Business Combinations On April 6, 2017, we acquired substantially all of the net assets of Residential Control Systems, Inc. ("RCS"), a U.S.-based designer and manufacturer of energy management and control products for the residential, small commercial and hospitality markets. The purchase price of $12.6 million was comprised of $8.9 million in cash and $3.7 million of contingent consideration. Additionally, we incurred $0.1 million in acquisition costs, consisting primarily of accounting related expenses, which are included within selling, general and administrative expenses for the year ended December 31, 2017. The acquisition of these assets allows us to expand our product offering of home sensing, monitoring and control solutions to include smart thermostat, sensing and monitoring products previously sold and marketed by RCS. Our consolidated statements of operations for the years ended December 31, 2018 and 2017 include net sales of $5.1 million and $3.5 million , respectively; and net losses of $0.2 million and $0.4 million , respectively, attributable to RCS. Contingent Consideration We are required to make additional earnout payments of up to $10.0 million upon the achievement of certain operating income levels attributable to RCS over the period commencing on the acquisition date through June 30, 2022. The amount of contingent consideration is calculated at the end of each calendar year and is based on the agreed upon percentage of operating income as defined in the Asset Purchase Agreement (the "APA"). Operating income is calculated using certain revenues, costs and expenses directly attributable to RCS as specified in the APA. At the acquisition date, the value of earnout contingent consideration was estimated using a valuation methodology based on projections of future operating income calculated in accordance with the APA. Such projections were then discounted using an average discount rate of 24.8% to reflect the risk in achieving the projected operating income levels as well as the time value of money. The fair value measurement of the earnout contingent consideration was based primarily on significant inputs not observable in an active market and thus represents a Level 3 measurement as defined under U.S. GAAP. At December 31, 2017 , the fair value of the earnout contingent consideration attributable to RCS was $2.3 million . During the year ended December 31, 2018, the fair value of earnout contingent consideration attributable to RCS decreased $1.6 million to $0.7 million . Changes in the fair value of earnout contingent consideration primarily reflect adjustments to the timing and amount of payments as well as the related accretion driven by the time value of money. These adjustments are recorded within selling, general and administrative expenses. At December 31, 2018 , the fair value of earnout contingent consideration attributable to RCS is presented within long-term contingent consideration in our consolidated balance sheet. Purchase Price Allocation Using the acquisition method of accounting, the acquisition date fair value of the consideration transferred was allocated to the net tangible and intangible assets acquired and liabilities assumed based on their estimated fair values on the acquisition date. The excess of the purchase price over the estimated fair value of net assets acquired is recorded as goodwill. The goodwill is expected to be deductible for income tax purposes. Management's purchase price allocation was the following: (In thousands) Estimated Lives Fair Value Accounts receivable $ 429 Inventories 1,508 Prepaid expenses and other current assets 7 Property, plant and equipment 1-4 years 14 Current liabilities (408 ) Net tangible assets acquired 1,550 Trade name 8 years 400 Customer relationships 10 years 5,000 Order backlog 1 year 150 Goodwill 5,494 Total purchase price 12,594 Less: Contingent consideration (3,700 ) Cash paid $ 8,894 Management's determination of the fair value of intangible assets acquired was based primarily on significant inputs not observable in an active market and thus represent Level 3 fair value measurements. The fair value assigned to the RCS trade name intangible asset was determined utilizing a relief from royalty method. Under the relief from royalty method, the fair value of the intangible asset is estimated to be the present value of the royalties saved because the company owns the intangible asset. Revenue projections and estimated useful life were significant inputs into estimating the value of the RCS trade name. The fair value assigned to the RCS customer relationships and order backlog intangible assets were determined utilizing a multi-period excess earnings approach. Under the multi-period excess earnings approach, the fair value of the intangible asset is estimated to be the present value of future earnings attributable to the asset and utilizes revenue and cost projections, including an assumed contributory asset charge. The trade name, customer relationships and order backlog intangible assets are expected to be deductible for income tax purposes. Pro Forma Results (Unaudited) The following unaudited pro forma financial information presents the combined results of our operations and the operations of RCS as if the RCS acquisition had occurred on January 1, 2016. This unaudited pro forma financial information is not intended to represent or be indicative of the consolidated results of operations that would have been achieved had the acquisition actually been completed as of January 1, 2016, and should not be taken as a projection of the future consolidated results of our operations. Year Ended December 31, (In thousands, except per-share amounts) 2018 2017 Net sales $ 680,241 $ 696,352 Net income (loss) 11,952 (10,538 ) Net income (loss) attributable to Universal Electronics Inc. 11,952 (10,538 ) Basic earnings (loss) per share attributable to Universal Electronics Inc. 0.86 (0.73 ) Diluted earnings (loss) per share attributable to Universal Electronics Inc. 0.85 (0.73 ) For purposes of determining pro forma net income (loss) attributable to Universal Electronics Inc., adjustments were made to all periods presented in the table above. The pro forma net income (loss) and net income (loss) attributable to Universal Electronics Inc. assume that amortization of acquired intangible assets began at January 1, 2016 rather than on April 6, 2017. The result is a net decrease in amortization expense of $38 thousand and a net increase in amortization expense of $25 thousand for the years ended December 31, 2018 and 2017 , respectively. Additionally, acquisition costs totaling $0.1 million are excluded from pro forma net income (loss) and net income (loss) attributable to Universal Electronics Inc. for the year ended December 31, 2017 . All adjustments have been made net of their related tax effects.