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Filing revisions can affect comparability.","accountingBasis":"GAAP","scope":"Consolidated"},{"metric":"net_income","label":"Net income","value":-642.357,"unit":"USD million","basis":"US GAAP · consolidated · ProfitLoss","evidenceClass":"derived","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000114036126015949/0001140361-26-015949-index.html","sources":[{"url":"https://www.sec.gov/Archives/edgar/data/88941/000114036126015949/0001140361-26-015949-index.html","accession":"0001140361-26-015949","filed":"2026-04-21","concept":"us-gaap:ProfitLoss","start":"2023-01-30","end":"2024-01-28","value":-1092029000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000131/smtc-20241027.htm","accession":"0000088941-24-000131","filed":"2024-12-03","concept":"us-gaap:ProfitLoss","start":"2023-01-30","end":"2023-10-29","value":-449672000,"unit":"USD"}],"note":"Quarter calculated as cumulative amount minus the preceding cumulative amount with matching start, concept and currency. Filing revisions can affect comparability.","accountingBasis":"GAAP","scope":"Consolidated"},{"metric":"operating_cash_flow","label":"Operating cash flow","value":13.919,"unit":"USD million","basis":"US GAAP · consolidated · NetCashProvidedByUsedInOperatingActivities","evidenceClass":"derived","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","sources":[{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","accession":"0000088941-26-000005","filed":"2026-03-23","concept":"us-gaap:NetCashProvidedByUsedInOperatingActivities","start":"2023-01-30","end":"2024-01-28","value":-93920000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000131/smtc-20241027.htm","accession":"0000088941-24-000131","filed":"2024-12-03","concept":"us-gaap:NetCashProvidedByUsedInOperatingActivities","start":"2023-01-30","end":"2023-10-29","value":-107839000,"unit":"USD"}],"note":"Quarter calculated as cumulative amount minus the preceding cumulative amount with matching start, concept and currency. Filing revisions can affect comparability.","accountingBasis":"GAAP","scope":"Consolidated"},{"metric":"capex","label":"Capital expenditures","value":1.712,"unit":"USD million","basis":"US GAAP · consolidated · PaymentsToAcquirePropertyPlantAndEquipment","evidenceClass":"derived","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","sources":[{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","accession":"0000088941-26-000005","filed":"2026-03-23","concept":"us-gaap:PaymentsToAcquirePropertyPlantAndEquipment","start":"2023-01-30","end":"2024-01-28","value":29185000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000131/smtc-20241027.htm","accession":"0000088941-24-000131","filed":"2024-12-03","concept":"us-gaap:PaymentsToAcquirePropertyPlantAndEquipment","start":"2023-01-30","end":"2023-10-29","value":27473000,"unit":"USD"}],"note":"Quarter calculated as cumulative amount minus the preceding cumulative amount with matching start, concept and currency. Filing revisions can affect comparability.","accountingBasis":"GAAP","scope":"Consolidated"},{"metric":"gross_margin","label":"Gross margin","value":-0.20212699794763356,"unit":"percent","basis":"US GAAP · consolidated · GrossProfit","evidenceClass":"derived","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","sources":[{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","accession":"0000088941-26-000005","filed":"2026-03-23","concept":"us-gaap:GrossProfit","start":"2023-01-30","end":"2024-01-28","value":296250000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000131/smtc-20241027.htm","accession":"0000088941-24-000131","filed":"2024-12-03","concept":"us-gaap:GrossProfit","start":"2023-01-30","end":"2023-10-29","value":296640000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","accession":"0000088941-26-000005","filed":"2026-03-23","concept":"us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax","start":"2023-01-30","end":"2024-01-28","value":868758000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000131/smtc-20241027.htm","accession":"0000088941-24-000131","filed":"2024-12-03","concept":"us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax","start":"2023-01-30","end":"2023-10-29","value":675810000,"unit":"USD"}],"note":"Gross profit / revenue × 100; GAAP/IFRS basis follows the inputs.","accountingBasis":"GAAP","scope":"Consolidated"},{"metric":"operating_margin","label":"Operating margin","value":-321.30936832721767,"unit":"percent","basis":"US GAAP · consolidated · OperatingIncomeLoss","evidenceClass":"derived","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","sources":[{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","accession":"0000088941-26-000005","filed":"2026-03-23","concept":"us-gaap:OperatingIncomeLoss","start":"2023-01-30","end":"2024-01-28","value":-944322000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000131/smtc-20241027.htm","accession":"0000088941-24-000131","filed":"2024-12-03","concept":"us-gaap:OperatingIncomeLoss","start":"2023-01-30","end":"2023-10-29","value":-324362000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","accession":"0000088941-26-000005","filed":"2026-03-23","concept":"us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax","start":"2023-01-30","end":"2024-01-28","value":868758000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000131/smtc-20241027.htm","accession":"0000088941-24-000131","filed":"2024-12-03","concept":"us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax","start":"2023-01-30","end":"2023-10-29","value":675810000,"unit":"USD"}],"note":"Operating income / revenue × 100; GAAP/IFRS basis follows the inputs.","accountingBasis":"GAAP","scope":"Consolidated"},{"metric":"net_margin","label":"Net margin","value":-332.91715902730266,"unit":"percent","basis":"US GAAP · consolidated · ProfitLoss","evidenceClass":"derived","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000114036126015949/0001140361-26-015949-index.html","sources":[{"url":"https://www.sec.gov/Archives/edgar/data/88941/000114036126015949/0001140361-26-015949-index.html","accession":"0001140361-26-015949","filed":"2026-04-21","concept":"us-gaap:ProfitLoss","start":"2023-01-30","end":"2024-01-28","value":-1092029000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000131/smtc-20241027.htm","accession":"0000088941-24-000131","filed":"2024-12-03","concept":"us-gaap:ProfitLoss","start":"2023-01-30","end":"2023-10-29","value":-449672000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","accession":"0000088941-26-000005","filed":"2026-03-23","concept":"us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax","start":"2023-01-30","end":"2024-01-28","value":868758000,"unit":"USD"},{"url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000131/smtc-20241027.htm","accession":"0000088941-24-000131","filed":"2024-12-03","concept":"us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax","start":"2023-01-30","end":"2023-10-29","value":675810000,"unit":"USD"}],"note":"Net income / revenue × 100; GAAP/IFRS basis follows the inputs.","accountingBasis":"GAAP","scope":"Consolidated"}],"breakdowns":[]}],"documents":[{"type":"SEC filing","title":"10-Q · 2026-07-26","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000034/smtc-20260726.htm","publishedAt":"2026-08-26","periodEnd":"2026-07-26"},{"type":"Earnings release","title":"Q2 FY2027 results","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000028/smtc-07262026x8k991.htm","publishedAt":"2026-08-25"},{"type":"SEC filing","title":"10-Q · 2026-04-26","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000013/smtc-20260426.htm","publishedAt":"2026-05-27","periodEnd":"2026-04-26"},{"type":"Revenue disclosure","title":"Semtech FY2026 Form 10-K","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","publishedAt":"2026-03-23"},{"type":"SEC filing","title":"10-Q · 2025-10-26","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894125000166/smtc-20251026.htm","publishedAt":"2025-11-25","periodEnd":"2025-10-26"},{"type":"SEC filing","title":"10-Q · 2025-07-27","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894125000160/smtc-20250727.htm","publishedAt":"2025-08-26","periodEnd":"2025-07-27"},{"type":"SEC filing","title":"10-Q · 2025-04-27","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894125000101/smtc-20250427.htm","publishedAt":"2025-05-29","periodEnd":"2025-04-27"},{"type":"SEC filing","title":"10-K · 2025-01-26","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894125000068/smtc-20250126.htm","publishedAt":"2025-03-25","periodEnd":"2025-01-26"},{"type":"SEC filing","title":"10-Q · 2024-10-27","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000131/smtc-20241027.htm","publishedAt":"2024-12-03","periodEnd":"2024-10-27"},{"type":"SEC filing","title":"10-Q · 2024-07-28","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000118/smtc-20240728.htm","publishedAt":"2024-08-28","periodEnd":"2024-07-28"},{"type":"SEC filing","title":"10-Q · 2024-04-28","url":"https://www.sec.gov/Archives/edgar/data/88941/000008894124000065/smtc-20240428.htm","publishedAt":"2024-06-05","periodEnd":"2024-04-28"}],"notes":["Results preliminary pending Form 10-Q."],"exposure":{"asOf":"2026-09-09","observations":[{"dimension":"geography","periodLabel":"FY2026","periodType":"annual","periodStart":null,"periodEnd":"2026-01-25","fiscalYear":2026,"fiscalQuarter":null,"currency":"USD","totalRevenue":1049.975,"unit":"USD million","basis":"customer location","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","sourceTitle":"Semtech FY2026 Form 10-K","publishedAt":"2026-03-23","coverage":"partial","note":"Annual report gives international and China shares only; 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The issuer share may be rounded; this is an approximate conversion, not reported customer invoice revenue or a forecast.","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm"},{"label":"China (including Hong Kong)","value":493.48825,"sharePct":47,"shareQualifier":null,"identity":"region","valueEvidence":"estimated","shareEvidence":"reported","note":"subset of outside-US; do not add","method":"ASTRIA disclosed-share estimate v1: 1049.975 USD million × 47% / 100. The issuer share may be rounded; this is an approximate conversion, not reported customer invoice revenue or a forecast.","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm"}],"id":"semtech-geography-annual-2026-01-25-0"},{"dimension":"customer","periodLabel":"FY2026","periodType":"annual","periodStart":null,"periodEnd":"2026-01-25","fiscalYear":2026,"fiscalQuarter":null,"currency":"USD","totalRevenue":1049.975,"unit":"USD million","basis":"net sales; customer identities anonymous","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","sourceTitle":"Semtech FY2026 Form 10-K","publishedAt":"2026-03-23","coverage":"partial","note":"Two anonymous customers; authorized-distributor aggregate overlaps customer rows.","rows":[{"label":"Customer A","value":115.49724999999998,"sharePct":11,"shareQualifier":null,"identity":"anonymous","valueEvidence":"estimated","shareEvidence":"reported","note":"","method":"ASTRIA disclosed-share estimate v1: 1049.975 USD million × 11% / 100. The issuer share may be rounded; this is an approximate conversion, not reported customer invoice revenue or a forecast.","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm"},{"label":"Customer B","value":146.99649999999997,"sharePct":14,"shareQualifier":null,"identity":"anonymous","valueEvidence":"estimated","shareEvidence":"reported","note":"","method":"ASTRIA disclosed-share estimate v1: 1049.975 USD million × 14% / 100. The issuer share may be rounded; this is an approximate conversion, not reported customer invoice revenue or a forecast.","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm"},{"label":"Authorized distributors","value":776.9815,"sharePct":74,"shareQualifier":null,"identity":"group","valueEvidence":"estimated","shareEvidence":"reported","note":"aggregate; overlaps customer rows","method":"ASTRIA disclosed-share estimate v1: 1049.975 USD million × 74% / 100. The issuer share may be rounded; this is an approximate conversion, not reported customer invoice revenue or a forecast.","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm"}],"id":"semtech-customer-annual-2026-01-25-1"}],"customerDisclosure":{"status":"reported","note":"Anonymous customer A and B represented 11% and 14% of FY2026 net sales.","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm","thresholdPct":10},"geographyDisclosure":{"status":"reported","note":"Partial international/China shares.","sourceUrl":"https://www.sec.gov/Archives/edgar/data/88941/000008894126000005/smtc-20260125.htm"},"relationships":[],"regionalContext":[]}}}