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Schedule II - Valuation and Qualifying Accounts (Notes) | 12 Months Ended
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Dec. 29, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Valuation and Qualifying Accounts |
MASIMO CORPORATION VALUATION AND QUALIFYING ACCOUNTS Years ended December 29, 2018, December 30, 2017 and December 31, 2016 (in thousands)
Description | Balance at beginning of period |  | Additions charged to expense and other accounts |  | Amounts charged against reserve |  | Balance at end of period
Year ended December 29, 2018 |  |  |  |  |  |  |
| Allowance for doubtful accounts | $ | 2,116 |  |  | $ | (486 | ) |  | $ | (95 | ) |  | $ | 1,535 |
| Sales returns, allowance and reserves | 371 |  |  | 1,416 |  |  | (1,408 | ) |  | 379 |
| Valuation allowance on deferred tax asset | — |  |  | — |  |  | — |  |  | — |
Year ended December 30, 2017 |  |  |  |  |  |  |
| Allowance for doubtful accounts | 1,698 |  |  | 251 |  |  | 167 |  |  | 2,116 |
| Sales returns, allowance and reserves | 605 |  |  | 1,593 |  |  | (1,827 | ) |  | 371 |
| Valuation allowance on deferred tax asset | — |  |  | — |  |  | — |  |  | — |
Year ended December 31, 2016 |  |  |  |  |  |  |
| Allowance for doubtful accounts | 1,967 |  |  | 259 |  |  | (528 | ) |  | 1,698 |
| Sales returns, allowance and reserves | 710 |  |  | 2,320 |  |  | (2,425 | ) |  | 605 |
| Valuation allowance on deferred tax asset | 4,196 |  |  | — |  |  | (4,196 | ) |  | — |

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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