v3.25.2
Business Combinations - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2023
Nov. 30, 2022
Sep. 30, 2022
Jul. 31, 2022
Aug. 31, 2025
May 31, 2025
May 31, 2024
May 31, 2023
Feb. 28, 2025
Oct. 31, 2023
Business Acquisition [Line Items]                    
Adjustments to intangible assets         $ 100          
Payments to Acquire Businesses, Net of Cash Acquired           $ 0 $ 0 $ (11,721)    
Maximum potential Payments $ 8,500                  
Other non-current liabilities 930               $ 930  
Stock Issued During Period, Value, Acquisitions               2,262,841    
Goodwill           1,064,902 2,135,632 2,137,496    
Operating Income (Loss)           (1,060,997) 58,663 37,515    
Amortization expense for intangible assets           $ 93,917 $ 94,946 71,085    
Thaineo Biotech Co Ltd                    
Business Acquisition [Line Items]                    
Cash consideration for purchase of business   $ 37   $ 1,310            
Purchase price allocation for intangible assets       $ 620            
Useful Life in Years       10 years            
Business combination, consideration transferred       $ 1,581            
Cash payable to former owner for purchase of business                   $ 234
Corvium Inc                    
Business Acquisition [Line Items]                    
Business combination, consideration transferred 24,067                  
Cash held in escrow 9,004                  
Escrow balance released $ 8,000                  
3M Food Safety Transaction                    
Business Acquisition [Line Items]                    
Business combination, consideration transferred     $ 3,200,000              
Number of shares issued in business acquisitions     108,269,946              
Stock Issued During Period, Value, Acquisitions     $ 2,200,000              
Revenues               919,959    
Operating Income (Loss)               $ 44,373    
3M Food Safety Transaction | Garden Spinco                    
Business Acquisition [Line Items]                    
Non-cash consideration by additional financing     $ 1,000,000              
3M Food Safety Transaction | Postmerger Neogen Corp | PreMerger Neogen Shareholders                    
Business Acquisition [Line Items]                    
Minority interest ownership percentage by Noncontrolling owners     49.90%              
3M Food Safety Transaction | Postmerger Neogen Corp | Garden Spinco                    
Business Acquisition [Line Items]                    
Minority interest ownership percentage by Parent     50.10%              
Minimum                    
Business Acquisition [Line Items]                    
Useful Life in Years           2 years        
Maximum                    
Business Acquisition [Line Items]                    
Useful Life in Years           25 years