Unaudited Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance (shares) at Jan. 31, 2023		16,210,985
Beginning balance at Jan. 31, 2023	$ 68,061	$ 162	$ 120,890	$ (50,631)	$ (2,360)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	14,092			14,092
Pension adjustments, net of tax effect	0
Shares vested and others (shares)		136,329
Shares vested and others	(110)	$ 2	(112)
Stock compensation expense	$ 252		252
Ending balance (shares) at Jul. 31, 2023	16,347,314	16,347,314
Ending balance at Jul. 31, 2023	$ 82,295	$ 164	121,030	(36,539)	(2,360)
Beginning balance (shares) at Apr. 30, 2023		16,210,985
Beginning balance at Apr. 30, 2023	66,722	$ 162	120,993	(52,073)	(2,360)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	15,534			15,534
Pension adjustments, net of tax effect	0
Shares vested and others (shares)		136,329
Shares vested and others	(110)	$ 2	(112)
Stock compensation expense	$ 149		149
Ending balance (shares) at Jul. 31, 2023	16,347,314	16,347,314
Ending balance at Jul. 31, 2023	$ 82,295	$ 164	121,030	(36,539)	(2,360)
Beginning balance (shares) at Jan. 31, 2024	16,347,314	16,347,314
Beginning balance at Jan. 31, 2024	$ 91,179	$ 164	121,373	(29,048)	(1,310)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	18,973			18,973
Cash dividends	(653)			(653)
Pension adjustments, net of tax effect	(47)				(47)
Shares vested and others (shares)		81,794
Shares vested and others	(411)	$ 1	(412)
Stock compensation expense	270		270
Stock repurchase (shares)		(139,702)
Stock repurchase	$ (1,499)	$ (2)	(1,497)
Ending balance (shares) at Jul. 31, 2024	16,289,406	16,289,406
Ending balance at Jul. 31, 2024	$ 107,812	$ 163	119,734	(10,728)	(1,357)
Beginning balance (shares) at Apr. 30, 2024		16,207,612
Beginning balance at Apr. 30, 2024	91,637	$ 162	120,048	(27,235)	(1,338)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	16,833			16,833
Cash dividends	(326)			(326)
Pension adjustments, net of tax effect	(19)				(19)
Shares vested and others (shares)		81,794
Shares vested and others	(411)	$ 1	(412)
Stock compensation expense	$ 98		98
Ending balance (shares) at Jul. 31, 2024	16,289,406	16,289,406
Ending balance at Jul. 31, 2024	$ 107,812	$ 163	$ 119,734	$ (10,728)	$ (1,357)