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)	24,252			24,252
Pension adjustments, net of tax effect	1,163				1,163
Shares vested and others (shares)		136,329
Shares vested and others	(110)	$ 2	(112)
Stock compensation expense	$ 423		423
Ending balance (shares) at Oct. 31, 2023	16,347,314	16,347,314
Ending balance at Oct. 31, 2023	$ 93,789	$ 164	121,201	(26,379)	(1,197)
Beginning balance (shares) at Jul. 31, 2023		16,347,314
Beginning balance at Jul. 31, 2023	82,295	$ 164	121,030	(36,539)	(2,360)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	10,160			10,160
Pension adjustments, net of tax effect	1,163				1,163
Shares vested and others (shares)		0
Shares vested and others	0	$ 0	0
Stock compensation expense	$ 171		171
Ending balance (shares) at Oct. 31, 2023	16,347,314	16,347,314
Ending balance at Oct. 31, 2023	$ 93,789	$ 164	121,201	(26,379)	(1,197)
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)	27,374			27,374
Cash dividends	(1,060)			(1,060)
Pension adjustments, net of tax effect	(56)				(56)
Shares vested and others (shares)		81,794
Shares vested and others	(412)	$ 1	(413)
Stock compensation expense	333		333
Stock repurchase (shares)		(139,702)
Stock repurchase	$ (1,499)	$ (2)	(1,497)
Ending balance (shares) at Oct. 31, 2024	16,289,406	16,289,406
Ending balance at Oct. 31, 2024	$ 115,859	$ 163	119,796	(2,734)	(1,366)
Beginning balance (shares) at Jul. 31, 2024		16,289,406
Beginning balance at Jul. 31, 2024	107,812	$ 163	119,734	(10,728)	(1,357)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	8,401			8,401
Cash dividends	(407)			(407)
Pension adjustments, net of tax effect	(9)				(9)
Shares vested and others (shares)		0
Shares vested and others	(1)	$ 0	(1)
Stock compensation expense	$ 63		63
Ending balance (shares) at Oct. 31, 2024	16,289,406	16,289,406
Ending balance at Oct. 31, 2024	$ 115,859	$ 163	$ 119,796	$ (2,734)	$ (1,366)