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Statements of Comprehensive Loss - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Statements of Comprehensive Loss    
Net loss $ (12,369) $ (8,730)
Other comprehensive income    
Unrealized gain on marketable securities 91  
Other comprehensive income, net of tax 91  
Comprehensive income (loss), net of tax $ (12,278) $ (8,730)