Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 92,925	$ 173,631	$ 90,596	$ 182,596
Current period other comprehensive income (loss) before reclassifications	353	(18)	(22)	91
Amounts reclassified from accumulated other comprehensive loss		(42)		(108)
Net other comprehensive income (loss) during period	353	(60)	(22)	(17)
Ending balance	89,116	94,916	89,116	94,916
Unrealized (Loss) Gain on Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0	9	0	(6)
Current period other comprehensive income (loss) before reclassifications	0	3	0	19
Amounts reclassified from accumulated other comprehensive loss		(12)		(13)
Net other comprehensive income (loss) during period	0	(9)	0	6
Ending balance	0	0	0	0
Gain (Loss) on Derivative Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0	123	0	223
Current period other comprehensive income (loss) before reclassifications	0	(93)	0	(128)
Amounts reclassified from accumulated other comprehensive loss		(30)		(95)
Net other comprehensive income (loss) during period	0	(123)	0	(223)
Ending balance	0	0	0	0
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,312)	(998)	(937)	(1,126)
Current period other comprehensive income (loss) before reclassifications	353	72	(22)	200
Amounts reclassified from accumulated other comprehensive loss		0		0
Net other comprehensive income (loss) during period	353	72	(22)	200
Ending balance	(959)	(926)	(959)	(926)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,312)	(866)	(937)	(909)
Ending balance	$ (959)	$ (926)	$ (959)	$ (926)