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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
Stockholders equity    
Common stock, par value $ 0.01 $ 0.01
Common stock, authorized 40,000,000 40,000,000
Common stock, issued 35,074,922 20,929,928
Common stock, outstanding 35,074,922 20,929,928