XML 37 R22.htm IDEA: XBRL DOCUMENT v3.20.1
Accounts Receivable and Allowance for Credit Losses (Tables)
3 Months Ended
Mar. 31, 2020
Accounts Receivable and Allowance for Credit Losses  
Schedule of rollforward of allowance for credit losses

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Balance at 

​

​

​

​

​

​

​

​

​

​

Balance at 

​

​

Beginning of

​

Expense

​

​

​

​

​

​

​

End of

​

    

 Period

    

 (recovery)

    

Write off

    

Other

    

Period

Three Months Ended March 31, 2020

​

$

837

​

$

625

​

$

(32)

​

$

—

​

$

1,430

Three Months Ended March 31, 2019

​

 

576

​

 

—

​

 

—

​

 

2

​

 

578