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Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - $ / shares
Jun. 30, 2022
Dec. 31, 2021
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized (in shares) 600,000,000 600,000,000
Common stock, issued (in shares) 16,238,739 6,381,541
Common stock, outstanding (in shares) 16,238,739 6,381,541