Sale of property (Details)	Dec. 31, 2019 USD ($)
Notes to Financial Statements
Proceeds received	$ 4,975,174
Less: closing costs	(182,344)
Provision for additional expenses	(36,470)
Net proceeds received	4,756,360
Assets sold:
Land	2,753,928
Buildings thereon, net of depreciation	2,949,452
Furniture and fixtures, net of depreciation	72,792
Total	5,776,172
Loss on disposal of property	$ 1,019,812