Significant accounting policies Inventories (Tables)

12 Months Ended

Jan. 31, 2018

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

(In thousands)	2017	2016
Raw materials	$17,166	$13,648
Work in process	291	1,105
Finished goods	1,024	836
Subtotal	18,481	15,589
Less allowance	1,625	2,024
Inventories	$16,856	$13,565