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Fair value measurements
3 Months Ended
Mar. 30, 2024
Fair Value Disclosures [Abstract]  
Fair value measurements Fair value measurements
The process for determining fair value has not changed from that described in the Annual Report on Form 10-K for the year ended December 31, 2023.
There were no assets measured at fair value on a recurring basis and there were no liabilities valued at fair value using Level 1 or Level 2 inputs. The following table provides information for assets and liabilities measured at fair value on a recurring basis using Level 3 inputs:
March 30, 2024December 31, 2023
TotalLevel 3TotalLevel 3
Liabilities:
Bioness contingent consideration$18,445 $18,445 $18,150 $18,150 
Total liabilities:$18,445 $18,445 $18,150 $18,150 
Contingent consideration
The Company initially values contingent consideration related to business combinations using a probability-weighted calculation of potential payment scenarios discounted at rates reflective of the risks associated with the expected future cash flows for certain milestones. For other milestones, the Company used a variation of the income approach where revenue was simulated in a risk-neutral framework using Geometric Brownian Motion, a stock price behavior model.
Key assumptions used to estimate the fair value of contingent consideration include projected financial information, market data and the probability and timing of achieving the specific targets. After the initial valuation, the Company generally uses its best estimate to measure contingent consideration at each subsequent reporting period using unobservable Level 3 inputs.
Unobservable inputs
A summary of unobservable Level 3 inputs utilized for the above liabilities are as follows:
Valuation TechniqueUnobservable inputsRange
Bioness contingent considerationDiscounted cash flowPayment discount rate
6.4% - 6.8%
Payment period
2024 - 2025
Significant changes in these assumptions could result in a significantly higher or lower fair value. The contingent consideration reported in the table above resulted from the acquisition of Bioness on March 30, 2021. Contingent consideration is adjusted quarterly based upon the passage of time or the anticipated success or failure of achieving certain milestones. Changes in contingent consideration related to Bioness for the three months ended March 30, 2024 and April 1, 2023 totaled $295 and $287, respectively, and were recorded as the change in fair value of contingent consideration within the consolidated condensed statements of operations and comprehensive loss.