Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			$ 18,064,000
Ending balance	$ 12,149,000		12,149,000
Amounts reclassified from accumulated other comprehensive loss	0	$ 0	0	$ 0
AOCI
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(3,687,000)	(3,625,000)	(3,787,000)	(3,908,000)
Ending balance	(3,556,000)	(3,809,000)	(3,556,000)	(3,809,000)
Foreign Currency Translation
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss) due to foreign currency translation, net of tax	$ 131,000	$ (184,000)	$ 231,000	$ 99,000