Retirement plans Plan assets (Tables)

12 Months Ended

Jan. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of Allocation of Plan Assets [Table Text Block]

Level 1 market value of plan assets	2015	2014
Equity securities	$3,062	$3,795
U.S. bond market	2,168	2,033
Subtotal	5,230	5,828
Level 2 significant other observable inputs
Money market fund	$351	$340
Equity securities	302	0
Subtotal	653	340
Total	5,883	6,168