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Net loss per share
12 Months Ended
Dec. 31, 2020
Earnings Per Share [Abstract]  
Net loss per share Net loss per share
The following common stock equivalents were excluded from the calculation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect (in thousands):
Year ended December 31, 2020,
202020192018
Outstanding stock options6,262 5,483 4,643 
Restricted stock units1,495 1,127 931 
ESPP shares and other326 19 10 
8,083 6,629 5,584