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Fair Value of Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2021
Fair Value of Financial Instruments  
Summary of reconciliation of all liabilities measured at fair value using Level 3 significant unobservable inputs

The following table provides a reconciliation of all liabilities measured at fair value using Level 3 significant unobservable inputs (in thousands):

    

Convertible

Promissory Notes

Balance at December 31, 2019

$

2,500

Change in fair value of convertible promissory notes, related party

 

580

Balance at June 30, 2020

$

3,080