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Net Loss Per Share - Summary of Outstanding Shares of Common Stock Equivalents (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Earnings Per Share Diluted [Line Items]        
Net income (loss) $ 6,464 $ 173 $ 9,975 $ (17,870)
Weighted-average shares outstanding - basic (in shares) 78,235 76,618 78,158 75,611
Weighted Average Number Diluted Shares Outstanding Adjustment 2,189 2,475 2,074 0
Weighted-average shares outstanding - diluted (in shares) 80,424 79,093 80,232 75,611
Basic $ 0.08 $ 0 $ 0.13 $ (0.24)
Diluted $ 0.08 $ 0 $ 0.12 $ (0.24)
Stock options, restricted stock units and employee stock purchase rights        
Earnings Per Share Diluted [Line Items]        
Anti-dilutive securities excluded from computation of diluted net income per share 515 9,290 887 9,235