Property, Plant and Equipment, net Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, net	$ 14,232		$ 14,232		$ 14,985
Depreciation expense	1,885	$ 3,104	5,692	$ 9,954
Amount capitalized to internal use software	520	1,011	2,673	2,907
Property, plant, and equipment, excluding internal-use software
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	19,354		19,354		21,596
Less: Accumulated depreciation and amortization	(13,911)		(13,911)		(17,078)
Property, plant, and equipment, net	5,443		5,443		4,518
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	13,771		13,771		12,144
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	1,325		1,325		2,292
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	4,258		4,258		7,160
Internal-use software
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	35,945		35,945		33,278
Construction in progress - Internal-use software	3,263		3,263		2,973
Less: Accumulated depreciation and amortization	(30,419)		(30,419)		(25,784)
Property, plant, and equipment, net	8,789		8,789		$ 10,467
Depreciation expense	$ 1,489	$ 2,174	$ 4,545	$ 7,122