v3.10.0.1

Restructuring Charges - Narrative (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 29, 2018 USD ($) ft² | Mar. 31, 2018 USD ($) | Sep. 29, 2018 USD ($) ft² | Sep. 30, 2017 USD ($)
Capital Leased Assets [Line Items] |  |  |  |
Lease obligation |  |  |  | $ 3,100
Deferred rent liability |  |  |  | $ 2,600
Impairment of leasehold | $ 500 |  |  |
Restructuring charges | $ 100 | $ 500 | $ 187 |
Massachusetts |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |
Area of real estate property | ft² | 108,743 |  | 108,743 |
Massachusetts | Property Subject to Operating Lease |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |
Area of real estate property | ft² | 25,812 |  | 25,812 |
Restructuring charges | $ 100 | $ 500 |  |

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- Definition The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 + Details
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