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, 2021		15,918,642
Beginning balance at Jan. 31, 2021	$ 54,187	$ 159	$ 119,655	$ (52,042)	$ (13,585)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,176			1,176
Pension adjustments, net of tax effect	3,153				3,153
Shares vested and others (shares)		183,381
Shares vested and others	(174)	$ 2	(176)
Stock compensation expense	$ 759		759
Ending balance (shares) at Oct. 31, 2021	16,102,023	16,102,023
Ending balance at Oct. 31, 2021	$ 59,101	$ 161	120,238	(50,866)	(10,432)
Beginning balance (shares) at Jul. 31, 2021		16,102,023
Beginning balance at Jul. 31, 2021	56,957	$ 161	119,985	(52,191)	(10,998)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,325			1,325
Pension adjustments, net of tax effect	566				566
Stock compensation expense	$ 253		253
Ending balance (shares) at Oct. 31, 2021	16,102,023	16,102,023
Ending balance at Oct. 31, 2021	$ 59,101	$ 161	120,238	(50,866)	(10,432)
Beginning balance (shares) at Jan. 31, 2022	16,102,023	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)	12,471			12,471
Pension adjustments, net of tax effect	3,815				3,815
Shares vested and others (shares)		108,962
Shares vested and others	(213)	$ 1	(214)
Stock compensation expense	$ 509		509
Ending balance (shares) at Oct. 31, 2022	16,210,985	16,210,985
Ending balance at Oct. 31, 2022	$ 64,028	$ 162	120,787	(54,707)	(2,214)
Beginning balance (shares) at Jul. 31, 2022		16,210,985
Beginning balance at Jul. 31, 2022	52,505	$ 162	120,684	(62,582)	(5,759)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	7,875			7,875
Pension adjustments, net of tax effect	3,545				3,545
Stock compensation expense	$ 103		103
Ending balance (shares) at Oct. 31, 2022	16,210,985	16,210,985
Ending balance at Oct. 31, 2022	$ 64,028	$ 162	$ 120,787	$ (54,707)	$ (2,214)