Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 14,227,000	$ 17,375,000	$ 14,059,000	$ 13,078,000
Ending balance	12,398,000	14,999,000	12,398,000	14,999,000
Amounts reclassified from accumulated other comprehensive loss	0	0
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(4,229,000)	(4,115,000)	(4,214,000)	(3,597,000)
Ending balance	(4,450,000)	(3,977,000)	(4,450,000)	(3,977,000)
Foreign Currency Translation
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss) due to foreign currency translation, net of tax	$ (221,000)	$ 138,000	$ (236,000)	$ (380,000)