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Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			$ 13,078,000
Ending balance	$ 17,375,000		17,375,000
Amounts reclassified from accumulated other comprehensive loss	0	$ 0	0	$ 0
AOCI
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(3,780,000)	(3,820,000)	(3,597,000)	(3,787,000)
Ending balance	(4,115,000)	(3,687,000)	(4,115,000)	(3,687,000)
Foreign Currency Translation
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss) due to foreign currency translation, net of tax	$ (335,000)	$ 133,000	$ (518,000)	$ 100,000

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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