Segments - Reconciliation of Revenues from Reportable Segments to Consolidated Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Revenues from external customers	$ 23,583	$ 18,299	$ 83,845	$ 73,720
Other revenues, including from other operating segments
Segment Reporting, Asset Reconciling Item [Line Items]
Revenues	2,974	2,196	8,714	10,511
Elimination of intersegment revenues
Segment Reporting, Asset Reconciling Item [Line Items]
Revenues	(2,047)	(2,648)	(7,254)	(8,942)
Total segment revenues from reportable segments
Segment Reporting, Asset Reconciling Item [Line Items]
Revenues	$ 22,656	$ 18,751	$ 82,385	$ 72,151