Notes Payable and Accrued Interest (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Unamortized debt issuance costs	$ (4,596,800)	$ (674,300)
Notes payable and accrued interest	117,682,700	131,092,200
Special Purpose Financing
Unamortized debt issuance costs		0
Accrued interest		16,000
Credit Facility
Principal	83,200,000	122,400,000
Unamortized debt issuance costs	(3,570,500)	(674,300)
Accrued interest	181,300	139,300
UK SPE Financing | Special Purpose Financing
Principal	0	9,211,200
Unamortized debt issuance costs	(1,026,300)
Accrued interest	101,300
Term Loans | Special Purpose Financing
Principal	$ 38,796,900	$ 0