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 income
Beginning balance (shares) at Jan. 31, 2018		15,357,457
Beginning balance at Jan. 31, 2018	$ 58,712	$ 154	$ 117,465	$ (49,648)	$ (9,259)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,835			4,835
Cash dividends	(697)			(697)
Pension adjustments, net of tax effect	27				27
Shares vested and others (shares)		184,499
Shares vested and others	(266)	$ 1	(267)
Stock compensation expense	$ 673		673
Ending balance (shares) at Oct. 31, 2018	15,541,956	15,541,956
Ending balance at Oct. 31, 2018	$ 63,284	$ 155	117,871	(45,510)	(9,232)
Beginning balance (shares) at Jul. 31, 2018		15,541,956
Beginning balance at Jul. 31, 2018	58,975	$ 155	117,636	(48,208)	(10,608)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,932			2,932
Cash dividends	(234)			(234)
Pension adjustments, net of tax effect	1,376				1,376
Shares vested and others (shares)		0
Shares vested and others	0	$ 0	0
Stock compensation expense	$ 235		235
Ending balance (shares) at Oct. 31, 2018	15,541,956	15,541,956
Ending balance at Oct. 31, 2018	$ 63,284	$ 155	117,871	(45,510)	(9,232)
Beginning balance (shares) at Jan. 31, 2019	15,541,956	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 (loss)	6,692			6,692
Cash dividends	0			0
Pension adjustments, net of tax effect	390				390
Shares vested and others (shares)		171,593
Shares vested and others	(246)	$ 2	(248)
Stock compensation expense	$ 686		686
Ending balance (shares) at Oct. 31, 2019	15,713,549	15,713,549
Ending balance at Oct. 31, 2019	$ 64,549	$ 157	118,544	(45,500)	(8,652)
Beginning balance (shares) at Jul. 31, 2019		15,713,549
Beginning balance at Jul. 31, 2019	60,265	$ 157	118,282	(49,392)	(8,782)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,892			3,892
Cash dividends	0			0
Pension adjustments, net of tax effect	130				130
Shares vested and others (shares)		0
Shares vested and others	0	$ 0	0
Stock compensation expense	$ 262		262
Ending balance (shares) at Oct. 31, 2019	15,713,549	15,713,549
Ending balance at Oct. 31, 2019	$ 64,549	$ 157	$ 118,544	$ (45,500)	$ (8,652)