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)	1,903			1,903
Cash dividends	(463)			(463)
Pension adjustments, net of tax effect	(1,349)				(1,349)
Shares vested and others (shares)		184,499
Shares vested and others	(266)	$ 1	(267)
Stock compensation expense	$ 438		438
Ending balance (shares) at Jul. 31, 2018	15,541,956	15,541,956
Ending balance at Jul. 31, 2018	$ 58,975	$ 155	117,636	(48,208)	(10,608)
Beginning balance (shares) at Apr. 30, 2018		15,357,457
Beginning balance at Apr. 30, 2018	55,264	$ 154	117,693	(53,451)	(9,132)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	5,475			5,475
Cash dividends	(232)			(232)
Pension adjustments, net of tax effect	(1,476)				(1,476)
Shares vested and others (shares)		184,499
Shares vested and others	(266)	$ 1	(267)
Stock compensation expense	$ 210		210
Ending balance (shares) at Jul. 31, 2018	15,541,956	15,541,956
Ending balance at Jul. 31, 2018	$ 58,975	$ 155	117,636	(48,208)	(10,608)
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)	2,800			2,800
Cash dividends	0			0
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)
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 (loss)	5,867			5,867
Cash dividends	0			0
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)