CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Apr. 30, 2024	Jan. 31, 2024	Apr. 30, 2023
CONDENSED CONSOLIDATED BALANCE SHEETS
Allowance for doubtful accounts	$ 1,195	$ 1,471	$ 18,832
Preferred stock, shares authorized	1,000,000	1,000,000	1,000,000
Preferred stock, shares issued	0	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	120,000,000	120,000,000	120,000,000
Common stock, shares issued	49,396,000	49,396,000	49,396,000
Treasury stock, shares	4,430,000	3,668,000	3,802,000