Condensed Consolidated Statements of Comprehensive Income (Loss) Unaudited - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 5,867	$ 5,475	$ 2,800	$ 1,903
Other comprehensive income:
Pension adjustments	130	(1,476)	260	(1,349)
Comprehensive income (loss)	$ 5,997	$ 3,999	$ 3,060	$ 554