XML 93 R55.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Inventories - Additional Information (Detail) - USD ($) $ in Millions | Jan. 02, 2016 | Jan. 03, 2015
--- | --- | ---
Inventory Disclosure [Abstract] |  |
Finished goods inventory held by distributors | $ 2.9 | $ 3.6

X
- Definition Inventory finished goods held by distributors. + References No definition available. + Details
Name: | masi_InventoryFinishedGoodsHeldByDistributors
Namespace Prefix: | masi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration