Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3,760	$ 3,553	$ (149)	$ (1,145)
Other comprehensive income:
Pension adjustments, net of tax effect	2,260	345	2,587	690
Net comprehensive income (loss)	$ 6,020	$ 3,898	$ 2,438	$ (455)