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Revenue from Contracts with Customers | 9 Months Ended | 12 Months Ended
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Dec. 25, 2020 | Mar. 27, 2020
Revenue from Contract with Customer [Abstract] |  |
Revenue from Contracts with Customers | 4. Revenue from Contracts with Customers The Company generates revenue from the sale of magnetic sensor integrated circuits (“ICs”), application-specific analog power semiconductors, wafer foundry products and from the sale of Sanken-related products. The following tables summarize net sales disaggregated by core end market and application, by product and by geography for the three- and nine-month periods ended December 25, 2020 and December 27, 2019. The categorization of net sales by core end market and application is determined using various characteristics of the product and the application into which the Company’s product will be incorporated. The categorization of net sales by geography is determined based on the location the products are being shipped to. Net sales by core end market and application:
|  | Three-Month Period Ended |  |  | Nine-Month Period Ended |
|  | December 25, 2020 |  |  | December 27, 2019 |  |  | December 25, 2020 |  |  | December 27, 2019 |
Core end market: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Automotive |  | $ | 113,902 |  |  | $ | 99,074 |  |  | $ | 279,759 |  |  | $ | 289,681 |
Industrial |  |  | 23,654 |  |  |  | 21,358 |  |  |  | 65,710 |  |  |  | 56,095 |
Other |  |  | 26,893 |  |  |  | 15,070 |  |  |  | 70,630 |  |  |  | 53,399 |
Other applications: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wafer foundry products |  |  | — |  |  |  | 16,634 |  |  |  | — |  |  |  | 49,622 |
Distribution of Sanken products |  |  | — |  |  |  | 7,666 |  |  |  | — |  |  |  | 26,688 |
Total net sales |  | $ | 164,449 |  |  | $ | 159,802 |  |  | $ | 416,099 |  |  | $ | 475,485 |
Net sales by product:
|  | Three-Month Period Ended |  |  | Nine-Month Period Ended |
|  | December 25, 2020 |  |  | December 27, 2019 |  |  | December 25, 2020 |  |  | December 27, 2019 |
Power integrated circuits (“PIC”) |  | $ | 54,406 |  |  | $ | 43,665 |  |  | $ | 146,276 |  |  | $ | 123,900 |
Magnetic sensors (“MS”) |  |  | 109,457 |  |  |  | 91,837 |  |  |  | 268,956 |  |  |  | 275,275 |
Photonics |  |  | 586 |  |  |  | — |  |  |  | 867 |  |  |  | — |
Wafer foundry products |  |  | — |  |  |  | 16,634 |  |  |  | — |  |  |  | 49,622 |
Distribution of Sanken products |  |  | — |  |  |  | 7,666 |  |  |  | — |  |  |  | 26,688 |
Total net sales |  | $ | 164,449 |  |  | $ | 159,802 |  |  | $ | 416,099 |  |  | $ | 475,485 |
Net sales by geography:
|  | Three-Month Period Ended |  |  | Nine-Month Period Ended |
|  | December 25, 2020 |  |  | December 27, 2019 |  |  | December 25, 2020 |  |  | December 27, 2019 |
Americas: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
United States |  | $ | 23,934 |  |  | $ | 27,498 |  |  | $ | 57,892 |  |  | $ | 86,746 |
Other Americas |  |  | 5,620 |  |  |  | 4,722 |  |  |  | 10,797 |  |  |  | 15,930 |
EMEA: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Europe |  |  | 28,239 |  |  |  | 24,341 |  |  |  | 70,459 |  |  |  | 76,622 |
Asia: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Japan |  |  | 26,439 |  |  |  | 46,010 |  |  |  | 72,570 |  |  |  | 131,950 |
Greater China |  |  | 46,172 |  |  |  | 35,284 |  |  |  | 116,178 |  |  |  | 95,244 |
South Korea |  |  | 17,606 |  |  |  | 14,119 |  |  |  | 43,733 |  |  |  | 41,413 |
Other Asia |  |  | 16,439 |  |  |  | 7,828 |  |  |  | 44,470 |  |  |  | 27,580 |
Total net sales |  | $ | 164,449 |  |  | $ | 159,802 |  |  | $ | 416,099 |  |  | $ | 475,485 |
The Company recognizes sales net of returns, credits issued, price protection adjustments and stock rotation rights. At December 25, 2020 and March 27, 2020, these adjustments were $16,574 and $17,473, respectively, and were netted against trade accounts receivable in the unaudited consolidated balance sheets. These amounts represent activity of credits of $899 and $815 for the nine-month periods ended December 25, 2020 and December 27, 2019, respectively. Unsatisfied performance obligations primarily represent contracts for products with future delivery dates. The Company elected to not disclose the amount of unsatisfied performance obligations as these contracts have original expected durations of less than one year. | 3. Revenue from Contracts with Customers The Company generates revenue from the sale of magnetic sensor integrated circuits (“ICs”), application-specific analog power semiconductors, wafer foundry products and from the sale of Sanken related products. The following table summarizes net sales disaggregated by core end market and application, by product and by geography for the fiscal year ended March 27, 2020. The categorization of net sales by core end market and application is determined using various characteristics of the product and the application into which the Company’s product will be incorporated. The categorization of net sales by geography is determined based on the location the products are being shipped to. Net sales by core end market and application:
|  | Fiscal Year Ended March 27, 2020 |
Core end market: |  |  |  |
Automotive |  | $ | 395,277 |
Industrial |  |  | 78,399 |
Other |  |  | 68,622 |
Other applications: |  |  |  |
Wafer foundry products |  |  | 72,370 |
Distribution of Sanken products |  |  | 35,421 |
Total net sales |  | $ | 650,089 |
Net sales by product:
|  | Fiscal Year Ended March 27, 2020 |
Power integrated circuits (‘PIC”) |  | $ | 165,911 |
Magnetic sensors (“MS”) |  |  | 376,387 |
Wafer foundry products |  |  | 72,370 |
Distribution of Sanken products |  |  | 35,421 |
Total net sales |  | $ | 650,089 |
Net sales by geography:
|  | Fiscal Year Ended March 27, 2020 |
Americas: |  |  |  |
United States |  | $ | 119,139 |
Other Americas |  |  | 20,883 |
EMEA: |  |  |  |
Europe |  |  | 110,126 |
Asia: |  |  |  |
Japan |  |  | 184,557 |
Greater China |  |  | 121,807 |
South Korea |  |  | 54,707 |
Other Asia |  |  | 38,870 |
Total net sales |  | $ | 650,089 |
The Company recognizes sales net of returns, credits issued, price protection adjustments and stock rotation rights. For the fiscal years ended March 29, 2019 and March 27, 2020, these adjustments were $17,608 and $17,185, respectively and were netted against trade accounts receivables in the consolidated balance sheets. Unsatisfied performance obligations primarily represent contracts for products with future delivery dates. The Company elected to not disclose the amount of unsatisfied performance obligations as these contracts have original expected durations of less than one year.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 + Details
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