Accounts Payable, Accrued Expenses and Other Liabilities - Summary of Partnership's Accounts Payable, Accrued Expenses and Other Liabilities (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Payables And Accruals [Abstract]
Accounts payable	$ 94,674	$ 93,834
Accrued expenses	2,755,010	2,529,982
Accrued interest expense	3,433,247	2,690,076
Operating lease liabilities	$ 2,149,001	$ 2,138,783
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
Other liabilities	$ 1,517,633	$ 1,583,492
Total accounts payable, accrued expenses and other liabilities	$ 9,949,565	$ 9,036,167