Debt

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Debt

15. Debt

2021 Bond Issuance

On April 15, 2021, on behalf of Gevo NW Iowa RNG, LLC, the Iowa Finance Authority (the “Authority”) issued $68,155,000 of its non-recourse Solid Waste Facility Revenue Bonds (Gevo NW Iowa RNG, LLC Renewable Natural Gas Project), Series 2021 (Green Bonds) (the “2021 Bonds”) for NW Iowa RNG. The bond proceeds were used as a source of construction financing alongside equity from the Company. The bonds were issued under a Trust Indenture dated April 1, 2021 (the “Indenture”) between the Authority and Citibank, N.A. as trustee (the “Trustee”). The 2021 Bonds mature April 1, 2042. The bonds bear interest at 1.5% per annum during the Initial Term Rate Period, (as defined in the Indenture), payable semi-annually on January 1 and July 1 of each year. The effective interest rate is 1.1%. The bonds are supported by the $71.2 million Bond Letter of Credit; see Note 7, Restricted Cash. The Trustee can draw sufficient amounts on the Bond Letter of Credit to pay the principal and interest until the first mandatory tender date of April 1, 2024. The bonds are callable and re-marketable on or after October 1, 2022. If the bonds have not been called and re-marketed by the first mandatory tender date, the Trustee may draw on the Bond Letter of Credit to repay the bonds in their entirety at the purchase price. As of December 31, 2023, no amounts have been drawn under the Bond Letter of Credit.

The 2021 Bonds were issued at a premium of $0.8 million and debt issuance costs were $3.0 million. The bond debt is classified as current debt and is presented net of the premium and issuance costs, which are being amortized over the life of the bonds using the interest method. As of December 31, 2023, and 2022, the premium balance and the debt issuance cost net of amortization were $0.1 million, $0.4 million, $0.3 million and $1.3 million, respectively.

Loans Payable 

In April 2020, the Company and Agri-Energy each entered into a loan agreement with Live Oak Banking Company, pursuant to which the Company and Agri-Energy obtained loans from the SBA PPP totaling $1.0 million in the aggregate (the “SBA Loans”).

In April 2021, the balance of $0.5 million of the Company’s and $0.1 million of Agri-Energy’s loans and accrued interest obtained through the SBA PPP were forgiven. The remaining SBA Loan for Agri-Energy totals $0.3 million, bears interest at 1.0% per annum and matures in April 2025. Monthly payments of $8,230, including interest, began on June 5, 2021 and are payable through April 2025.

The summary of the Company’s long-term debt is as follows (in thousands) as of:

			Year Ended December 31,
	Interest Rate	Maturity Date	2023		2022
2021 Bonds, net	1.5%	April 2042	$	67,967	$	67,223
SBA Loans	1.0%	April 2025		119		224
Equipment	4% to 5%	December 2023 to December 2024		32		94
Total debt				68,118		67,541
Less: current portion				(68,097)		(159)
Non-current portion			$	21	$	67,382

Future payments for the Company’s long-term debt are as follows (in thousands):

Year Ending December 31,	Total Debt
2024	$	68,089
2025		29
Total debt	$	68,118