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Note 10 - Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2022
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

2022

  

2021

 

Warrants outstanding at January 1

  1,015,000   515,000 

Warrants issued in connection with public offering and private placement

  34,905,000   - 

Exercises and conversions

  -   - 

Warrants outstanding at June 30

  35,920,000   515,000 
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
  

June 30, 2022

 
  

Number of

units

  

Weighted

Average
Grant-Date

Fair value

  

Aggregated

Intrinsic
Value

 
             

Outstanding, December 31, 2021

  149,636  $6.59  $- 

Granted

  2,649,207   0.76   - 

Vested and settled with share issuance

  (66,982

)

  (6.56

)

  - 

Forfeited

  (144,853

)

  (6.22

)

  - 

Outstanding, June 30, 2022

  2,587,009  $0.64  $-