Note 6 - Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Accrued management salaries	$ 1,418,797	$ 1,323,483
Accrued directors’ fees	436,920	409,219
Other accrued expenses	61,708	118,338
Total accrued expenses	$ 1,917,425	$ 1,851,040