v3.26.1
Related Party Transactions (Details) - USD ($)
12 Months Ended
Mar. 31, 2025
Sep. 20, 2024
Aug. 07, 2024
Jul. 29, 2024
Jul. 26, 2024
Jul. 24, 2024
Jul. 23, 2024
Apr. 25, 2024
Mar. 31, 2023
Jul. 01, 2022
Dec. 02, 2021
Mar. 27, 2026
Mar. 28, 2025
Mar. 29, 2024
Related Party Transaction [Line Items]                            
Net proceeds from issuance of common stock                       $ 0 $ 665,850,000 $ 0
Recognized loss of fair value forward repurchase contract                       0 34,752,000 0
Net sales                       890,096,000 725,006,000 1,049,367,000
Net Income (Loss)                       (14,897,000) (73,010,000) 152,697,000
Trade accounts receivable, net                       93,248,000 84,598,000  
Selling, general and administrative expenses                       181,089,000 161,680,000 188,429,000
Outstanding balance                       280,884,000 338,929,000  
Interest income                         89,000  
Periodic payment                         $ 1,964,000  
Share Repurchase Agreement                            
Related Party Transaction [Line Items]                            
Facilitation fee included in transaction expenses             $ 35,000,000              
Facilitation fee       $ 35,000,000                    
Common Stock                            
Related Party Transaction [Line Items]                            
Issuance of common stock                         28,750,000  
Common Stock | Share Repurchase Agreement                            
Related Party Transaction [Line Items]                            
Repurchase of common stock     10,017,315 28,750,000     38,767,315              
Repurchase of common stock aggregate consideration , value     $ 225,549,000 $ 628,256,000                    
Common Stock | Equity Offering                            
Related Party Transaction [Line Items]                            
Net proceeds from issuance of common stock         $ 665,850,000                  
Issuance of common stock         28,750,000 25,000,000                
Share price         $ 24 $ 23.16                
Underwriting discount         $ 24,150,000                  
Common Stock | Equity Offering | Minimum                            
Related Party Transaction [Line Items]                            
Net proceeds from issuance of common stock             $ 300,000,000              
Common Stock | Underwriters Option                            
Related Party Transaction [Line Items]                            
Issuance of common stock           3,750,000                
Polar Semiconductor, LLC                            
Related Party Transaction [Line Items]                            
Loss on extinguishment of debt   $ 2,804,000                        
Extinguishment of Debt, Amount   10,350,000                        
Advanced Payments Other Assets                       15,000,000    
Exchange for equity interests amounts of transaction               $ 175,000,000            
Sanken | Sanken Distribution Agreement, One-Time Sales Return                            
Related Party Transaction [Line Items]                            
Net sales                           6,161,000
Trade accounts receivable, net                       0 $ 0  
Selling, general and administrative expenses                 $ 5,000,000          
Related party transaction amounts                 $ 4,200,000          
Distribution agreement period 12 months               24 months          
PSL                            
Related Party Transaction [Line Items]                            
Net Income (Loss)                       (9,399,000) 1,176,000 (538,000)
Purchases from related party                       62,468,000 55,001,000 $ 60,426,000
Amounts due to related party                       $ 4,794,000 $ 6,535,000  
PSL | Initial PSL Loan | Loans Payable                            
Related Party Transaction [Line Items]                            
Principal amount                     $ 7,500,000      
Interest rate                     1.26%      
Term                     4 years      
PSL | Secondary PSL Loan | Loans Payable                            
Related Party Transaction [Line Items]                            
Principal amount                   $ 7,500,000        
Interest rate                   2.99%        
Term                   4 years        
PSL | PSL Promissory Notes                            
Related Party Transaction [Line Items]                            
Extinguishment of Debt, Amount   $ 6,596,000                        
Sanken Electric Co., Ltd.                            
Related Party Transaction [Line Items]                            
Ownership percentage by majority shareholder                       32.20%    
Allegro Microsystems, Inc. | Polar Semiconductor, LLC                            
Related Party Transaction [Line Items]                            
Ownership percentage by majority shareholder               10.20%