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Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net loss	$ (6,351)	$ (11,132)
Other comprehensive loss:
Amortization of prior service credit	(61)	(61)
Other comprehensive loss	(61)	(61)
Comprehensive loss	$ (6,412)	$ (11,193)

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