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Consolidated Statement of Stockholders' Equity (Deficit) (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]      
Common stock cash paid (USD per share) $ 0.20 $ 0.20 $ 0.75