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Earnings per Share - Calculation of Basic and Diluted Earnings per Share (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
Earnings Per Share [Abstract]                    
Net loss attributable to common stockholders $ (13,593) $ (6,271) $ (75,665) $ (18,590) $ (13,285) $ (8,937) $ (10,779) $ (7,485) $ (114,119) $ (40,486)
Weighted-average common shares outstanding, basic and diluted (in shares)                 96,111,547 78,322,496
Basic and diluted net loss per share (in dollars per share) $ (0.14) $ (0.06) $ (0.78) $ (0.20) $ (0.17) $ (0.11) $ (0.14) $ (0.10) $ (1.19) $ (0.52)