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Note 7 - Stock Based Compensation (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

(number of shares in thousands)

  Shares   Weighted average grant date price 

Non-vested, December 31, 2021

  196   11.26 

Granted

  78   17.65 

Vested

  (19)  8.91 

Non-vested, March 31, 2022

  255   13.37 
Share-Based Payment Arrangement, Option, Activity [Table Text Block]

(number of shares in thousands)

  Number of shares underlying options   Weighted average exercise price per share   Weighted average grant date fair value 

Outstanding, December 31, 2021

  13   5.47   2.98 

Granted

  -   -   - 

Outstanding, March 31, 2022

  13   5.47   2.98 
Schedule of Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block]

(number of options in thousands)

  Number of shares underlying options   Weighted average exercise price per share   Weighted average remaining contractual life (years)   Aggregate intrinsic value 

Outstanding and exercisable

  13  $5.47   6.0  $190