Consolidated Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2022	Dec. 31, 2021
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)	19,014,571	18,564,421
Common stock, shares outstanding (in shares)	19,014,571	18,564,421
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