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Segment and Geographic Information - Summary of net sales by the countries and property, plant and equipment, net of accumulated depreciation (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues [Abstract]      
Revenues $ 170,086 $ 144,568 $ 150,000
Interest expense [Abstract]      
Interest expense 2,056 2,614 2,794
Interest income [Abstract]      
Interest income (note 16) 625 1,036 311
Interest income 625 1,036 311
Depreciation and amortization [Abstract]      
Depreciation and amortization 6,825 7,366 7,027
Gross margin [Abstract]      
Gross margin 10,960 (7,345) 9,317
ASSETS      
Assets 354,031 183,408  
Property, plant and equipment, net [Abstract]      
Property, plant and equipment, net 187,020 63,158  
Produce Business [Member]      
Revenues [Abstract]      
Revenues 156,891 143,419 148,054
Interest expense [Abstract]      
Interest expense 1,759 2,543 2,705
Depreciation and amortization [Abstract]      
Depreciation and amortization 5,356 6,462 6,155
Gross margin [Abstract]      
Gross margin 9,621 (6,667) 9,153
Canada [Member]      
ASSETS      
Assets 243,924 2,946  
Property, plant and equipment, net [Abstract]      
Property, plant and equipment, net 131,009 2,743  
Canada [Member] | Cannabis Business [Member]      
Revenues [Abstract]      
Revenues 12,778    
Interest expense [Abstract]      
Interest expense 243    
Interest income [Abstract]      
Interest income (note 16) 2    
Interest income 2    
Depreciation and amortization [Abstract]      
Depreciation and amortization 822    
Gross margin [Abstract]      
Gross margin 2,193    
Canada [Member] | Energy Business [Member]      
Revenues [Abstract]      
Revenues 417 1,149 1,946
Interest expense [Abstract]      
Interest expense 54 71 89
Depreciation and amortization [Abstract]      
Depreciation and amortization 647 904 872
Gross margin [Abstract]      
Gross margin (854) (678) 164
Corporate [Member]      
Interest income [Abstract]      
Interest income (note 16) 623 1,036 311
Interest income 623 1,036 $ 311
United States [Member]      
ASSETS      
Assets 110,107 180,462  
Property, plant and equipment, net [Abstract]      
Property, plant and equipment, net $ 56,011 $ 60,415