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, 2022		16,102,023
Beginning balance at Jan. 31, 2022	$ 47,446	$ 161	$ 120,492	$ (67,178)	$ (6,029)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,596			4,596
Pension adjustments, net of tax effect	270				270
Shares vested and others (shares)		108,962
Shares vested and others	(213)	$ 1	(214)
Stock compensation expense	$ 406		406
Ending balance (shares) at Jul. 31, 2022	16,210,985	16,210,985
Ending balance at Jul. 31, 2022	$ 52,505	$ 162	120,684	(62,582)	(5,759)
Beginning balance (shares) at Apr. 30, 2022		16,102,023
Beginning balance at Apr. 30, 2022	42,750	$ 161	120,745	(72,262)	(5,894)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	9,680			9,680
Pension adjustments, net of tax effect	135				135
Shares vested and others (shares)		108,962
Shares vested and others	(213)	$ 1	(214)
Stock compensation expense	$ 153		153
Ending balance (shares) at Jul. 31, 2022	16,210,985	16,210,985
Ending balance at Jul. 31, 2022	$ 52,505	$ 162	120,684	(62,582)	(5,759)
Beginning balance (shares) at Jan. 31, 2023	16,210,985	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				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				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)