Our total revenues increased $25.3 million, or 27.5%, to $117.4 million for the year ended December 31, 2019, compared to $92.1 million for the year ended December 31, 2018 primarily as a result of increased distributions of our coflex
®
Interlaminar Stabilization
®
implants, partially offset by the abandonment of the map3
®
implant. Excluding our coflex
®
Interlaminar Stabilization
®
implants, our spine implants decreased $5.0 million, or 5.4%, to $87.1 million for the year ended December 31, 2019 compared to $92.1 million for the year ended December 31, 2018.
Costs of Processing and Distribution.
Costs of processing and distribution decreased $0.8 million, or 2.4%, to $32.8 million, or 27.9% of revenue, for the year ended December 31, 2019, from $33.6 million, or 36.5% of revenue, for the year ended December 31, 2018. Adjusted for the impact of purchase accounting
step-up
of $3.2 million and $0.6 million for the years ended December 31, 2019 and 2018, respectively, and an inventory
write-off
of $6.6 million related to the abandonment of our map3
®
implant for the year ended December 31, 2018, cost of processing and distribution increased $3.2 million, or 12.1%, to $29.6 million, or 25.2% of revenue, for the year ended December 31, 2019, compared to $26.4 million, or 28.7% of revenue, for the year ended December 30, 2018. The increase in costs of processing and distribution was primarily due to the increased cost of processing and distribution associated with the inclusion of the sale of our coflex
®
Interlaminar Stabilization
®
implants as a result of the acquisition of Paradigm in 2019.
Marketing, General and Administrative Expenses
. Marketing, general and administrative expenses increased $37.2 million, or 37.9%, to $135.4 million for the year ended December 31, 2019, compared to $98.2 million for the year ended December 31, 2018. Marketing, general and administrative expenses increased as a percentage of revenues from 106.6% for the year ended December 31, 2018 to 115.3% for the year ended December 31, 2019. The increase was primarily due to the Paradigm acquisition resulting in incremental headcount, marketing and administrative related expenses and increased legal cost related to patent litigation, all totaling $36.2 million.
Research and Development Expenses.
Research and development expenses increased $2.4 million, or 16.8%, to $16.8 million for the year ended December 31, 2019, compared to $14.4 million for the year ended December 31, 2018. Research and development expenses decreased as a percentage of revenues from 15.6% for the year ended December 31, 2018, to 14.3% for the year ended December 31, 2019. The increase in research and development was in support of our strategic initiative to accelerate growth resulting in increased investment in new product development and clinical studies.
Gain on Acquisition Contingency.
Gain on acquisition contingency was $76.0 million for the year ended December 31, 2019. The gain on acquisition contingency was the result of an adjustment to our estimate of obligation for future milestone payments on the Paradigm and Zyga Technology, Inc. (“Zyga”) acquisitions. There was no gain on acquisition contingency for the year ended December 31, 2018.
Asset Impairment and Abandonments.
Asset impairment and abandonments was $97.3 million for the year ended December 31, 2019, related to the impairment of long-lived and other intangible assets compared to $5.1 million for the year ended December 31, 2018, primarily related to the abandonment of the map3
®
implant. During 2019, the Company concluded, through the ASC 350
, Intangibles - Goodwill and other
(“ASC 350”) valuation testing, that factors existed at
year-end
indicating that long-lived assets were indicating impairment. As a result, for the year ended December 31, 2019, we recorded impairment charges to other intangible assets totaling $85.1 million, to property, plant and equipment, totaling $11.7 million, and to
assets totaling $0.2 million. In addition, for the year ended December 31, 2019, another $0.3 million in other intangible assets were disposed of separately from the ASC 350 valuation testing.
Goodwill impairment was $140.0 million for the year ended December 31, 2019, which was recorded as a result of the change in segment structure. There was no goodwill impairment for the year ended December 31, 2018.