Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares shares in Thousands	Sep. 30, 2023	Dec. 31, 2022
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	480,000	480,000
Common stock, shares issued (in shares)	256,500	143,500
Common stock, shares outstanding (in shares)	256,500	143,500
Treasury stock, common shares (in shares)	2,200	1,000
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	500	500
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Series A Convertible Preferred Stock [Member]
Temporary equity, liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Temporary equity, shares issued (in shares)	0	82,948
Temporary equity, shares outstanding (in shares)	0	82,948
Series B Convertible Preferred Stock [Member]
Temporary equity, liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Temporary equity, shares issued (in shares)	0	79,239
Temporary equity, shares outstanding (in shares)	0	79,239
Series C Convertible Preferred Stock [Member]
Temporary equity, liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Temporary equity, shares issued (in shares)	0	59,366
Temporary equity, shares outstanding (in shares)	0	59,366