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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	$ (4,350)	$ (8,381)	$ (15,482)	$ (28,773)
Other comprehensive loss:
Amortization of prior service credit	(61)	(61)	(122)	(122)
Other comprehensive loss	(61)	(61)	(122)	(122)
Comprehensive loss	$ (4,411)	$ (8,442)	$ (15,604)	$ (28,895)

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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