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Note 2 - Basis of Presentation, Principles of Consolidation, Significant Accounting Policies and Liquidity (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

Description

 

Fair Value

  

Level 1

  

Level 2

  

Level 3

 

Fair value of warrant liability as of June 30, 2021:

 $5,390  $  $  $5,390 

Fair value of warrant liability as of December 31, 2020:

 $8,192  $  $  $8,192 

Three Months Ended June 30, 2021

 

Warrant Liability Long-Term

  

Warrant Liability Total

 

Balance, March 31, 2021

 $6,563  $6,563 

Change in fair value - net

  (1,173)  (1,173)

Balance, June 30, 2021

 $5,390  $5,390 

Six Months Ended June 30, 2021

 

Warrant Liability Long-Term

  

Warrant Liability Total

 

Balance, December 31, 2020

 $8,192  $8,192 

Exercise of warrants

  (52)  (52)

Change in fair value - net

  (2,750)  (2,750)

Balance, June 30, 2021

 $5,390  $5,390