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Concentration of Risk - Schedule of Significant Customers Accounting for at Least 10% of Net Sales During Period (Details) | 12 Months Ended
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Jan. 31, 2021 | Jan. 26, 2020 | Jan. 27, 2019
Net sales revenue |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 100.00% | 100.00% | 100.00%
Customer Concentration Risk | Net sales revenue | Trend-tek Technology Ltd (and affiliates) |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 17.00% | 13.00% | 14.00%
Customer Concentration Risk | Net sales revenue | Frontek Technology Corporation (and affiliates) |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 16.00% | 11.00% | 11.00%
Customer Concentration Risk | Net sales revenue | CEAC International Limited |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 11.00% | 8.00% | 8.00%
Customer Concentration Risk | Net sales revenue | Arrow Electronics (and affiliates) |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 9.00% | 9.00% | 10.00%
Customer Concentration Risk | Net sales revenue | Samsung Electronics (and affiliates) |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 2.00% | 4.00% | 8.00%
Customer Concentration Risk | Net sales revenue | Premier Technical Sales Korea, Inc. (and affiliates) |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 6.00% | 7.00% | 4.00%
Customer Concentration Risk | Accounts Receivable | Trend-tek Technology Ltd (and affiliates) |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 14.00% | 13.00% |
Customer Concentration Risk | Accounts Receivable | Frontek Technology Corporation (and affiliates) |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 10.00% | 11.00% |
Customer Concentration Risk | Accounts Receivable | CEAC International Limited |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 14.00% | 11.00% |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 2: 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 3: 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=121572278&loc=d3e13531-108611 Reference 4: 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=121572278&loc=d3e13537-108611 Reference 5: 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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