Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

Contingent consideration - Narrative (Details)

v3.19.3.a.u2
Contingent consideration - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Sep. 20, 2013
Disclosure of contingent liabilities [line items]        
Payment for contingent consideration liability $ 100,000   $ 2,150,000  
Probability of the success of milestone achievement 86.00% 74.00%    
Fair value of contingent consideration $ 5,113,000   4,028,000  
Increase through adjustments arising from increase in fair value 1,085,000      
Revaluation of contingent consideration $ 1,185,000 $ 236,000    
Bottom of range        
Disclosure of contingent liabilities [line items]        
Probability of the success of milestone achievement 50.00% 50.00%    
Top of range        
Disclosure of contingent liabilities [line items]        
Probability of the success of milestone achievement 86.00% 74.00%    
Level 3 of fair value hierarchy        
Disclosure of contingent liabilities [line items]        
Effect of 10% increase in probability of success $ 637,000      
Effect of 10% decrease in probability of success 637,000      
Effect of 12% increase in discount rate 167,000      
Effect of 8% decrease in discount rate 177,000      
Joint ventures where entity is venturer        
Disclosure of contingent liabilities [line items]        
Amount of contingent consideration 7,750,000   $ 10,000,000 $ 10,000,000
Payment for contingent consideration liability $ 100,000 $ 0    
Income approach        
Disclosure of contingent liabilities [line items]        
Discount rate used in estimate in the value of contingent consideration 10.00% 10.00%