
(in thousands)	December 31, 2020		December 31, 2019
3.0% note payable for a four-year loan for the purchase of a truck	$	—	$	18
Real Estate Note	8,125		8,297
	8,125		8,315
Less unamortized debt issuance costs	(99)		(119)
Less current portion of long-term debt	(182)		(178)
Long-term debt, net, excluding operating leases and finance leases	$	7,844	$	8,018

On October 1, 2018, the Operating Company, as the borrower, entered into an amended and restated revolving credit note (the “line of credit”) with Fifth Third Bank, for a $15 million revolving credit loan with a maturity date of August 23, 2020. On April 5, 2019, the Operating Company, as the borrower, entered into a second amendment to the first amended and restated credit agreement, dated October 1, 2018 (the “line of credit”) with Fifth Third Bank, for a $15.0 million revolving credit loan with a maturity date of August 23, 2020. In August 2020, the maturity date of the line of credit was further extended to November 30, 2020. This line of credit was not renewed on November 30, 2020. There were no borrowings outstanding on the line of credit at December 31, 2020 and 2019.

On October 1, 2018, one of the Operating Company’s wholly-owned subsidiaries closed on the purchase of a building for $10 million, which serves as our corporate headquarters. The purchase was financed through a real estate term note (the “Real Estate Note”) in the principal amount of $8.5 million, with one of the Operating Company’s wholly-owned subsidiaries as the borrower and Fifth Third Bank as the lender. Principal amounts plus any accrued interest at a rate of LIBOR plus 2.39% are due monthly. The Real Estate Note contains customary covenants and restrictions, including, without limitation, covenants that require us to comply with laws, restrictions on our ability to incur additional indebtedness, and various customary remedies for the lender following an event of default, including the acceleration of repayment of outstanding amounts under the Real Estate Note and execution upon the collateral securing obligations under the Real Estate Note. Our obligations under the Real Estate Note are secured by a mortgage on the property. Our Real Estate Note is subject to an interest rate swap contract. See “Note 4—Fair Value of Financial Instruments.”

LIBOR is expected to be discontinued and replaced after 2021 and the credit facility has a maturity date beyond that time. There can be no assurances as to what the alternative base rate will be in the event that LIBOR is discontinued, and we can provide no assurances whether that base rate will be more or less favorable than LIBOR. We intend to monitor the developments with respect to the phasing out of LIBOR after 2021 and work with our lenders to ensure that any transition away from LIBOR will have minimal impact on our financial condition but can provide no assurances regarding the impact of LIBOR discontinuation.

In December 2018, the Operating Company issued an aggregate of $40.2 million in convertible promissory notes (the “convertible notes”) and received net cash proceeds of $38.9 million. In January 2019, the Operating Company issued an additional $8.1 million in convertible notes and received net cash proceeds of $6.5 million. During the three months ended March 31, 2019, we recognized debt issuance costs of $0.4 million associated with the issuance of January 2019 convertible notes within "interest expense," and we also recognized an expense related to the change in fair value of the convertible notes of $12.1 million within "other income (expense), net" in our consolidated statement of operations and comprehensive loss. The