of period	(96)	(154)	(96)	(154)
Unrealized Gains (Losses) on Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive (loss) income at beginning of period	37	29	100	(37)
Other comprehensive income (loss) before reclassifications	174	17	92	83
Amounts reclassified from accumulated other comprehensive (loss) income to other income (expense)			19
Total accumulated other comprehensive loss at end of period	211	46	211	46
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive (loss) income at beginning of period	(408)	(315)	(258)	(162)
Other comprehensive income (loss) before reclassifications	109	85	(113)	(140)
Amounts reclassified from accumulated other comprehensive (loss) income to other income (expense)	(8)	30	64	102
Total accumulated other comprehensive loss at end of period	$ (307)	$ (200)	$ (307)	$ (200)