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FAIR VALUE MEASUREMENTS
6 Months Ended
Jun. 30, 2023
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS
The following tables present assets and liabilities accounted for at fair value on a recurring basis as of June 30, 2023 and December 31, 2022 (in thousands):

June 30, 2023
Level 1Level 2Level 3Total
Derivative instruments, liabilities
Commodity$3,357 $— $— $3,357 
Derivative warrants— — 13,855 13,855 
Derivative instruments, liabilities3,357 — 13,855 17,212 
Total$(3,357)$— $(13,855)$(17,212)
December 31, 2022
Level 1Level 2Level 3Total
Derivative instruments, liabilities
Commodity$242 $— $— $242 
Derivative warrants— — 14,270 14,270 
Derivative instruments, liabilities242 — 14,270 14,512 
Total$(242)$— $(14,270)$(14,512)
Level 3 instruments include the Initial Warrants and Additional Warrants granted in connection with the Loan and Security Agreement, see Note 15 "Financing Agreements". We revalued the 2.8 million warrants granted and outstanding at June 30, 2023 using the Dynamic Black-Scholes model that computes the impact of a possible change in control transaction upon the exercise of the warrant shares. The Dynamic Black-Scholes Merton unobservable inputs used were as follows:

Dynamic Black-Scholes Merton Unobservable Inputs
Initial WarrantsAdditional Warrants
Expected dividend rate— %— %
Expected volatility112.74 %108.72 %
Risk free interest rate4.31 %4.13 %
Expected term4.04.5

The following is an analysis of changes in the derivative liability classified as level 3 in the fair value hierarchy as of June 30, 2023 and December 31, 2022 (in thousands):

Level Three Roll-Forward
June 30, 2023December 31, 2022
Balance at beginning of period$14,270 $75,211 
Warrants granted— 25,669 
Equity component of the convertible senior note— (78,789)
Change in valuation of warrants included in net income(415)(7,821)
Balance at end of period$13,855 $14,270 

See Note 20 "Commodity Derivative Instruments", below for information on the impact on results of operations of our commodity derivative instruments.