Net Income per Common Share - Reconciliation between basic and diluted net income per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Net Income per Common Share
Net Income (Loss)	$ 5,802	$ 3,236
Basic net income (loss) per share:
Basic common shares	45,484	46,286
Basic net income (loss) per share (in dollars per share)	$ 0.13	$ 0.07
Diluted net income (loss) per share:
Basic common shares	45,484	46,286
Diluted restricted stock awards and stock options	1,250	1,156
Diluted common shares	46,734	47,442
Diluted net income (loss) per share (in dollars per share)	$ 0.12	$ 0.07