Annual report pursuant to Section 13 and 15(d)

Income Taxes - Valuation allowance on the deferred income tax assets (Details)

v3.21.1
Income Taxes - Valuation allowance on the deferred income tax assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Taxes    
Increase (decrease) in valuation allowance $ (86,359) $ (30,588)
Beginning balance (41,844) (11,256)
Additions charged to income tax provision (86,359) (30,588)
Ending balance $ (128,203) $ (41,844)