Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net loss	$ (25,014)	$ (29,647)	$ (37,285)	$ (65,174)
Other comprehensive loss:
Unrealized loss on note receivable	(846)	0	(846)	0
Change in liability of pension plans	138	(207)	(59)	(278)
Total comprehensive loss	$ (25,722)	$ (29,854)	$ (38,190)	$ (65,452)