Intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 300	$ 300
Finite-Lived Intangible Assets, Gross	14,870		$ 15,759
Finite-Lived Intangible Assets, Accumulated Amortization	(3,594)		(3,424)
Finite-Lived Intangible Assets, Net	11,276		12,335
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	7,890		8,422
Finite-Lived Intangible Assets, Accumulated Amortization	(2,067)		(2,020)
Finite-Lived Intangible Assets, Net	5,823		6,402
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	6,980		7,337
Finite-Lived Intangible Assets, Accumulated Amortization	(1,527)		(1,404)
Finite-Lived Intangible Assets, Net	$ 5,453		$ 5,933