Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jun. 30, 2022	Sep. 30, 2021
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Series C Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 1,000
Preferred stock, shares authorized (in shares)	11,000	11,000
Preferred stock, shares issued (in shares)	350	350
Preferred stock, shares outstanding (in shares)	350	350
Series D Convertible Preferred Stock [Member]
Preferred stock, shares authorized (in shares)	4,200	4,200
Preferred stock, shares outstanding (in shares)	0	0
Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	10,217,609	10,187,128
Common stock, shares outstanding (in shares)	10,217,609	10,187,128