Acquisitions	6 Months Ended
Jun. 29, 2013
Business Combinations [Abstract]
Acquisitions	4. Acquisitions *Spire Semiconductor (currently Masimo Semiconductor)* On March 9, 2012, the Company acquired substantially all of the assets and certain liabilities of Spire Semiconductor, LLC, or Spire, a maker of advanced light emitting diode and other advanced component-level technologies. In 2012, Spire Semiconductor was renamed Masimo Semiconductor, Inc., which is a wholly-owned subsidiary of Masimo Corporation. The acquisition gave the Company an advanced ability to develop custom components, accelerate development cycles, and optimize future product costs. Masimo Semiconductor, based in New Hampshire, specializes in wafer epitaxy, foundry services and device fabrication for biomedical, telecommunications, consumer products and other markets. Under the acquisition agreement, the Company paid $7.2 million and assumed $1.2 million of Spire’s liabilities. Simultaneous with this asset acquisition, the Company entered into a lease agreement with a related party to Spire to lease manufacturing and office space in New Hampshire through March 2017. All the assets and liabilities acquired from Spire as of March 9, 2012, and Masimo Semiconductor’s operating results since the acquisition date, have been included in these condensed consolidated financial statements. Pro forma results of operations for this acquisition were not presented because the effect of this acquisition was not material to the Company’s financial condition or results of operations. *Phasein (currently Masimo Sweden)* On July 27, 2012, the Company acquired PHASEIN AB, or Phasein, a developer and manufacturer of ultra-compact mainstream and sidestream capnography and gas monitoring technologies. In 2013, Phasein was renamed Masimo Sweden. The acquisition of Phasein’s technologies complements the Company’s breakthrough innovations for patient monitoring with a portfolio of products ranging from OEM solutions for external “plug-in-and-measure” capnography and gas analyzers and integrated modules to handheld capnometer devices. With multiple measurements delivered through either mainstream or sidestream options, the Company’s customers can benefit from CO₂, N₂O, O₂ and anesthetic agent monitoring in many hospital environments, such as operating rooms, procedural sedation and intensive care units. The Company paid $30.5 million for all outstanding shares of Phasein. The final purchase price allocation resulted in $16.1 million assigned to goodwill, $12.6 million assigned to intangible assets, $1.4 million assigned to inventory, $2.4 million assigned to various other assets and $2.0 million assigned to various liabilities. The Company funded the acquisition entirely with existing cash and cash equivalents. The assets acquired from, and the liabilities assumed in connection with, the acquisition of Phasein, as well as its results of operations since the acquisition date, are included in these condensed consolidated financial statements. Pro forma results of operations for this acquisition were not presented because the effect of this acquisition was not material to the Company’s financial condition or results of operations.

Acquisitions

6 Months Ended

Jun. 29, 2013

4. Acquisitions

Spire Semiconductor (currently Masimo Semiconductor)

On March 9, 2012, the Company acquired substantially all of the assets and certain liabilities of Spire Semiconductor, LLC, or Spire, a maker of advanced light emitting diode and other advanced component-level technologies. In 2012, Spire Semiconductor was renamed Masimo Semiconductor, Inc., which is a wholly-owned subsidiary of Masimo Corporation. The acquisition gave the Company an advanced ability to develop custom components, accelerate development cycles, and optimize future product costs. Masimo Semiconductor, based in New Hampshire, specializes in wafer epitaxy, foundry services and device fabrication for biomedical, telecommunications, consumer products and other markets.

Under the acquisition agreement, the Company paid $7.2 million and assumed $1.2 million of Spire’s liabilities. Simultaneous with this asset acquisition, the Company entered into a lease agreement with a related party to Spire to lease manufacturing and office space in New Hampshire through March 2017.

All the assets and liabilities acquired from Spire as of March 9, 2012, and Masimo Semiconductor’s operating results since the acquisition date, have been included in these condensed consolidated financial statements. Pro forma results of operations for this acquisition were not presented because the effect of this acquisition was not material to the Company’s financial condition or results of operations.

Phasein (currently Masimo Sweden)

On July 27, 2012, the Company acquired PHASEIN AB, or Phasein, a developer and manufacturer of ultra-compact mainstream and sidestream capnography and gas monitoring technologies. In 2013, Phasein was renamed Masimo Sweden. The acquisition of Phasein’s technologies complements the Company’s breakthrough innovations for patient monitoring with a portfolio of products ranging from OEM solutions for external “plug-in-and-measure” capnography and gas analyzers and integrated modules to handheld capnometer devices.

With multiple measurements delivered through either mainstream or sidestream options, the Company’s customers can benefit from CO₂, N₂O, O₂ and anesthetic agent monitoring in many hospital environments, such as operating rooms, procedural sedation and intensive care units.

The Company paid $30.5 million for all outstanding shares of Phasein. The final purchase price allocation resulted in $16.1 million assigned to goodwill, $12.6 million assigned to intangible assets, $1.4 million assigned to inventory, $2.4 million assigned to various other assets and $2.0 million assigned to various liabilities. The Company funded the acquisition entirely with existing cash and cash equivalents. The assets acquired from, and the liabilities assumed in connection with, the acquisition of Phasein, as well as its results of operations since the acquisition date, are included in these condensed consolidated financial statements. Pro forma results of operations for this acquisition were not presented because the effect of this acquisition was not material to the Company’s financial condition or results of operations.