Significant accounting policies Inventories (Tables)

12 Months Ended

Jan. 31, 2016

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

	2015	2014
Raw materials	$15,291	$13,150
Work in process	1,168	887
Finished goods	722	715
Subtotal	17,181	14,752
Less allowances	1,556	1,067
Inventories, net	$15,625	$13,685