We entered into a 3-year, $5.0 million revolving line of credit facility with Citizens Bank National Association (the “Bank") to fund general working capital needs and acquisitions. We amended this facility on May 11, 2018 with the Amended and Restated Credit and Security Agreement (the “Credit Agreement" or the “Credit Facility”) to (a) expand the $5.0 million revolving line of credit to include a letter of credit sub-facility and not subject to a borrowing base ("the RLOC") and (b) to add a $25.0 million term loan facility, available to finance permitted acquisitions over the following 18 months. The credit facility is subject to certain financial covenants and reporting requirements, matures in five years and bear interest at the one-month USD LIBOR, plus a margin that varies depending on our overall leverage ratio. The RLOC has required monthly payments of only interest, with principal due at maturity, while our term loan draws require monthly payments of principal and interest, based on an amortization schedule. We are not required to maintain a restricted cash collateral account at Citizens Bank for the RLOC. Our obligations under the Credit Agreement are guaranteed by our wholly-owned subsidiaries Hyperspring, Absolute, True North, DP Engineering and by any future material domestic subsidiaries (collectively, "the Guarantors").
On June 28, 2019, we entered into the Fifth Amendment and Reaffirmation Agreement, which changed our fixed charge coverage ratio from 1.25 to (i) 2.75 to 1.00 for the period ending March 31, 2020; (ii) 2.50 to 1.00 for the periods ending June 30, 2020 and September 30, 2020; (iii) 2.25 to 1.00 for the periods ending December 31st, March 31st, June 30th and September 30th, thereafter.
On January 8, 2020, due to an expected violation of our covenants, we entered into the Sixth Amendment and Reaffirmation Agreement and effective on December 31, with our Bank to relax the fixed charge coverage ratio and leverage ratio and delay testing of both financial covenants. We agreed to an additional covenant, requiring us to maintain a consolidated Adjusted EBITDA target of $4.25 million, tested quarterly as of December 31, 2019, March 31, 2020 and June 30, 2020. Further, we agreed to maintain a minimum USA liquidity of at least $5.0 million in the aggregate, tested bi-weekly as of the fifteenth and the last day of each month, beginning on December 31, 2019 and until June 30, 2020. In addition to the revised covenants, we agreed to make accelerated principal payments of $3.0 million on January 6, 2020; $1.0 million on March 31, 2020; and $1.0 million on June 30, 2020.
On April 17, 2020, we entered into the Seventh Amendment and Reaffirmation Agreement and effective March 31, 2020, which requires us to maintain a minimum fixed charge coverage ratio of 1.25 to 1.00, tested quarterly as of the last day of each quarter, beginning with the quarter ending June 30, 2021. In addition, we agreed to not exceed a maximum leverage ratio, tested quarterly as of the last day of each quarter and beginning with the quarter ending September 30, 2020 as follows: (i) 3.00 to 1.00 for the period ending on September 30, 2020; (ii) 2.50 to 1.00 for the period ending on December 31, 2020; and (iii) 2.25 to 1.00 for the period ending on March 31, 2021 and for the periods ending December 31, March 31, June 30 and September 30, thereafter. We additionally agreed to make accelerated principal payments of $0.75 million on April 17, 2020 and $0.5 million on June 30, 2020.
We have the option to refinance the term loan facility if certain requirements are met, including certain covenant thresholds.
Revolving Line of Credit
We intend to continue using the RLOC for short-term working capital needs and the issuance of letters of credit in connection with business operations. Letter of credit issuance fees range between 1.25% and 2.00% depending on our overall leverage ratio, and we pay an unused RLOC fee quarterly based on the average daily unused balance.
At March 31, 2020, we had borrowed $3.5 million under the RLOC, and there were four letters of credit totaling $1.2 million outstanding to certain of our customers. The amount available at March 31, 2020, after consideration of letters of credit, was approximately $0.3 million.
As discussed in Note 4, we acquired DP Engineering on February 15, 2019 for approximately $13.5 million in cash and borrowed $14.3 million to finance the acquisition. The loan matures in five years and bears interest at the adjusted USD LIBOR, plus a margin ranging between 2.00% and 2.75% depending on our overall leverage ratio. There were no debt issuance costs or loan origination fees associated with this transaction.
Additionally, to fund the acquisition of True North, we borrowed $10.3 million on May 11, 2018, $0.5 million of which was repaid to the Bank on the same day. The loan matures in five years and bears interest at the adjusted one-month USD LIBOR, plus a margin ranging between 2.00% and 2.75% depending on our overall leverage ratio. We incurred $70 thousand of debt issuance costs and $75 thousand of loan origination fees related to this transaction. Debt issuance costs and loan origination fees are reported as a direct deduction from the carrying amount of the loan and amortized over the term of the loan using the effective interest method.
Possible violation of debt covenants during Fiscal 2020
As discussed in Note 1, substantial doubt has been raised regarding our ability to continue as a going concern due to a probable debt covenant violation and have classified our debt as current in our consolidated balance sheets as of March 31, 2020 and December 31, 2019.
The Credit Agreement contains customary covenants, as described above, and restrictions typical for a financing of this type, that, among other things, restricts our ability to incur additional debt, pay dividends, make distributions, make certain investments and acquisitions, repurchase our stock and prepay certain indebtedness, create liens, enter into agreements with affiliates, modify the nature of our business, enter into sale-leaseback transactions, transfer and sell material assets and merge or consolidate. Non-compliance with one or more of the covenants and restrictions after any applicable grace period could result in the obligations under the Credit Agreement becoming immediately due and payable and termination of the facilities. If an event of default under the Credit Agreement occurs and is continuing, then the Bank may declare the obligations under the Credit Agreement to be immediately due and payable and may terminate the credit facilities.