Significant accounting policies Inventories (Tables)

12 Months Ended

Jan. 31, 2015

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

	2014	2013
Raw materials	$22,887	$27,330
Work in process	1,254	2,855
Finished goods	6,550	4,311
Subtotal	30,691	34,496
Less allowances	921	949
Inventories, net	$29,770	$33,547