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Goodwill and Intangible Assets - Schedule of Amortization Expenses Recorded in the Statements of Income (Details) - USD ($) | 12 Months Ended
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Jan. 31, 2021 | Jan. 26, 2020 | Jan. 27, 2019
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |
Intangible amortization | $ 8,265,000 | $ 16,546,000 | $ 26,649,000
Core technologies |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |
Intangible amortization | 7,676,000 | 14,263,000 | 20,916,000
Customer relationships |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |
Intangible amortization | $ 589,000 | $ 2,283,000 | $ 5,733,000

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- Definition [Line Items] for Schedule of Goodwill and Intangible Assets [Table] + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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