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Note 17 - Quarterly Results (Unaudited) (Tables)
 12 Months Ended
Mar. 31, 2021
Notes Tables  
Quarterly Financial Information [Table Text Block]

2021

 

First Quarter

  

Second Quarter

  

Third Quarter

  

Fourth Quarter

 

Revenues

 $29,941  $31,860  $34,172  $37,964 

Gross profit

  20,340   21,285   20,653   24,736 

Net income (loss)

  1,217   2,679   (4,542)  3,920 

Basic earnings (loss) per share

 $0.27  $0.52  $(0.89) $0.76 

Diluted earnings (loss) per share

  0.26   0.51   (0.89)  0.74 

2020

 

First Quarter

  

Second Quarter

  

Third Quarter

  

Fourth Quarter

 

Revenues

 $26,288  $25,536  $31,655  $34,208 

Gross profit

  16,204   15,586   14,803   18,769 

Net income

  4,662   3,172   (4,504)  (1,552)

Basic earnings per share

 $1.20  $0.76  $(1.03) $(0.37)

Diluted earnings per share

  1.14   0.73   (1.03)  (0.37)