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Note 10 - Stockholders' Equity (Tables)
 9 Months Ended
Oct. 31, 2018
Notes Tables  
Dividends Declared [Table Text Block]
Declaration
Date
Record Date
Payable
 
Dividend
Class A
 
 
Dividend
Class B
 
 
(in thousands)
 
9/11/2018
9/25/2018
10/2/2018
 
$
0.072
 
 
$
0.06
 
 
$
1,374
 
6/11/2018
6/25/2018
7/6/2018
 
$
0.072
 
 
$
0.06
 
 
$
1,372
  
4/10/2018
4/24/2018
5/1/2018
 
$
0.072
 
 
$
0.06
 
 
$
1,359