Long-term debt consists of the following:

On December 26, 2017, as part of its initial efforts to spin-off Surefly Inc., the Company entered into a Securities Purchase Agreement with several existing institutional investors the (“Spin-Off Investors”) pursuant to which the Company issued original issue discount Senior Secured Notes in the aggregate principal amount of $5,750,000 in consideration of gross proceeds of $5,000,000 paid by the Spin-Off Investors. The loan was convertible into Surefly Inc. equity upon achieving the spin-off. On June 28, 2018, the Company entered into an amendment agreement with the Spin-Off Investors. The amendment agreement provided that the Senior Secured Notes were amended to provide a maturity date of July 6, 2018. Upon the closing of the Loan Agreement with Arosa, the Company paid off the Senior Secured Notes.

Amortization expense recorded as interest related to the debt issuance costs and unamortized discounts for the Senior Secured Notes was $987,500 for the nine months ended September 30, 2018.

On June 7, 2018, the Company received a short-term loan in the aggregate principal amount of $550,000 from Stephen S. Burns, H. Benjamin Samuels, Gerald Budde and Ray Chess, each an executive officer and/or director of the Company (collectively, the “Related Parties”). The Company used the net proceeds from the transaction for general business and working capital purposes. To evidence the loans, the Company issued the Related Parties promissory notes (the “Related Parties Notes”) in the aggregate principal amount of $550,000. The Related Parties Notes are unsecured obligations of the Company and are not convertible into equity securities of the Company. Principal and interest under the Related Parties Notes are due and payable December 6, 2018, however, in the event that the Company raises in excess of $10,000,000 in equity financing, then the Company will use part of its proceeds to pay off the Related Parties Notes. Under no circumstance may the Related Parties Notes be paid off on or prior to the 91st day following the maturity date of the Senior Secured Notes issued by the Company on December 27, 2017 in the principal aggregate amount of $5,750,000. Interest accrues on the Related Parties Notes at the rate of 12.0% per annum. The Related Parties Notes contain terms and events of default customary for similar transactions.

On July 6, 2018, the Company received a short-term loan in the aggregate principal amount of $500,000 from accredited investors (collectively, the “Loan Parties”), which included Mr. Samuels, a director of the Company. To evidence the loans, we issued the Loan Parties promissory notes (the “Loan Parties Notes”) in the aggregate principal amount of $500,000. The Loan Parties Notes are unsecured obligations of the Company and are not convertible into equity securities of our company. Principal and interest under the Loan Parties Notes is due and payable January 5, 2019, however, in the event that the Company raises in excess of $10,000,000 in equity or debt financing, the Company will use a portion of the proceeds to pay off the Loan Parties Notes. Interest accrues on the Loan Parties Notes at the rate of 12.0% per annum. The Loan Parties Notes contain terms and events of default customary for similar transactions.

The Related Parties Notes and Loan Parties Notes were paid off following the closing of the August 2018 public offering.

On July 6, 2018, the Company, as borrower, entered into a Loan Agreement with a fund managed by Arosa Capital Management LP (“Arosa”), as lender, providing for a term loan (the “Arosa Loan”) in the principal amount of $6,100,000 (the “Loan Agreement”). The maturity date of the Arosa Loan is July 6, 2019 (the “Maturity Date”). The interest rate for the Arosa Loan is 8% per annum payable in quarterly installments commencing October 6, 2018. The Company may prepay the Arosa Loan at any time upon three days written notice.

The Company used the proceeds from the Arosa Loan to satisfy the Senior Secured Loans initially issued December 27, 2017 in the amount of $5,750,000 and a loan in the amount of $350,000 payable to the former owner of the Company’s facility based in Loveland, Ohio.

The Loan Agreement requires the Company to pay Arosa’s expenses including attorney fees. The Loan Agreement also requires the Company to make certain representations and warranties and other agreements that are customary in loan agreements of this type and also includes covenants to raise $10,000,000 in equity prior to September 30, 2018 and to consummate a sale of Surefly, Inc., the Company’s indirect wholly-owned subsidiary resulting in cash proceeds of no less than $20,000,000. The Loan Agreement also contains customary events of default, including non-payment of principal or interest, violations of covenants, bankruptcy and material judgments. The Company’s subsidiaries and Arosa also entered into a Guarantee and Collateral Agreement and Intellectual Property Security Agreement providing that the Company’s obligations to Arosa are secured by substantially all of the Company’s assets. In addition, the Company is required to appoint to the Board of Directors a person designated in writing by Arosa for a period of no less than 12 months.

In accordance with the Loan Agreement, the Company issued Arosa a warrant to purchase 5,000,358 shares of common stock of the Company at an exercise price of $2.00 per share exercisable in cash only for a period of five years. While the Arosa Loan remains outstanding, the Company will be required to issue additional warrants to purchase common stock to Arosa equal to 10% of any additional issuance excluding issuances under an approved stock plan. The additional warrants to purchase common Stock will have an exercise price equal to the lesser of $2.00 or a 5% premium to the price utilized in such financing. Pursuant to the warrant, Arosa may not exercise such warrant if such exercise would result in Arosa beneficially owning in excess of 9.99% of the Company’s then issued and outstanding common stock. On August 2, 2018, after conducting additional due diligence on the Company’s available collateral base, Arosa agreed to enter into the First Amendment to the Loan Agreement with the Company pursuant to which an additional $1,700,000 was loaned to the Company for working capital purposes and general corporate purposes. In addition, various covenants were added or amended including, but not limited to, requiring the Company to satisfy its Mortgage on its Loveland, Ohio facility no later than October 1, 2018, which we paid off in August 2018 with a payment of $1.85 million.

The Company determined that the Arosa Loan and related warrants were freestanding instruments issued together and therefore should be accounted for separately. We determined the warrants did not qualify for equity classification and therefore have applied liability treatment to the instruments. The value of the warrants on the date of the Arosa Loan was determined to be $3,540,542, which was determined using the Black-Scholes method and was recorded as a liability with the offset being recorded as a debt discount, which will be amortized into interest expense over the life of the loan. The liability for the warrants, as well as any future warrant issuances, will be marked to marked quarterly in accordance with liability accounting.

On August 14, 2018, in accordance with the Loan Agreement, we issued a warrant to acquire 1,143,200 shares of common stock at an exercise price of $1.208 warrants to Arosa following the closing of our public offering on August 13, 2018 and the related over-allotment on August 14, 2018.