Operating Segments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating lease revenue	$ 25,609,000	$ 27,637,500
Finance lease revenue	852,600	1,251,000
Africa
Finance lease revenue	48,700	832,800
Europe and United Kingdom
Operating lease revenue	15,174,900	16,258,800
Finance lease revenue	365,600	418,200
North America
Operating lease revenue	10,119,100	10,119,100
Asia
Operating lease revenue	$ 315,000	$ 1,259,600