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)	(1,145)			(1,145)
Pension adjustments, net of tax effect	690				690
Shares vested and others (shares)		205,093
Shares vested and others	(137)	$ 2	(139)
Stock compensation expense	$ 506		506
Ending balance (shares) at Jul. 31, 2020	15,918,642	15,918,642
Ending balance at Jul. 31, 2020	$ 54,732	$ 159	119,149	(50,955)	(13,621)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pension adjustments, tax	240
Beginning balance (shares) at Apr. 30, 2020		15,713,549
Beginning balance at Apr. 30, 2020	50,719	$ 157	119,036	(54,508)	(13,966)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,553			3,553
Pension adjustments, net of tax effect	345				345
Shares vested and others (shares)		205,093
Shares vested and others	(137)	$ 2	(139)
Stock compensation expense	$ 252		252
Ending balance (shares) at Jul. 31, 2020	15,918,642	15,918,642
Ending balance at Jul. 31, 2020	$ 54,732	$ 159	119,149	(50,955)	(13,621)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pension adjustments, tax	$ 120
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)	(149)			(149)
Pension adjustments, net of tax effect	2,587				2,587
Shares vested and others (shares)		183,381
Shares vested and others	(174)	$ 2	(176)
Stock compensation expense	$ 506		506
Ending balance (shares) at Jul. 31, 2021	16,102,023	16,102,023
Ending balance at Jul. 31, 2021	$ 56,957	$ 161	119,985	(52,191)	(10,998)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pension adjustments, tax	919
Beginning balance (shares) at Apr. 30, 2021		15,918,642
Beginning balance at Apr. 30, 2021	50,858	$ 159	119,908	(55,951)	(13,258)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,760			3,760
Pension adjustments, net of tax effect	2,260				2,260
Shares vested and others (shares)		183,381
Shares vested and others	(174)	$ 2	(176)
Stock compensation expense	$ 253		253
Ending balance (shares) at Jul. 31, 2021	16,102,023	16,102,023
Ending balance at Jul. 31, 2021	$ 56,957	$ 161	$ 119,985	$ (52,191)	$ (10,998)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pension adjustments, tax	$ 803