Notes Payable and Accrued Interest (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Unamortized debt issuance costs	$ (3,825,700)	$ (674,300)
Notes payable and accrued interest	111,638,400	131,092,200
Special Purpose Financing
Unamortized debt issuance costs	(741,500)	0
Accrued interest	89,300	16,000
MUFG Credit Facility
Principal	84,084,100	122,400,000
Unamortized debt issuance costs	(3,084,200)	(674,300)
Accrued interest	376,200	139,300
UK SPE Financing | Special Purpose Financing
Principal	0	9,211,200
Nord Term Loans | Special Purpose Financing
Principal	$ 30,914,500	$ 0