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Net Loss per Share (Tables)
12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Shares not included in computation of diluted net loss per share
The following shares were not included in the computation of diluted net loss per share (in thousands):
 Year Ended December 31,
 201920182017
Shares issuable under Equity Incentive Plan4,763  6,339  6,882