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Fair Value Measurements (Tables)
6 Months Ended
Dec. 31, 2020
Schedule of Financial Instruments Measured at Fair Value on Recurring Basis
We measure the following financial instruments at fair value on a recurring basis. The fair values of these financial instruments were as follows (in thousands):
 
   
December 31, 2020
  
June 30, 2020
 
   
Level 1
   
Level 2
   
Level 3
  
Level 1
   
Level 2
   
Level 3
 
Warrant liability
  $—     $—     $(20,176 $—     $—     $(40,483
   
 
 
   
 
 
   
 
 
  
 
 
   
 
 
   
 
 
 
Total
  $—     $—     $(20,176 $—     $—     $(40,483
   
 
 
   
 
 
   
 
 
  
 
 
   
 
 
   
 
 
 
Schedule of Assumptions Used to Calculate Fair Value of Warrant Liability
To calculate the fair value of the warrant liability, the following assumptions were used:
 
   
December 31,
  
June 30,
 
   
2020
  
2020
 
Risk-free interest rate
   0.1  0.2
Expected life (years)
   2.4   2.9 
Expected volatility
   80.5  77.4
Dividend yield
   0.0  0.0
Black-Scholes Fair Value
  $1.26  $2.52 
Schedule of Changes in Estimated Fair Value of Warrant Liability
The following table sets forth a summary of changes in the estimated fair value of our Level 3 warrant liability for the six months ended December 31, 2020 and 2019 (in thousands):
 
   
Fair Value of Warrants Using Significant
 
   
Unobservable Inputs (Level 3)
 
   
2020
   
2019
 
Balance at July 1,
  $(40,483  $(17,613
Change in estimated fair value of liability classified warrants
   20,307    830 
   
 
 
   
 
 
 
Balance at December 31,
  $(20,176  $(16,783