Related Party Transactions	3 Months Ended
Related Party Transactions	Jun. 25, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Transactions involving Sanken The Company sells products to, and purchases in-process products from, Sanken. In addition, prior to March 28, 2020, the Company also sold products for Sanken. Net sales of Company’s products to Sanken totaled $35,453 and $23,620 during the three months ended June 25, 2021 and June 26, 2020, respectively. Trade accounts receivables, net of allowances from Sanken, totaled $23,545 and $21,595 as of June 25, 2021 and March 26, 2021, respectively. Other accounts receivable from Sanken totaled $110 and $198 as of June 25, 2021 and March 26, 2021, respectively. Transactions involving PSL In May 2009, the Company entered into a technology development agreement (the “IC Technology Development Agreement”) with Polar Semiconductor, Inc. (“PSI”), which was subsequently changed to Polar Semiconductor, LLC (“PSL”), and Sanken, pursuant to which the parties agreed upon the general terms under which they may, from time to time, undertake certain activities (the “IC Process Development Activities”) to develop new technologies to be used by PSI to manufacture products for the Company and Sanken, as well as the ownership and use of such technologies following their development. The IC Technology Development Agreement provides that the expenses for all IC Process Development Activities will be shared equally by the Company and Sanken on an annual basis (subject to any exceptions upon which the parties may agree from time to time), with such expenses being paid to PSI by Sanken in the form of an up-front annual fee, with PSI being responsible for any expenses that exceed the amount of such fee. The IC Technology Development Agreement will continue in effect until such time as the Company, PSL and Sanken mutually agree to its termination or adopt a successor agreement, or in the event the companies fail to agree upon the annual fee for a fiscal year within three months after the commencement of such fiscal year. During both of the three months ended June 25, 2021 and June 26, 2020, the Company (through PSL) received no fees from Sanken pursuant to the IC Technology Development Agreement, and, during the same periods, the Company paid no fees to PSL pursuant to the IC Technology Development Agreement. There are also no expected payments to be made during the remainder of fiscal year 2022 and beyond. In April 2015, PSL and Sanken entered into a discrete technology development agreement (as amended, the “Discrete Technology Development Agreement”), pursuant to which the parties agreed upon the general terms under which they, from time to time, undertook certain activities (the “Discrete Development Activities”) to develop new technologies to be used by PSL to manufacture products for Sanken, as well as the ownership and use of such technologies following their development. In June 2018, the Company, PSL and Sanken entered into an amendment to the Discrete Technology Development Agreement pursuant to which the parties agreed to the assignment of all rights and obligations of PSL under such agreement to the Company and to certain amendments to the terms of such agreement. The Discrete Technology Development Agreement provided that the expenses for all Discrete Development Activities to be shared equally by the Company and Sanken on an annual basis (subject to any exceptions upon which the parties agreed to from time to time). As of March 26, 2021, the Company had accrued $614 included in amounts due to related party under this agreement, which was paid in the first quarter of fiscal year 2022. The agreement in accordance with its terms of the Amendment 2, Article 10, terminated on March 31, 2021. On March 28, 2020, the Company entered into an agreement to divest a majority of its ownership interest in PSL to Sanken, in order to better align with its fabless, asset-lite scalable manufacturing strategy (the “PSL Divestiture”). In addition, this also resulted in PSL taking over the Sanken distribution business at the same time. The Company continues to purchase in-process products from PSL. Purchases of various products from PSL totaled $13,380 and $11,923 for the three months ended June 25, 2021 and June 26, 2020, respectively. These amounts include $— and $1,800 of price support payments made for the three months ended June 25, 2021 and June 26, 2020, respectively. The price support payments were for fiscal year 2021 only and no such payments are expected to be made in fiscal 2021 and beyond. Accounts payable to PSL included in amounts due to related party totaled $4,119 and $1,739 as of June 25, 2021 and March 26, 2021, respectively. Transactions involving Sanken Electric Europe Ltd. (“SEEL”) During fiscal year ended March 26, 2021 and after the PSL Divestiture, Sanken, through PSL formed SEEL to cover its distribution business in Europe. The Company in connection with the TSA agreement with Sanken and PSL paid certain costs on behalf of them, and as such, had related party accounts receivable from SEEL of $16 and $1,272 as of June 25, 2021 and March 26, 2021, respectively. Sublease Agreement In 2014, the Company, through one of its subsidiaries, entered into a sublease agreement with Sanken pursuant to which it subleases certain office building space in Japan from Sanken. The sublease automatically renews on an annual basis unless either party provides notice to the other party otherwise and can be terminated by either party upon providing six months’ notice. The Company made aggregate payments of approximately $56 and $57 to Sanken under the sublease agreement during each of the three months ended June 25, 2021 and June 26, 2020, respectively. Consulting Agreement The Company entered into a board executive advisor agreement (the “Consulting Agreement”) with Reza Kazerounian in June 2018, before Mr. Kazerounian became a member of the Company’s board of directors, pursuant to which the Company engaged Mr. Kazerounian to serve as executive advisor to the board of directors and the office of Chief Executive Officer. The Consulting Agreement provides for a fee payable to Mr. Kazerounian on a monthly basis in exchange for his services (which fee was reduced from $30 per month to $19 per month in connection with Mr. Kazerounian’s appointment to the board of directors in June 2018), as well as a grant of 12,000 shares of the Company’s Class L common stock and a signing bonus of $54 in connection with the execution of the Consulting Agreement. The Consulting Agreement provides that if Mr. Kazerounian is terminated by the board of directors, he will be entitled to a severance payment in the amount of $180 as well as a six-month vesting acceleration of his shares of Class L common stock. The board of directors and Mr. Kazerounian each have the right to terminate the Consulting Agreement at any time. During the three months ended June 25, 2021 and June 26, 2020, the Company paid aggregate fees of $56 and $90, respectively, to Mr. Kazerounian pursuant to the Consulting Agreement.