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, 2020		15,713,549
Beginning balance at Jan. 31, 2020	$ 54,818	$ 157	$ 118,782	$ (49,810)	$ (14,311)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,335			3,335
Pension adjustments, net of tax effect	1,031				1,031
Shares vested and others (shares)		205,093
Shares vested and others	(137)	$ 2	(139)
Stock compensation expense	$ 759		759
Ending balance (shares) at Oct. 31, 2020	15,918,642	15,918,642
Ending balance at Oct. 31, 2020	$ 59,806	$ 159	119,402	(46,475)	(13,280)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pension adjustments, tax	364
Beginning balance (shares) at Jul. 31, 2020		15,918,642
Beginning balance at Jul. 31, 2020	54,732	$ 159	119,149	(50,955)	(13,621)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,480			4,480
Pension adjustments, net of tax effect	341				341
Shares vested and others (shares)		0
Shares vested and others	0	$ 0	0
Stock compensation expense	$ 253		253
Ending balance (shares) at Oct. 31, 2020	15,918,642	15,918,642
Ending balance at Oct. 31, 2020	$ 59,806	$ 159	119,402	(46,475)	(13,280)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pension adjustments, tax	$ 124
Beginning balance (shares) at Jan. 31, 2021	15,918,642	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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pension adjustments, tax	1,105
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
Shares vested and others (shares)		0
Shares vested and others	0	$ 0	0
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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pension adjustments, tax	$ 186