Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Preferred stock, par value (in dollars per share)	$ 0.0001		$ 0.0001
Preferred stock, shares authorized (in shares)	10,000,000		10,000,000
Preferred stock, shares outstanding (in shares)		0	0
Preferred Stock, Shares Issued (in shares)		0	0
Common stock, par value (in dollars per share)	$ 0.0001		$ 0.0001
Common stock, shares authorized (in shares)	600,000,000		600,000,000
Common Stock, Shares, Issued (in shares)	128,220,923		113,165,027
Common stock, shares outstanding (in shares)	128,220,923		113,165,027