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Intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 300	$ 200
Finite-Lived Intangible Assets, Gross	15,445		$ 15,204
Finite-Lived Intangible Assets, Accumulated Amortization	(2,429)		(2,092)
Finite-Lived Intangible Assets, Net	13,016		13,112
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	8,234		8,090
Finite-Lived Intangible Assets, Accumulated Amortization	(1,592)		(1,447)
Finite-Lived Intangible Assets, Net	6,642		6,643
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	7,211		7,114
Finite-Lived Intangible Assets, Accumulated Amortization	(837)		(645)
Finite-Lived Intangible Assets, Net	$ 6,374		$ 6,469

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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