XML 61 R43.htm IDEA: XBRL DOCUMENT v3.22.0.1
Balance Sheets Components - Billing Reserve (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Changes in Billing Reserve      
Balance, beginning of period $ 1,034 $ 398 $ 440
Charges to revenue 1,780 1,922 516
Write-offs and other adjustments (1,709) (1,286) (558)
Balance, end of period $ 1,105 $ 1,034 $ 398