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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2021
Dec. 31, 2020
CONSOLIDATED BALANCE SHEETS    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized shares 240,000,000 240,000,000
Common stock, issued shares 88,318,454 59,657,742
Common stock, outstanding shares 88,318,454 59,657,742