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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Mar. 31, 2022
Dec. 31, 2021
Stockholders’ equity:    
Convertible preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Convertible preferred stock, authorized shares 5,000,000 5,000,000
Convertible preferred stock, issued shares 0 0
Convertible preferred stock, outstanding shares 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized shares 500,000,000 500,000,000
Common stock, issued shares 110,235,608 109,292,235
Common stock, outstanding shares 110,235,608 109,292,235