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Supplemental Cash Flow Information
 6 Months Ended
Jun. 30, 2023
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information Supplemental Cash Flow Information
Supplemental cash flow information is as follows (in thousands):
        
 Six months ended June 30,
 20232022
Supplemental cash flow information:
Interest paid$23 $7 
Supplemental non cash financing and investing activities:
Conversion of convertible notes payable to common stock8,996 3,038 
Conversion of convertible notes payable to February 2023 Warrants11,040 — 
Conversion of Initial Contract Consideration Convertible Notes Payable to February 2023 Warrants15,092 — 
Conversion of Amended Contract Consideration Convertible Notes Payable to common stock40,638 — 
Issuance of convertible notes payable as consideration for ProFrac Agreements— 79,460 
Issuance cost of stock warrants included in accrued accounts payable— 1,170