v3.7.0.1

Description of Business and Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	6 Months Ended
	Jul. 01, 2017	Oct. 01, 2017 USD ($) ft²	Apr. 14, 2016 ft²
Minimum
Entity Information [Line Items]
Fiscal period duration	364 days
Maximum
Entity Information [Line Items]
Fiscal period duration	371 days
Massachusetts
Entity Information [Line Items]
Area of real estate property			108,743
Massachusetts | Property Subject to Operating Lease
Entity Information [Line Items]
Area of real estate property			10,362
Forecast | Minimum
Entity Information [Line Items]
Lease obligation | $		$ 4.0
Forecast | Maximum
Entity Information [Line Items]
Lease obligation | $		$ 6.0
Forecast | Massachusetts | Property Subject to Operating Lease
Entity Information [Line Items]
Area of real estate property		25,812

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Area of a real estate property.

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84164758&loc=d3e45023-112735

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