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Discontinued Operations - Non-cash Items and Purchases of Property, Plant and Equipment for MBP Titan (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		$ 17,516	$ 24,896	$ 33,112
Impairment of goodwill	$ 178	9,635	87,862	0
Stock-based compensation expense		18,366	18,950	36,296
Cash flows from investing activities
Purchases of property, plant and equipment		(7,527)	(37,883)	(41,587)
Discontinued Operations, Disposed of by Means Other than Sale, Abandonment | MBP Titan
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		2,474	3,647	3,493
Impairment of goodwill		9,635	0	0
Impairment of other noncurrent assets		12,406	0	0
Stock-based compensation expense		(34)	1,345	1,870
Cash flows from investing activities
Purchases of property, plant and equipment		$ (88)	$ (2,114)	$ (3,558)

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