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Significant Events and Transactions of the Period - Schedule of Restructuring Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Closing R&D Operations In Palo Alto    
Restructuring Cost and Reserve [Line Items]    
Restructuring costs $ (50) $ (497)
New Organization Structure    
Restructuring Cost and Reserve [Line Items]    
Restructuring costs $ (400) $ (1,133)