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Note 3 - Net Income Per Share (Tables)
6 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
  

Three Months Ended
September 30,

  

Six Months Ended
September 30,

 
  

2020

  

2019

  

2020

  

2019

 

Net income (numerator):

                

Net income

 $8,412  $6,665  $16,180  $12,008 

Shares (denominator):

                

Weighted average number of common shares outstanding used in basic computation

  20,063   19,963   20,024   20,098 

Common shares issuable upon vesting of restricted stock

  81   -   64   1 

Common shares issuable upon conversion of preferred shares

  10   10   10   10 

Shares used in diluted computation

  20,154   19,973   20,098   20,109 

Net income per common share:

                

Basic

 $0.42  $0.33  $0.81  $0.60 

Diluted

 $0.42  $0.33  $0.81  $0.60