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Note 13 - Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Level 3 Liabilities

 

(in thousands)

 

Warrant Liabilities

 
     

Balance at January 1, 2020

 $- 

Reclassification of warrant liability

  1,986 

Unrealized gains on warrants, net

  (139)

Balance at December 31, 2020

  1,847 
     

Unrealized gains on warrants, net

  (573)

Reclassification of warrant liability to additional paid in capital upon Warrant Modification

  (1,274)

Balance at December 31 ,2021

 $-