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Segment, Geographic, Product and Significant Customer Information - Textual (Details) - segment | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 29, 2018 | Sep. 30, 2017 | Sep. 29, 2018 | Sep. 30, 2017 | Dec. 30, 2017
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Number of operating segments |  |  | 1 |  |
Samsung Electronics Co. Ltd. [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage | 10.00% | 10.00% | 10.00% | 10.00% |
Samsung Electronics Co. Ltd. [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage |  |  |  |  | 10.00%
Yangtze Memory Technologies Co. Ltd. [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage | 10.00% |  | 10.00% |  |
SK Hynix [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage | 10.00% |  | 10.00% | 10.00% |
SK Hynix [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage |  |  | 10.00% |  |
Toshiba Corporation [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage | 10.00% |  | 10.00% |  |
Toshiba Corporation [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage |  |  | 10.00% |  |
Micron Technology, Inc. [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage |  | 10.00% | 10.00% | 10.00% |
Micron Technology, Inc. [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage |  |  |  |  | 10.00%
Intel Corporation [Member] | Sales [Member] | Customer Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage |  | 10.00% |  | 10.00% |
Intel Corporation [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member] | Minimum [Member] |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |
Customer concentration risk percentage |  |  |  |  | 10.00%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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