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Note 8 - Stock Based Compensation (Tables)
6 Months Ended
Sep. 30, 2016
Notes Tables  
Share-based Compensation, Stock Options, Activity [Table Text Block]
   
Shares
 
         
Outstanding as of March 31, 2016
   
40,000
 
Activity during the three months ended September 30, 2016
       
Granted
   
-
 
Exercised
   
-
 
Canceled (forfeited/expired)
   
(30,000
)
Outstanding as of September 30, 2016
   
10,000
 
Exerciseable as of September 30, 2016
   
10,000