8.         Goodwill and Intangible Assets

On December 5, 2022, the Company acquired the Human Motion Control ("HMC") business unit from Parker (the "HMC Acquisition"). The assets acquired from the business unit included intellectual property rights associated with the Ekso Indego Personal, Ekso Indego Therapy, Nomad, and future products in the orthotics and prosthetics space.

Goodwill

The Company accounted for the acquisition as a business combination in accordance with ASC 805, Business Combinations, by applying the acquisition method, and accordingly, the purchase price was allocated to the assets acquired and liabilities assumed based on their fair values at the acquisition date. The excess of the purchase price over the net assets acquired of $431 was recorded as goodwill. The goodwill recognized is attributed primarily to expected synergies of HMC with the Company.

The Company determined no impairment existed for goodwill for the three months ended March 31, 2025 and 2024.

Intangible Assets

The following table summarizes the components of gross intangible assets, accumulated amortization, and net carrying values for definite- and indefinite-lived intangible asset balances as of March 31, 2025 and December 31, 2024:

Definite-lived intangible assets are amortized over their estimated lives using the straight-line method, which is estimated as eight years for developed technology, 12 years for intellectual property and eight years for customer relationships. The acquired trade name was estimated to have an indefinite life, and consequently, no amortization expense was recorded.

The Company had a Knee License Agreement with Vanderbilt University ("Vanderbilt") to maintain exclusive rights to patents on the Company's behalf (the "License Agreement"). On April 16, 2025, the Company executed a Termination Agreement with Vanderbilt of the License Agreement (the "Termination Agreement"). Per the Termination Agreement, the Company is no longer required to pay 3.75% of net sales for its Swing-Assist Microprocessor-Controlled Knee ("SA-MPK") licensed patent products and a minimum annual royalty of $75 due on or before July 31, 2028 and $100 per year thereafter until February 15, 2041. Under the Termination Agreement, should, to the extent Vanderbilt successfully licenses the rights of the SA-MPK technology to a third-party, Vanderbilt will pay the Company 50% of Vanderbilt's share of any net revenues attributable to the rights received from such future license agreement until $100 has been paid to the Company. As a result of the overall uncertainty of the future revenues, the Company performed an impairment assessment of the intangible asset. In estimating the fair value of the asset, the Company utilized the undiscounted cash flow model, dependent on the primary assumption of forecasted revenues from the quoted market price of the Termination Agreement, which led to a $180 impairment loss recognized for the asset, reducing the asset balance to $0. The impairment loss is included as a component of operating expenses, under the caption "General and administrative," in the condensed consolidated statement of operations and comprehensive loss. The Company determined no impairment existed for its other intangible assets for the three months ended March 31, 2025 and 2024.

The estimated future amortization expenses related to definite-lived intangible assets as of March 31, 2025 were as follows:

Amortization expense related to the acquired definite-lived intangible assets was $82 and $77 for the three months ended March 31, 2025 and 2024, respectively, and was included as a component of cost of revenue ($78 and $73, respectively) and operating expenses ($4 and $4, respectively) in the condensed consolidated statement of operations and comprehensive loss.