Note 10 - Related Party Transactions - Notes Payable (Details) (Parentheticals)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Notes Payable Due on December 31, 2012 [Member]
Notes payable, interest rate	8.00%	8.00%
Notes payable, maturity date	Dec. 31, 2012	Dec. 31, 2012
Notes Payable Due on May 25, 2022 [Member]
Notes payable, interest rate	4.00%	4.00%
Notes payable, maturity date	May 25, 2022	May 25, 2022
Notes Payable Due on April 8, 2022 [Member]
Notes payable, interest rate	4.00%	4.00%
Notes payable, maturity date	Apr. 08, 2022	Apr. 08, 2022