Condensed Consolidated Statements of Comprehensive Income (Loss) Unaudited - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3,892	$ 2,932	$ 6,692	$ 4,835
Other comprehensive income:
Pension adjustments	130	1,376	390	27
Comprehensive income (loss)	$ 4,022	$ 4,308	$ 7,082	$ 4,862