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Note 8 - Stockholders' Equity (Tables)
3 Months Ended
Jun. 30, 2023
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Three Months Ended June 30,

 
  

2023

  

2022

 

Stock-based compensation expense

 $2,968  $3,432 

Amount of income tax (benefit) recognized in earnings

  (872)  (1,992)

Stock-based compensation expense, net of tax

 $2,096  $1,440 
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
  

Stock Options

 
  

Shares Subject to Options

  

Weighted- Average Exercise Price per Share

  

Weighted-Average Remaining Contractual Life (Years)

  

Aggregate Intrinsic Value

 

Outstanding as of March 31, 2023

  163  $200.62   3.3  $1,643 

Awards granted

  53   131.67         

Awards forfeited or expired

  (2)  182.34         

Awards exercised

  -   -         

Outstanding as of June 30, 2023

  214  $183.64   3.8  $119 
Share-Based Payment Arrangement, Activity [Table Text Block]
  

Time-Based Restricted Stock Units

  

Performance-Based Restricted Stock Units

 
  

Number of Shares

  

Weighted- Average Grant Date Fair Value per Share

  

Number of Shares

  

Weighted- Average Grant Date Fair Value per Share

 

Outstanding as of March 31, 2023(1)

  57  $209.27   44  $286.02 

Awards granted(1)

  28   130.19   32   132.29 

Awards forfeited

  (1)  193.30   -   - 

Awards distributed

  (20)  210.83   -   - 

Outstanding as of June 30, 2023(1)

  64  $174.58   76  $223.07