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Retirement plans Plan assets (Tables)
12 Months Ended
Jan. 31, 2018
Retirement Benefits [Abstract]  
Schedule of Allocation of Plan Assets [Table Text Block]
(In thousands)
2017

2016

Level 1 market value of plan assets
 
 
Equity securities
$3,819
$3,000
U.S. bond market
1,843
2,188
Real estate securities
199

214

Subtotal
5,861
5,402
Level 2 significant other observable inputs
 
 
Money market fund
$171
$306
  Subtotal
171
306
Investments measured at net asset value*
$668
$520
Total
$6,700
$6,228