Significant accounting policies Long-lived assets (Tables)

12 Months Ended

Jan. 31, 2017

Long lived assets [Abstract]

Property, Plant and Equipment [Table Text Block]

	2016	2015
Land, buildings and improvements	$22,330	$14,758
Machinery and equipment	44,538	41,534
Furniture, office equipment and computer systems	4,704	5,632
Transportation equipment	3,690	40
Subtotal	75,262	61,964
Less accumulated depreciation and amortization	38,987	36,564
Property, plant and equipment, net	$36,275	$25,400