Consolidated Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2023	Dec. 31, 2022
Class A common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	21,512,970	19,528,066
Common stock, shares outstanding (in shares)	21,512,970	19,528,066
Class B common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	27,206	27,206
Common stock, shares issued (in shares)	27,206	27,206
Common stock, shares outstanding (in shares)	27,206	27,206