Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 14,059,000	$ 13,078,000
Ending balance	15,637,000	16,884,000
Amounts reclassified from accumulated other comprehensive loss	0	0
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(4,214,000)	(3,597,000)
Ending balance	(4,303,000)	(3,780,000)
Foreign Currency Translation
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive loss due to foreign currency translation, net of tax	$ (89,000)	$ (183,000)