Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	3. Related Party Transactions Cercacor Laboratories, Inc. (Cercacor) is an independent entity that was spun off from the Company to its stockholders in 1998. Joe Kiani, the Company’s Chairman and Chief Executive Officer (CEO), is also the Chairman and CEO of Cercacor. Effective as of January 3, 2016, in connection with changes in the capital structure of Cercacor, the Company determined that Cercacor was no longer required to be consolidated. Although the Company believes that Cercacor continues to be considered a variable interest entity, the Company has determined that it is no longer the primary beneficiary of Cercacor as it does not have the power to direct the activities of Cercacor that most significantly impact Cercacor’s economic performance and has no obligation to absorb Cercacor’s losses. The Company is a party to the following agreements with Cercacor: •Cross-Licensing Agreement - The Company and Cercacor are parties to a cross-licensing agreement (Cross-Licensing Agreement), which governs each party’s rights to certain intellectual property held by the two companies. The Company is subject to certain annual minimum aggregate royalty obligations for use of the rainbow® licensed technology. The current annual minimum royalty obligation is $5.0 million. Aggregate liabilities payable to Cercacor arising under the Cross-Licensing Agreement were $16.9 million, $13.5 million and $13.3 million for the years ended December 31, 2022, January 1, 2022 and January 2, 2021, respectively. The Company had sales to Cercacor in the amount of $0.2 million, $0.1 million and less than $0.1 million for the years ended December 31, 2022, January 1, 2022 and January 2, 2021, respectively. •Administrative Services Agreement - The Company is a party to an administrative services agreement with Cercacor (G&A Services Agreement), which governs certain general and administrative services that the Company provides to Cercacor. Amounts charged by the Company pursuant to the G&A Services Agreement were $0.4 million, $0.3 million and $0.3 million for the years ended December 31, 2022, January 1, 2022 and January 2, 2021, respectively. •Lease Agreements - Effective December 2019, the Company entered into a new lease agreement with Cercacor for approximately 34,000 of square feet of office, research and development space at one of the Company’s owned facilities in Irvine (Cercacor Lease). The term of the Cercacor Lease expires on December 31, 2024. The Company recognized approximately $1.2 million, $1.2 million and $1.1 million of lease income for the years ended December 31, 2022, January 1, 2022 and January 2, 2021, respectively. Net amounts due to Cercacor were approximately $3.8 million and $3.5 million as of December 31, 2022 and January 1, 2022, respectively. The Company’s CEO is also the Chairman of the Masimo Foundation for Ethics, Innovation and Competition in Healthcare (Masimo Foundation), a non-profit organization that was founded in 2010 to provide a platform for encouraging ethics, innovation and competition in healthcare. In addition, the Company’s Executive Vice President (EVP), Chief Financial Officer (CFO) serves as the Treasurer of the Masimo Foundation and the Company’s EVP, General Counsel and Corporate Secretary serves as the Secretary for the Masimo Foundation. For the fiscal years ended December 31, 2022, January 1, 2022 and January 2, 2021, the Company made cash contributions of approximately $1.0 million, $0.0 million and $1.5 million, respectively, to the Masimo Foundation. In addition, for each of the years ended December 31, 2022, January 1, 2022 and January 2, 2021, the Company made various in-kind contributions to the Masimo Foundation, mainly in the form of donated administrative services. The Company’s CEO is also a co-founder and a member of the board of directors of Like Minded Media Ventures (LMMV), a team of storytellers that create content focused in the areas of true stories, social causes and science. LMMV creates stories with a multi-platform strategy, bridging the gap between film, television, digital and social media. In 2020, the Company entered into a marketing service agreement with LMMV for audiovisual production services promoting brand awareness, including television commercials and digital advertising. During the fiscal years ended December 31, 2022 and January 1, 2022, the Company incurred $1.4 million and less than $0.1 million in marketing expenses to LMMV under the marketing service agreement, respectively. During the fiscal year ended January 2, 2021, the Company incurred no marketing expenses to LMMV under the marketing service agreement. At December 31, 2022 and January 1, 2022, there were no amounts due to LMMV for services rendered. During the second quarter of 2021, the Company entered into a software license and professional services agreement with Like Minded Labs (LML), a subsidiary of LMMV. Pursuant to the software license agreement, LML granted the Company a perpetual, non-exclusive and fully paid-up right and license to integrate LML’s software into the Company’s products in exchange for a $3.0 million one-time license fee. Pursuant to the professional services agreement, LML will provide professional services to the Company, including the development of custom software intended to support the integration of the licensed software into the Company’s products, as well as future support services upon the Company’s acceptance of deliverables. In July 2021, the Company entered into a patent purchase and option agreement with Vantrix Corporation (Vantrix), an acquiree of LML, for certain patents for $0.5 million, and the right to purchase two pools of additional patents from Vantrix for an exercise fee of up to $1.1 million. The agreements with LML and Vantrix include sublicensing provisions whereby the software and patents are licensed back to LML or Vantrix, respectively, for further advancement of the technologies. The Company maintains an aircraft time share agreement, pursuant to which the Company has agreed from time to time to make its aircraft available to the Company’s CEO for lease on a time-sharing basis. The Company charges the Company’s CEO for personal use based on agreed upon reimbursement rates. During the fiscal years ended December 31, 2022, January 1, 2022 and January 2, 2021, the Company charged the Company’s CEO $0.1 million, $0.1 million and less than $0.1 million, respectively, related to such reimbursements.