Note 9 - Stock-based Awards (Details) - USD ($)	3 Months Ended		6 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Other general and administrative	$ 155,588	$ 328,032	$ 288,092	$ 401,118
Options issued incentives
Options issued	1,600,000
Options price per share	0.17
Options issued price fair value	$ 192,000
Options issued consultant
Options issued		250,000
Options price per share		0.33
Options vested in period		62,500
Other general and administrative		$ 15,000			$ 45,000
Options not vested in period		187,500
Options issued employees
Salaries, Wages and Officers' Compensation	120,000	$ 0	120,000	$ 0
Options issued nonemployees
Other general and administrative	$ 15,000		$ 87,000