Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Related Party Transaction [Line Items]
Revenues from external customers	$ 30,424	$ 32,836	$ 60,262	$ 55,421
Continuing Operations
Related Party Transaction [Line Items]
Revenues from external customers	30,424	32,836	60,262	55,421
Collaborative Arrangement
Related Party Transaction [Line Items]
Revenues from external customers	4,315	6,450	15,036	12,421
Collaborative Arrangement | Continuing Operations
Related Party Transaction [Line Items]
Revenues from external customers	4,315	6,450	15,036	12,421
Collaborative Arrangement | Continuing Operations | Related Parties, Aggregated
Related Party Transaction [Line Items]
Revenues from external customers	$ 32	$ 5,902	$ 230	$ 10,692