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Note 15 - Equity Incentive Plans (Tables)
12 Months Ended
Dec. 31, 2021
Stock Incentive Plan 2010 [Member]  
Notes Tables  
Nonvested Restricted Stock Shares Activity [Table Text Block]

Period

 

Total Number of Restricted Shares Issued

   Total Number of Non-Qualified Stock Options Granted  

Vesting Periods Years

 
             

January 1, 2021 to March 31, 2021

 (121,499)(1)    N/A  

April 1, 2021 to June 30, 2021

 (89,673)(2)(3)   0to4 

July 1, 2021 to September 30, 2021

 3,915,502 (2)(4)(6) 4,668,727(5)(7) 2to3 

October 1, 2021 to December 31, 2021

 108,685 (2)(6)(8) 76,089(7)(9) 2to4 
             

Total

 3,813,015   4,744,816