Transactions with Related Parties - Summary of Transactions Between Borrowers of Partnership's MRBs and Affiliates (Details) - General Partner [Member] - USD ($)		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Non-partnership property administrative fee received	[1]	$ 9,000	$ 9,000
Investment/mortgage fees received	[2]	$ 542,000	$ 91,000

[1] AFCA 2 received administrative fees directly from the owners of certain properties financed by certain MRBs held by the Partnership.  These administrative fees equal 0.45% per annum of the outstanding principal balance of the MRBs. These amounts represent administrative fees received by AFCA 2 during the periods specified.

[2] AFCA 2 received placement fees in connection with the acquisition of certain MRBs and investments in unconsolidated entities.