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Consolidated Balance Sheets (Parentheticals) - $ / shares
Dec. 31, 2022
Dec. 31, 2021
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares authorized (in shares) 115,000,000 115,000,000
Common stock, shares outstanding (in shares) 20,447,371 14,433,286
Common stock, shares issued (in shares) 20,447,371 14,433,286