9. Long-Term Debt

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In March 2019, the Company entered into a loan and security agreement, as amended, with Generate Lending, LLC, providing for a secured term loan facility in the amount of $100 million (the “Term Loan Facility”). In December 2022, the Company fully repaid the outstanding balance of the Term Loan Facility.

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In June 2020, the Company acquired debt as part of its acquisition of United Hydrogen Group Inc. During the three and six months ended June 30, 2023, the Company repaid $5.1 million and $5.4 million of principal related to this outstanding debt, respectively. The outstanding carrying value of the debt was $4.2 million as of June 30, 2023. The remaining outstanding principal on the debt was $6.1 million and the unamortized debt discount was $1.9 million, bearing varying interest rates ranging from 5.6% to 8.3%. The debt is scheduled to mature in 2026. As of June 30, 2023, the principal balance is due at each of the following dates as follows (in thousands):

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