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Schedule II - Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts
          Additions              
    Balance at     (Reductions)     (1)     Balance at  
    Beginning     Charged to     Deductions     end  
Description   of Period     Operations     Other     of Period  
2019                        
Allowance for doubtful accounts   $ -       -       25     $ 25  
Allowance for doubtful notes   $ 869       -       -     $ 869  
Tax valuation allowance (2)   $ 11,031          -       5,996     $ 17,027  
                                 
2020                                
Allowance for doubtful accounts   $ 25       -       250     $ 275  
Allowance for doubtful notes   $ 869       -       -     $ 869  
Tax valuation allowance   $ 17,027       -       6,657     $ 23,684  

 

(1) Includes payments and actual write offs, as well as changes in estimates in the reserves.
(2) Opening balance has been adjusted to reflect the impact of the immaterial revision described in Note 1.