Significant accounting policies Inventories (Tables)

12 Months Ended

Jan. 31, 2014

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

	2013	2012
Raw materials	$27,330	$31,820
Work in process	2,855	2,333
Finished goods	4,311	4,051
Subtotal	34,496	38,204
Less allowances	949	675
Inventories, net	$33,547	$37,529