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Valuation and qualifying accounts (Tables)
 12 Months Ended
Dec. 31, 2020
Valuation And Qualifying Accounts [Abstract]  
Schedule Of Valuation And Qualifying Accounts

Description

 

Balance at beginning of period

 

 

Additions

 

 

Deductions

 

 

Balance at end of period

 

Year ended December 31, 2020

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Allowance for doubtful accounts

 

$

526

 

 

$

1,582

 

 

$

810

 

 

$

1,298

 

Year ended December 31, 2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Allowance for doubtful accounts

 

$

801

 

 

$

308

 

 

$

583

 

 

$

526