Comprehensive Income (Loss) (Schedule of Accumulated Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of period	$ (1,690)	$ (1,409)
Decrease related to adoption of ASU 2016-01		(44)
Other comprehensive income (loss) before reclassifications	284	(234)
Reclassifications from accumulated other comprehensive loss	0	(3)
Other comprehensive income (loss), net of tax	284	(237)
Balance at the end of period	(1,406)	(1,690)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of period	(1,649)	(1,394)
Decrease related to adoption of ASU 2016-01		0
Other comprehensive income (loss) before reclassifications	174	(255)
Reclassifications from accumulated other comprehensive loss	0	0
Other comprehensive income (loss), net of tax	174	(255)
Balance at the end of period	(1,475)	(1,649)
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of period	(41)	(15)
Decrease related to adoption of ASU 2016-01		(44)
Other comprehensive income (loss) before reclassifications	110	21
Reclassifications from accumulated other comprehensive loss	0	(3)
Other comprehensive income (loss), net of tax	110	18
Balance at the end of period	$ 69	$ (41)