3. Business Acquisition On November 13, 2018, the Company acquired all of the intellectual property and related assets of the OptoSeis  fiber optic sensing technology business. The assets of the OptoSeis  business are included in the Companys Oil and Gas Markets business segment. The acquisition purchase price consisted of cash at closing of approximately $1.8 million and contingent earn-out payments of up to $23.2 million over a five-and-a half year period. The contingent cash payments will be derived from eligible revenue generated during the earn-out period from product and services. In connection with the OptoSeis  acquisition, the Company recorded goodwill of $0.7 million (deductible for tax purposes), other intangible assets of $3.7 million, fixed assets of $1.7 million and has established an initial contingent earn-out liability of $4.3 million. The contingent earn-out payments will be derived from certain eligible revenue generated during the five-and-a-half year earn-out period. Legal costs of $0.2 million related to the OptoSeis  acquisition are included in selling, general and administrative expenses. Due to the limited amount of time since the acquisition transaction, the valuation of the OptoSeis  assets and liabilities and the determination of the fair value of the contingent consideration are considered by the Company as preliminary and subject to change. During the nine months ended June 30, 2019, the estimated fair value of the acquired OptoSeis  assets changed, including a $1.8 million addition to machinery and equipment, which was offset by a $1.0 million decrease in goodwill and a $0.8 million decrease in other intangible assets.