Transactions with Related Parties - Summary of Amounts Reimbursable to AFCA 2, the General Partner of AFCA 2, or an Affiliate (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Amounts reimbursable to related party	$ 344,000	$ 301,000
General Partner [Member]
Related Party Transaction [Line Items]
Amounts reimbursable to related party	5,358,025	5,066,741
General Partner [Member] | Reimbursable Salaries and Benefits [Member]
Related Party Transaction [Line Items]
Amounts reimbursable to related party	4,625,222	4,702,754
General Partner [Member] | Other Expenses [Member]
Related Party Transaction [Line Items]
Amounts reimbursable to related party	57,424	19,622
General Partner [Member] | Office Expenses [Member]
Related Party Transaction [Line Items]
Amounts reimbursable to related party	257,641	17,630
General Partner [Member] | Insurance [Member]
Related Party Transaction [Line Items]
Amounts reimbursable to related party	312,530	243,773
General Partner [Member] | Professional Fees and Expenses [Member]
Related Party Transaction [Line Items]
Amounts reimbursable to related party	$ 105,208	$ 82,962