Note 9 - Operating and Management Expenses (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Other General and Administrative Expense	$ 353,000	$ 327,500
Salary and Wage, NonOfficer, Excluding Cost of Good and Service Sold	493,250	504,150
Director [Member]
Salary and Wage, NonOfficer, Excluding Cost of Good and Service Sold	$ 70,000	$ 70,000
Maximum [Member]
Termination Notice for Management Agreement	90 days
Minimum [Member]
Termination Notice for Management Agreement	60 days