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Note 7 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]
  

Derivatives at Fair Value as of June 30, 2020

 

(in thousands)

 

Level 1

  

Level 2

  

Level 3

  

Total

 
                 

Warrant derivative liabilities

 $-  $-  $2,037  $2,037 

Total warrant derivative liabilities

 $-  $-  $2,037  $2,037 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Level 3 Liabilities

 

(in thousands)

 

Warrant Derivative Liabilities

 
     

Balance at December 31, 2019

 $- 

Reclassification of warrant liability

  1,986 

Unrealized loss on warrants

  561 

Balance at March 31, 2020

  2,547 

Unrealized gain on warrants

  (510

)

Balance at June 30, 2020

 $2,037