CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
Net loss	$ (9,500)	$ (810)	$ (11,048)	$ (485)
Other comprehensive income items:
Actuarial gains	16	29	32	56
Income tax expense on actuarial losses	(4)	(7)	(7)	(12)
Other comprehensive income:
Retirement benefits adjustments, net of income taxes	12	22	25	44
Total comprehensive loss	$ (9,488)	$ (788)	$ (11,023)	$ (441)