Note 10 - Stock-based Awards (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017
Compensation			$ 120,000
Other general and administrative expenses	$ 16,000	$ 15,000	103,000	$ 30,000
Stock Issued During Period, Value, Share-based Compensation, Gross	$ 16,000	$ 15,000	$ 223,000	$ 30,000
Outstanding at September 30, 2017					2,233,334
Weighted Average Exercise Price, Exercisable	$ 0.26		$ 0.26		$ 0.41
Granted			1,800,000
Weighted Average Exercise Price, Granted			$ 0.16
Expired			(853,334)
Weighted Average Exercise Price, Expired			$ (0.43)
Exercisable	3,180,000		3,180,000
Weighted average fair value of options granted	$ 0.08
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	3 years 8 months 26 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 4,000		$ 4,000
Closing price per share	$ 0.12		$ 0.12
Options issued directors
Options issued directors	200,000
Options price per share	0.10
Options issued price fair value	$ 16,000
Options issued directors, vested		62,500
Options issued price fair value, vested		$ 15,000
Options issued employees and directors
Options price per share			0.16
Options issued price fair value			$ 223,000
Options issued directors and employees			1,800,000
Options issued consultant
Options price per share				0.33
Options issued price fair value, vested				$ 30,000
Options issued directors and employees				250,000