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Expected Credit Losses - Type Of Customer Receivable (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Expected Credit Losses    
Accounts receivable and notes receivable, current $ 1,927 $ 2,203
Contract assets, net 1,058 1,010
Long-term notes receivable, net of current portion 148 136
Total allowance for expected credit losses on customer receivables $ 3,133 $ 3,349