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Schedule I - Valuation and Qualifying Accounts and Allowances
 12 Months Ended
Dec. 31, 2020
Valuation And Qualifying Accounts [Abstract]  
Schedule I - Valuation and Qualifying Accounts and Allowances

Schedule I – Valuation and Qualifying Accounts and Allowances

 

         
     

Balance at
Beginning of

the period

     

Additions

during the

period

      Write-offs    

Balance at End

of period

  

Deferred tax valuation allowance

           

Fiscal year 2020

    $ —        1,906        —     $ 1,906  

Fiscal year 2019

    $ —        —        —     $ —  

Fiscal year 2018

    $ —        —        —     $ —  

Allowance for doubtful accounts

           

Fiscal year 2020

    $ 302        526        (388 )    $ 441  

Fiscal year 2019

    $ 480        354        (532 )    $ 302  

Fiscal year 2018

    $ 40        532        (92 )    $ 480