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Business and Product Line Acquisitions - Additional Information (Detail) - USD ($)
 6 Months Ended
Jul. 31, 2020
Mar. 26, 2020
Feb. 28, 2020
Jan. 31, 2020
Jan. 09, 2020
Jan. 01, 2020
Nov. 30, 2020
Business Acquisition [Line Items]              
Purchase price allocation for inventory   $ 164,000          
Purchase price allocation for other current liabilities           $ 11,000  
Abtek Biologicals Limited              
Business Acquisition [Line Items]              
Cash consideration for purchase of business       $ 1,401,000      
Purchase price allocation for accounts receivable       135,000      
Purchase price allocation for inventory       207,000      
Purchase price allocation for land, property and equipment       105,000      
Purchase price allocation for intangible assets       484,000      
Purchase price allocation for accounts payable       118,000      
Purchase price allocation for deferred tax liability       92,000      
Purchase price allocation for other current liabilities       34,000      
Cash payable to former owner for purchase of business       119,000      
Cash paid for purchase of business       $ 1,282,000      
Cash payable to former owner for purchase of business, due date       Jan. 31, 2021      
Purchase price allocation for Prepaid Expenses       $ 6,000      
Chile-based Magiar Chilena              
Business Acquisition [Line Items]              
Cash consideration for purchase of business   400,000          
Purchase price allocation for land, property and equipment   53,000          
Purchase price allocation for intangible assets   183,000          
Cash payable to former owner for purchase of business   50,000          
Cash paid for purchase of business   $ 350,000          
Cash payable to former owner for purchase of business, due date   Mar. 26, 2021          
Beef Cattle And Related Assets [Member]              
Business Acquisition [Line Items]              
Cash consideration for purchase of business $ 2,351,000            
Purchase price allocation for inventory 51,000            
Purchase price allocation for intangible assets $ 2,300,000            
Finite lived intangible assets, useful life 15 years            
ARGENTINA | Productos Quimicos Magiar              
Business Acquisition [Line Items]              
Cash consideration for purchase of business           3,776,000  
Contingent consideration potential payment           979,000  
Purchase price allocation for accounts receivable           603,000  
Purchase price allocation for inventory           446,000  
Purchase price allocation for land, property and equipment           36,000  
Allocation of purchase price for contingent consideration potential payment           640,000  
Purchase price allocation for intangible assets           1,471,000  
Purchase price allocation for accounts payable           383,000  
Purchase price allocation for deferred tax liability           441,000  
Purchase price allocation for other current liabilities           312,000  
Cash payable to former owner for purchase of business           540,000  
Cash paid for purchase of business           $ 3,237,000  
Cash payable to former owner for purchase of business, due date           Jan. 01, 2022  
Purchase price allocation for other current assets           $ 221,000  
URUGUAY | Productos Quimicos Magiar              
Business Acquisition [Line Items]              
Cash consideration for purchase of business           1,488,000  
Contingent consideration potential payment           241,000  
Purchase price allocation for accounts receivable           280,000  
Purchase price allocation for inventory           174,000  
Purchase price allocation for land, property and equipment           16,000  
Allocation of purchase price for contingent consideration potential payment           159,000  
Purchase price allocation for intangible assets           398,000  
Purchase price allocation for accounts payable           204,000  
Purchase price allocation for deferred tax liability           99,000  
Cash payable to former owner for purchase of business           210,000  
Cash paid for purchase of business           $ 1,278,000  
Cash payable to former owner for purchase of business, due date           Jan. 01, 2022  
Purchase price allocation for other current assets           $ 68,000  
ITALY | Diessechem Srl              
Business Acquisition [Line Items]              
Cash consideration for purchase of business         $ 3,455,000    
Purchase price allocation for accounts receivable         780,000    
Purchase price allocation for inventory         5,000    
Purchase price allocation for intangible assets         1,225,000    
Purchase price allocation for accounts payable         140,000    
Purchase price allocation for deferred tax liability         294,000    
Purchase price allocation for other current liabilities         305,000    
Purchase price allocation for other current assets         $ 160,000    
AUSTRALIA | Cell BioSciences              
Business Acquisition [Line Items]              
Cash consideration for purchase of business     $ 3,768,000        
Purchase price allocation for inventory     420,000        
Allocation of purchase price for contingent consideration potential payment     13,000        
Purchase price allocation for intangible assets     1,338,000        
Cash payable to former owner for purchase of business     172,000        
Cash paid for purchase of business     $ 3,596,000        
Minimum              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life             5 years
Minimum | Abtek Biologicals Limited              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life       5 years      
Minimum | Chile-based Magiar Chilena              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life   5 years          
Minimum | ARGENTINA | Productos Quimicos Magiar              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life           5 years  
Minimum | URUGUAY | Productos Quimicos Magiar              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life           5 years  
Minimum | ITALY | Diessechem Srl              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life         5 years    
Minimum | AUSTRALIA | Cell BioSciences              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life     3 years        
Maximum              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life             25 years
Maximum | Abtek Biologicals Limited              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life       10 years      
Maximum | Chile-based Magiar Chilena              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life   10 years          
Maximum | ARGENTINA | Productos Quimicos Magiar              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life           10 years  
Maximum | URUGUAY | Productos Quimicos Magiar              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life           10 years  
Maximum | ITALY | Diessechem Srl              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life         10 years    
Maximum | AUSTRALIA | Cell BioSciences              
Business Acquisition [Line Items]              
Finite lived intangible assets, useful life     10 years