Note 12 - Stockholders' Equity (Details Textual) - USD ($)			12 Months Ended
	Aug. 15, 2019	Feb. 07, 2019	Jun. 30, 2020	Jun. 30, 2019
Conversion of Stock, Shares Issued (in shares)		7,678,380
Stock Issued During Period, Shares, Issued for Services (in shares)	175,000
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001		$ 0.001	$ 0.001
Share Price (in dollars per share)	$ 0.87
Stock Issued During Period, Value, Issued For Services Fair Value	$ 152,250
Shares Issued For Services [Member]
Share-based Payment Arrangement, Expense			$ 152,075
Shares Issued, Price Per Share (in dollars per share)			$ 175
Series B Convertible Preferred Stock [Member]
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)			20
Conversion of Stock, Shares Converted (in shares)		383,919
Preferred Stock, Shares Outstanding, Ending Balance (in shares)			53,032