XML 29 R18.htm IDEA: XBRL DOCUMENT v3.19.1
Note 9 - Stock Repurchase Program (Tables)
 9 Months Ended
Jan. 31, 2019
Notes Tables  
Class of Treasury Stock [Table Text Block]
Period
  
Total Number
of Shares
Purchased
    
Average
Price Paid
per Share
    
Total Number of Shares
Purchased as Part of
Publicly Announced
Plans or Programs
    
Approximate Dollar Value
of Shares That May Yet Be
Purchased Under the Plans
or Programs
  
Program authorization
    
 
      
 
      
 
     $
750
  
Quarter ended January 31, 2017 (a)
    
49,920
     $
0.20
      
49,920
     $
740
  
Quarter ended April 30, 2017
    
80,426
     $
0.27
      
80,426
     $
718
  
Quarter ended July 31, 2017
    
-
     $
-
      
-
     $
718
  
Quarter ended October 31, 2017
    
8,607
     $
0.30
      
8,607
     $
715
  
Quarter ended January 31, 2018 (a)
    
536,058
     $
0.26
      
536,058
     $
576
  
Quarter ended April 30, 2018 (a)
    
178,526
     $
0.25
      
178,526
     $
531
  
Quarter ended July 31, 2018 (a)
    
25,277
     $
0.26
      
25,277
     $
525
  
Quarter ended October 31, 2018 (a)
    
480,805
     $
0.30
      
480,805
     $
381
  
Quarter ended January 31, 2019 (a)
    
186,727
     $
0.34
      
186,727
     $
317
  
Total
    
1,546,346
     $
0.28
      
1,546,346