Annual report pursuant to Section 13 and 15(d)

Condensed Financial Statements - Summary of Components of Revenue (Detail)

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Condensed Financial Statements - Summary of Components of Revenue (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disaggregation of Revenue [Line Items]                      
Revenue $ 3,764 $ 2,967 $ 408 $ 157 $ 2 $ 27 $ 196 $ 11 $ 7,296 $ 236 $ 508
Soybean Oil [Member]                      
Disaggregation of Revenue [Line Items]                      
Revenue                 1,685    
Soybean Meal [Member]                      
Disaggregation of Revenue [Line Items]                      
Revenue                 5,604    
Licensing of Technology [Member]                      
Disaggregation of Revenue [Line Items]                      
Revenue                 $ 7 $ 236 $ 508