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Net Earnings Per Share - Reconciliation (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]                      
Net income (loss) $ 39,072 $ 4,822 $ (1,064) $ 3,629 $ (4,400) $ (8,210) $ 1,520 $ 2,521 $ 46,459 $ (8,569) $ 661
Less: Income from discontinued operations, net of income tax                     (5,777)
Less: Deemed dividends on convertible preferred stock                     (425)
Net income (loss) attributable to common stockholders $ 39,072 $ 4,822 $ (1,064) $ 3,629 $ (4,400) $ (8,210)   $ 31 $ 46,459 $ (8,569) $ (5,541)
Weighted Average Number of Shares Outstanding, Basic [Abstract]                      
Weighted-average shares used in computing basic net income (loss) per share attributable to common stockholders (in shares) 86,514,619 86,265,297 85,281,151 84,537,538 64,192,100 7,472,469 5,172,209 15,120,928 85,722,670 20,735,202 5,539,739
Earnings Per Share, Basic [Abstract]                      
Basic net income (loss) per share attributable to common stockholders (in dollars per share)                 $ 0.54 $ (0.41) $ (1.00)
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]                      
Net income (loss) attributable to common stockholders $ 39,072 $ 4,822 $ (1,064) $ 3,629 $ (4,400) $ (8,210)   $ 31 $ 46,459 $ (8,569) $ (5,541)
Diluted net income (loss) attributable to common stockholders                 $ 46,459 $ (8,569) $ (5,541)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]                      
Weighted-average shares used in computing basic net income (loss) per share attributable to common stockholders (in shares) 86,514,619 86,265,297 85,281,151 84,537,538 64,192,100 7,472,469 5,172,209 15,120,928 85,722,670 20,735,202 5,539,739
Effect of dilutive securities (in shares)                 13,332,856    
Weighted-average shares used in computing diluted net (loss) income per share attributable to common stockholders (in shares) 99,021,233 98,969,588 85,281,151 99,665,158 64,192,100 7,472,469 5,172,209 15,120,928 99,055,526 20,735,202 5,539,739
Earnings Per Share, Diluted [Abstract]                      
Diluted net income (loss) per share attributable to common stockholders (in dollars per share)                 $ 0.47 $ (0.41) $ (1.00)