Condensed Consolidated Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2022	Dec. 31, 2021
Condensed Consolidated Balance Sheets
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	80,000,000	80,000,000
Common stock, shares issued (in shares)	64,460,394	52,287,737
Common stock, shares outstanding (in shares)	64,460,394	52,287,737