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Balance Sheet Details (Details 3) - USD ($)
$ in Thousands
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Accumulated other comprehensive income (Loss)            
Foreign currency translation adjustments, net of tax $ 129       $ 105  
Unrealized gain (loss) on available-for-sale securities, net of tax (210)       (197)  
Total $ (81) $ (132) $ (52) $ (188) $ (92) $ (12,460)