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Note 4 - Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
   

September 30, 2023

 

(In thousands)

 

Level 1

   

Level 2

   

Level 3

   

Total

 

Assets:

                               

Cash and cash equivalents (1)

  $ 21,669     $ -     $ -     $ 21,669  

Restricted cash

    1,615       -       -       1,615  

Short-term investments

    -       11,420       -       11,420  

Total assets

  $ 23,284     $ 11,420     $ -     $ 34,704  

Liabilities:

                               

Contingent consideration

  $ -     $ -     $ 1,930     $ 1,930  

Warrant liabilities

    -       -       4,842       4,842  

Total liabilities

  $ -     $ -     $ 6,772     $ 6,772  
   

December 31, 2022

 

(In thousands)

 

Level 1

   

Level 2

   

Level 3

   

Total

 

Assets:

                               

Cash and cash equivalents (1)

  $ 6,329     $ -     $ -     $ 6,329  

Restricted cash

    1,141       -       -       1,141  

Short-term investments

    -       64,195       -       64,195  

Long-term investments

    -       3,865       -       3,865  

Total assets

  $ 7,470     $ 68,060     $ -     $ 75,530  

Liabilities:

                               

Contingent consideration

  $ -     $ -     $ 1,256     $ 1,256  

Total liabilities

  $ -     $ -     $ 1,256     $ 1,256  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

(In thousands)

 

Fair Value

 

Balance at December 31, 2022

  $ 1,256  

Change in fair value

    105  
Balance at March 31, 2023     1,361  
Change in fair value     203  
Balance at June 30, 2023     1,564  
Change in fair value     366  

Balance at September 30, 2023

  $ 1,930  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
   

Valuation

Methodology

 

Significant Unobservable

Inputs

 

September 30, 2023

   

December 31, 2022

 
                         

Contingent consideration

 

Probability weighted income approach

 

Milestone date

 

2032

   

2032

 
       

Revenue discount rate

    11.0%       16.5%  
       

Revenue volatility

    37.5%       45.0%  
       

EUR-to-USD exchange rate

    1.06       1.07  
  

As of July 31,

2023

  

As of September 30,

2023

 

Expected volatility

  115%  115%

Risk-free interest rate

  4.2%  4.6%

Expected life (in years)

  5.0   4.8 

Expected dividend yield

  0%  0%
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]

(In thousands)

 

Fair Value

 

Balance at June 30, 2023

  $ -  

Issuance of warrants

    7,120  

Change in fair value

    (2,278 )

Balance at September 30, 2023

  $ 4,842