Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.10.0.1
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Significant Accounting Policies [Line Items]          
Restricted cash $ 50,000   $ 50,000    
Trade accounts receivable 0   0   $ 0
Impairment of long-lived assets 0 $ 0 0 $ 0  
Fair value movements between Level 2 and Level 3     0 0  
Cost of revenue 0 0 0 0  
Grain Broker License [Member]          
Significant Accounting Policies [Line Items]          
Restricted cash 50,000   $ 50,000    
License term     1 year    
Forward Purchase Contracts [Member]          
Significant Accounting Policies [Line Items]          
Asset Derivatives 0   $ 0   3,000
Liability Derivatives 413,000   413,000   $ 4,000
Level 3 [Member]          
Significant Accounting Policies [Line Items]          
Financial instruments classified as Level 3 $ 0 $ 0 $ 0 $ 0