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Accounts payable and accrued liabilities (Tables)
 12 Months Ended
Dec. 31, 2019
Payables and Accruals [Abstract]  
Disclosure of Detailed Information on Accounts Payable and Other Liabilities
    December 31,
2019		   December 31,
2018		 
Trade accounts payable
    $6,551     $4,213 
Employee-related accruals
   2,643    3,249 
Other accrued liabilities
   2,101    1,941 
           
     $11,295     $9,403