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Debt - Additional Information (Detail) - USD ($)
 3 Months Ended
Jan. 07, 2021
Jun. 30, 2017
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Debt Instrument [Line Items]          
Short term debt     $ 0 $ 0  
Agrinos Group Companies | Paycheck Protection Program Loan          
Debt Instrument [Line Items]          
Business combination, loan acquired     705,000    
Debt instrument, decrease, forgiveness by Small business administration, principal $ 667,000        
Debt instrument, decrease, forgiveness by Small business administration, interest 5,000        
Debt instrument, decrease, forgiveness by Small business administration $ 672,000        
Senior Secured Revolving Line of Credit          
Debt Instrument [Line Items]          
Aggregate principal amount     $ 275,000,000    
Senior secured credit facility, maturity date     Aug. 05, 2026    
Credit agreement, covenant description     the Credit Agreement contains two: namely, borrowers are required to maintain a Total Leverage (“TL”) Ratio of no more than 3.5-to-1, during the first three years, stepping down to 3.25-to-1 as of September 30, 2024, and a Fixed Charge Coverage Ratio of at least 1.25-to-1. In addition, to the extent that it completes acquisitions totaling $15 million or more in any 90-day period, AMVAC may step-up the TL Ratio by 0.5-to-1, not to exceed 4.00-to-1, for the next three full consecutive quarters.    
Consolidated funded debt ratio     3.25%    
Credit agreement, variable rate description     Under the Credit Agreement, revolving loans bear interest at a variable rate based, at borrower’s election with proper notice, on either (i) LIBOR plus the “Applicable Margin” which is based upon the Total Leverage (“TL”) Ratio (“LIBOR Revolver Loan”) or (ii) the greater of (x) the Prime Rate, (y) the Federal Funds Rate plus 0.5%, and (z) the Daily One-Month LIBOR Rate plus 1.00%, plus, in the case of (x), (y) or (z) the Applicable Margin (“Adjusted Base Rate Revolver Loan”). To the extent that LIBOR is discontinued during its term, the Credit Agreement includes a rate that approximates LIBOR. Interest payments for LIBOR Revolver Loans are payable on the last day of each interest period (either one-, three- or six- months, as selected by the borrower)    
Credit agreement, interest rate     1.83%    
Senior Secured Revolving Line of Credit | Federal Funds Rate          
Debt Instrument [Line Items]          
Credit agreement, variable rate basis   0.50%      
Senior Secured Revolving Line of Credit | One-Month LIBOR Rate          
Debt Instrument [Line Items]          
Credit agreement, variable rate basis   1.00%      
Senior Secured Revolving Line of Credit | Adjusted Base Rate          
Debt Instrument [Line Items]          
Credit agreement, interest payment period, description     last business day of each    
Term Loan | Senior Secured Revolving Line of Credit          
Debt Instrument [Line Items]          
Accordion feature     $ 150,000,000    
Credit Agreement | Senior Secured Revolving Line of Credit          
Debt Instrument [Line Items]          
Available borrowings capacity under credit agreement       $ 178,705,000 $ 50,993,000
Consolidated funded debt ratio     0.50%    
Maximum | Senior Secured Revolving Line of Credit          
Debt Instrument [Line Items]          
Available borrowings capacity under credit agreement     $ 25,000,000    
Consolidated funded debt ratio     3.50%    
Maximum | Credit Agreement | Senior Secured Revolving Line of Credit          
Debt Instrument [Line Items]          
Consolidated funded debt ratio     4.00%    
Joint venture, consideration     $ 50,000    
Capacity to increase borrowings under credit agreement     $ 166,165,000    
Minimum | Senior Secured Revolving Line of Credit          
Debt Instrument [Line Items]          
Consolidated fixed charge covenant ratio     1.25%    
Minimum | Credit Agreement | Senior Secured Revolving Line of Credit          
Debt Instrument [Line Items]          
Joint venture, consideration     $ 15,000,000