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Note 3 - Fair Value (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
  

September 30, 2021

 
  

(in thousands)

 
                 

Description

 

Quoted Prices in

Active Markets for

Identical Assets

(Level 1)

  

Significant Other

Observable Inputs

(Level 2)

  

Significant

Unobservable

Inputs (Level 3)

  

Total

 

Assets measured at fair value

                

Cash and cash equivalents (1)

 $59,779  $-  $-  $59,779 

Restricted cash

  1,153   -   -  $1,153 

Short-term investments

  -   57,972   -  $57,972 

Long-term investments

  -   30,142   -  $30,142 

Total assets measured at fair value

 $60,932  $88,114  $-  $149,046 

Liabilities measured at fair value

                

Contingent consideration

 $-  $-  $4,949  $4,949 

Total liabilities measured at fair value

 $-  $-  $4,949  $4,949 
  

December 31, 2020

 
  

(in thousands)

 
                 

Description

 

Quoted Prices in

Active Markets for

Identical Assets

(Level 1)

  

Significant Other

Observable Inputs

(Level 2)

  

Significant

Unobservable

Inputs (Level 3)

  

Total

 

Assets measured at fair value

                

Cash and cash equivalents

 $16,363  $-  $-  $16,363 

Restricted cash

  1,166   -   -   1,166 

Total assets measured at fair value

 $17,529  $-  $-  $17,529 

Liabilities measured at fair value

                

Contingent consideration

 $-  $-  $3,936  $3,936 

Warrant liabilities

  -   -   255   255 

Total liabilities measured at fair value

 $-  $-  $4,191  $4,191 
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
  

December 31,

 

Series B Warrants

 

2020

 
     

Valuation methodology

 

Black-Scholes-Merton

 

Term (years)

  1.32 

Risk free rate

  0.10%

Dividends

  - 

Volatility

  150.97%

Share price

 $0.63 
     Weighted Average (range, if applicable) 
 

Valuation

 

Significant

 

September 30,

  

December 31,

 
 

Methodology

 

Unobservable Input

 

2021

  

2020

 
            

Contingent consideration

Probability weighted income approach

 

Milestone dates

 

2025

to2029  2024to2029 
   

Discount rate

  9.5%    9.5%  
   

Volatility

  70%    71.0%  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Fair Value Measurement at Reporting

Date (Level 3)

 
  

(in thousands)

 
  

Common stock warrants

  

Contingent consideration

 

Balance at December 31, 2020

 $255  $3,936 

Exercise of warrants

  (2,236)  - 

Change in fair value

  1,981   1,013 

Balance at September 30, 2021

 $-  $4,949 
         

Current portion

 $-  $- 

Long-term portion

  -   4,949 

Balance at September 30, 2021

 $-  $4,949