Unaudited Consolidated Statements of Changes in Equity and Accumulated Other Comprehensive Income (Loss) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance (shares) at Jan. 31, 2019		15,541,956
Beginning balance at Jan. 31, 2019	$ 57,027	$ 155	$ 118,106	$ (52,192)	$ (9,042)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,800			2,800
Pension adjustments, net of tax effect	260				260
Shares vested and others (shares)		171,593
Shares vested and others	(245)	$ 2	(247)
Stock compensation expense	$ 423		423
Ending balance (shares) at Jul. 31, 2019	15,713,549	15,713,549
Ending balance at Jul. 31, 2019	$ 60,265	$ 157	118,282	(49,392)	(8,782)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pension adjustments, tax	91
Beginning balance (shares) at Apr. 30, 2019		15,541,956
Beginning balance at Apr. 30, 2019	54,276	$ 155	118,292	(55,259)	(8,912)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,867			5,867
Pension adjustments, net of tax effect	130				130
Shares vested and others (shares)		171,593
Shares vested and others	(245)	$ 2	(247)
Stock compensation expense	$ 237		237
Ending balance (shares) at Jul. 31, 2019	15,713,549	15,713,549
Ending balance at Jul. 31, 2019	$ 60,265	$ 157	118,282	(49,392)	(8,782)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pension adjustments, tax	$ 45
Beginning balance (shares) at Jan. 31, 2020	15,713,549	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	(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	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