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Commitments and Contingencies - Additional Information (Detail)
 12 Months Ended
Aug. 21, 2020
USD ($)
Installment
shares
Dec. 31, 2010
USD ($)
Program
Dec. 31, 2020
USD ($)
Installment
shares
Dec. 31, 2019
USD ($)
Jun. 15, 2005
USD ($)
Commitments And Contingencies [Line Items]          
Other noncurrent liability     $ 2,280,000 $ 2,000,000  
Milestones payments yet to be achieved     2,000,000 2,000,000  
Milestones payment     0 0  
Accounts Payable and Accrued Expenses [Member]          
Commitments And Contingencies [Line Items]          
Royalties due to both related and unrelated parties on license revenue accrued     $ 356,000 266,000  
Anawah, Inc [Member]          
Commitments And Contingencies [Line Items]          
Contingent liability   $ 3,000,000     $ 5,000,000
Date of merger and reorganization     Jun. 15, 2005    
Restructuring activities, description     As of December 31, 2010, the Company ceased activities relating to three of the six Anawah product programs    
Number of development programs ceased | Program   3      
Number of development programs | Program   6      
Other noncurrent liability     $ 2,000,000    
Gain on abandon of technologies       $ 1,000,000  
Industrial Seed Innovations [Member]          
Commitments And Contingencies [Line Items]          
Operating leases, term of contract     3 years    
Remaining amount paid in multiple installments $ 280,000   $ 280,000    
Number of installment become due within 12 months as full amount contingent consideration included in other noncurrent liabilities | Installment     0    
Industrial Seed Innovations [Member] | Common Stock [Member]          
Commitments And Contingencies [Line Items]          
Number of annual installment of common stock shares payable | Installment 2   2    
Minimum [Member]          
Commitments And Contingencies [Line Items]          
Operating leases, term of contract     1 year    
Royalty payments due, percentage of net revenue as defined in the In-Licensing agreements     2.00%    
Maximum [Member]          
Commitments And Contingencies [Line Items]          
Operating leases, term of contract     5 years    
Royalty payments due, percentage of net revenue as defined in the In-Licensing agreements     15.00%    
Maximum [Member] | Industrial Seed Innovations [Member] | Common Stock [Member] | Revenue Milestone in 2021 [Member]          
Commitments And Contingencies [Line Items]          
Business combination, equity interest issuable upon achievement of revenue milestone | shares 132,626   132,626    
Maximum [Member] | Industrial Seed Innovations [Member] | Common Stock [Member] | Revenue Milestone in 2022 [Member]          
Commitments And Contingencies [Line Items]          
Business combination, equity interest issuable upon achievement of revenue milestone | shares 132,626   132,626