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Trade receivables
9 Months Ended
Sep. 30, 2021
Trade receivables  
Trade receivables

13.    Trade receivables

Trade receivables are generally secured by the equipment that they relate to as it is Company policy that equipment is not released until payment has been collected. The following table presents the activity in the allowance for expected credit losses for the period ended September 30, 2021:

Balance, December 31, 2020

    

$

(5,467)

Current period provision

 

(392)

Write-offs charged against the allowance

 

1,721

Balance, September 30, 2021

$

(4,138)