compensation from customers. Additionally, most fuel surcharges are based on the average fuel price as published by the DOE for the week prior to the shipment, meaning the Company typically bills customers in the current week based on the previous week’s applicable index. Accordingly, in times of increasing fuel prices, the Company does not recover as much as it is currently paying for fuel. In periods of declining prices, for a short period of time the inverse is true. Overall, for three and six months ended June 30, 2020 and 2019, average diesel fuel prices per gallon as reported by the DOE, decreased 22.2% and 12.8%, compared to the same periods in 2019.
As of June 30, 2020, the Company did not have any long-term fuel purchase contracts, and has not entered into any fuel hedging arrangements.
Equity
As of June 30, 2020, the Company had total stockholders’ equity of $75.5 million and total debt and lease liabilities of $189.5 million, resulting in a total debt, less cash, to total capitalization ratio of 71.5% compared to 70.9% as of December 31, 2019.
Purchases and Commitments
The Company routinely monitors equipment acquisition needs and adjusts purchase schedules from time to time based on analysis of factors such as new equipment prices, the condition of the used equipment market, demand for freight services, prevailing interest rates, technological improvements, fuel efficiency, equipment durability, equipment specifications, operating performance and the availability of qualified drivers.
As of June 30, 2020, the Company had no noncancellable commitments for the acquisition of revenue equipment.
During July 2020, the Company entered into an agreement to take delivery of 189 tractors through a lease agreement.
Liquidity and Capital Resources
USA Truck’s business has required, and will continue to require, significant capital investments. In the Company’s Trucking segment, where capital investments are the most substantial, the primary investments are in revenue equipment and to a lesser extent, in technology and working capital. In the Company’s USAT Logistics segment, the primary investments are in technology and working capital. USA Truck’s primary sources of liquidity have been funds provided by operations, borrowings under the Company’s Credit Facility, sales of used revenue equipment, and proceeds from finance and operating leases. Based on expected financial conditions, net capital expenditures, results of operations and related net cash flows and other sources of financing, management believes the Company’s sources of liquidity to be adequate to meet current and projected needs.
The Credit Facility contains a single financial covenant, which requires a consolidated fixed charge coverage ratio of at least 1.0 to 1.0 that is triggered in the event excess availability under the Credit Facility falls below 10% of the lenders’ total commitments. Also, certain restrictions regarding the Company’s ability to pay dividends, make certain investments, prepay certain indebtedness, execute share repurchase programs and enter into certain acquisitions and hedging arrangements are triggered in the event excess availability under the Credit Facility falls below 20% of the lenders’ total commitments.
As of June 30, 2020, the Company had $7.4 million in letters of credit outstanding and had approximately $38 million available to borrow under the Credit Facility. Net of cash, debt represented 71.5% of total capitalization. Fluctuations in the outstanding balance and related availability under the Credit Facility are driven primarily by cash flows from operations and the timing and nature of property and equipment additions that are not funded through other sources of financing, as well as the nature and timing of receipt of proceeds from disposals of property and equipment.
On April 20, 2020, the Company permanently reduced the revolving credit commitment under the Credit Agreement by $55.0 million such that the revolving credit commitment is $170.0 million. The reduction in the revolving credit commitment brought the Company’s excess availability above the 20% threshold for restrictions by lowering the threshold to $34.0 million. This change is anticipated to reduce the fees paid by the Company in connection with such commitment by approximately $0.1 million annually.