Unaudited Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)
Beginning balance (shares) at Jan. 31, 2024		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
Stock repurchase (shares)		0
Stock repurchase	$ 0	$ 0	0
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 Jan. 31, 2025	16,087,082	16,087,082
Beginning balance at Jan. 31, 2025	$ 109,265	$ 161	117,549	(8,867)	422
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	10,918			10,918
Cash dividends	(787)			(787)
Pension adjustments, net of tax effect	(134)				(134)
Shares vested and others (shares)		23,003
Shares vested and others	0	$ 0	0
Stock compensation expense	114		114
Stock repurchase (shares)		(348,944)
Stock repurchase	$ (4,000)	$ (4)	(3,996)
Ending balance (shares) at Jul. 31, 2025	15,761,141	15,761,141
Ending balance at Jul. 31, 2025	$ 115,376	$ 157	113,667	1,264	288
Beginning balance (shares) at Apr. 30, 2025		15,738,138
Beginning balance at Apr. 30, 2025	105,600	$ 157	113,616	(8,528)	355
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	10,186			10,186
Cash dividends	(394)			(394)
Pension adjustments, net of tax effect	(67)				(67)
Shares vested and others (shares)		23,003
Shares vested and others	0	$ 0	0
Stock compensation expense	51		51
Stock repurchase (shares)		0
Stock repurchase	$ 0	$ 0	0
Ending balance (shares) at Jul. 31, 2025	15,761,141	15,761,141
Ending balance at Jul. 31, 2025	$ 115,376	$ 157	$ 113,667	$ 1,264	$ 288