Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Dec. 31, 2018	Sep. 30, 2018
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)	14,081,259	4,241,225
Common stock, shares outstanding (in shares)	14,081,259	4,241,225
Series A Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	264,000	264,000
Preferred stock, shares outstanding (in shares)	262,310	262,364
Preferred stock, liquidation preference	$ 2,624	$ 2,624
Series B Convertible Preferred Stock [Member]
Preferred stock, shares issued (in shares)	4,288	0
Preferred stock, shares outstanding (in shares)	80	0