Gain from our investment in affiliates (i.e., Exaro Energy III (“Exaro”)) for the three months ended December 31, 2020 was approximately $40,000, compared to $0.9 million for the three months ended December 31, 2019.
Loss on derivatives for the three months ended December 31, 2020 was approximately $2.9 million. Of this amount, $5.8 million was non-cash, unrealized mark-to-market losses attributable to improvement in benchmark commodity prices at the end of the current quarter compared to the benchmark prices at the end of the third quarter of 2020, offset in part by $2.9 million in realized gains on derivative settlements during the current quarter. Loss on derivatives for the three months ended December 31, 2019 was approximately $4.4 million, of which $4.9 million was non-cash, unrealized mark-to-market losses, while the remaining $0.5 million were realized gains.
2020/2021 Capital Program & Capital Resources
Capital costs for the three months ended December 31, 2020 were approximately $0.4 million, of which $0.3 million was related to costs and evaluations of potential offshore exploratory prospects.
Our 2021 capital expenditure budget is currently planned to be between $13 - $16 million for capital workovers, facility upgrades, waterflood development and selected new well drills; however, due to our ongoing evaluation of future development for our recently acquired properties from the Mid-Con Acquisition and the Silvertip Acquisition, and the regulatory and operational factors being considered in developing a timeline for our next well in our GOM program, our capital expenditure program will continue to be evaluated for revision during the year. We believe that we will have the financial resources to increase the currently planned 2021 capital expenditure budget, when and if deemed appropriate, including as a result of changes in commodity prices, economic conditions or operational factors.
As of December 31, 2020, we had approximately $9.0 million outstanding under the Company’s Credit Agreement, $1.9 million in an outstanding letter of credit and $1.4 million in cash. The borrowing base was $75 million as of December 31, 2020, with a borrowing availability of $64.1 million.
On October 25, 2020, the Company and Mid-Con entered into the Agreement and Plan of Merger for the Mid-Con Acquisition providing for the Company’s acquisition of Mid-Con in an all-stock merger transaction in which Mid-Con became a direct, wholly owned subsidiary of Contango. The Mid-Con Acquisition closed on January 21, 2021 at which time the MSA with Mid-Con was terminated. A total of 25,409,164 shares of Contango common stock were issued at the closing of the Mid-Con acquisition. Concurrently with the announcement of the Mid-Con Acquisition, we announced the execution of an agreement with a select group of institutional and accredited investors to sell 26,451,988 shares of the Company’s common stock. On October 27, 2020, we completed the private placement offering for net proceeds of approximately $38.8 million. The proceeds were used for the Mid-Con Acquisition and for general corporate purposes, including the repayment of debt outstanding under our Credit Agreement. See Note 1 – “Organization and Business” and Note 4 – “Acquisitions and Dispositions” in our recently filed Form 10-K for the year ended December 31, 2020 for further information.
On October 30, 2020, we entered into the Third Amendment to the Credit Agreement (the “Third Amendment”) under which the Company’s borrowing base was increased from $75 million to $130 million, effective upon the closing of the Mid-Con Acquisition. The Third Amendment provides for, among other things, a $10 million automatic reduction in the borrowing base on March 31, 2021. The next regularly scheduled borrowing base redetermination is on or before May 1, 2021. The borrowing base may also be adjusted by certain events, including the incurrence of any senior unsecured debt, material asset dispositions or liquidation of hedges in excess of certain thresholds. The Credit Agreement matures on September 17,