Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 9,342,425	$ 11,469,915
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	1,828,131	2,863,205
Gain on sale of real estate assets, net		(7,152,512)
Impairment of securities	831,062
Loss (gain) on derivatives, net of cash paid	(1,127,589)	302,769
Restricted unit compensation expense	750,157	609,733
Bond premium/discount amortization	(33,987)	(74,873)
Amortization of deferred financing costs	895,459	1,302,823
Deferred income tax expense (benefit) & income tax payable	(183,303)	(365,000)
Change in preferred return receivable from unconsolidated entities	(1,799,127)	(1,343,013)
Changes in operating assets and liabilities
(Increase) decrease in interest receivable	(1,141,448)	585,695
Increase in other assets	(928,527)	(40,101)
Increase (decrease) in accounts payable and accrued expenses	(516,061)	50,585
Net cash provided by operating activities	7,917,192	8,209,226
Cash flows from investing activities:
Capital expenditures	(431,784)	(175,193)
Proceeds from sale of MF Properties		13,750,000
Proceeds from sale of land held for development		3,000,000
Acquisition of mortgage revenue bonds	(19,540,000)	(59,585,000)
Contributions to unconsolidated entities	(16,488,929)	(8,017,189)
Principal payments received on taxable mortgage revenue bonds	30,526	27,864
Cash paid for land held for development and deposits on potential purchases	(2,660,649)	(95,932)
Advances on property loans	(66,651)	(2,340,636)
Principal payments received on property loans	650,000	500,000
Net cash used in investing activities	(14,995,196)	(50,495,805)
Cash flows from financing activities:
Distributions paid	(17,458,416)	(17,288,919)
Proceeds from the sale of redeemable Series A Preferred Units		16,131,000
Payment of offering costs related to the sale of redeemable Series A Preferred Units		(668)
Acquisition of interest rate derivatives		(496,800)
Repurchase of Beneficial Unit Certificates	(1,697,613)	(1,466,222)
Proceeds from the sale of Beneficial Unit Certificates	233,633
Payment of offering costs related to the sale of Beneficial Unit Certificates	(4,678)
Payment of tax withholding related to restricted unit awards		(153,306)
Distribution to noncontrolling interest		(76,316)
Proceeds from debt financing		135,100,000
Principal payments on debt financing	(16,924,182)	(32,751,484)
Principal payments on mortgages payable	(380,775)	(658,271)
Principal borrowing on unsecured lines of credit	19,540,000	24,460,000
Principal payments on unsecured and secured lines of credit	(20,000,000)	(84,460,000)
Increase (decrease) in security deposit liability related to restricted cash	17,168	(92,951)
Debt financing and other deferred costs	(8,670)	(1,452,517)
Net cash provided by (used in) financing activities	(36,683,533)	36,793,546
Net decrease in cash, cash equivalents and restricted cash	(43,761,537)	(5,493,033)
Cash, cash equivalents and restricted cash at beginning of period	71,583,329	27,506,220
Cash, cash equivalents and restricted cash at end of period	27,821,792	22,013,187
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	11,702,009	10,670,383
Cash paid during the period for income taxes	162,963	3,007,000
Supplemental disclosure of noncash investing and financing activities:
Distributions declared but not paid for Beneficial Unit Certificates and general partner	7,632,945	7,623,425
Distributions declared but not paid for Series A Preferred Units	708,750	427,500
Land contributed as investment in an unconsolidated entity	2,597,784	3,091,023
Capital expenditures financed through accounts payable	24,491	54,320
Deferred financing costs financed through accounts payable	19,626
Public housing capital fund trusts [Member]
Cash flows from investing activities:
Principal payments received	226,714	437,000
Mortgage Revenue Bonds [Member]
Cash flows from investing activities:
Principal payments received	$ 23,285,577	$ 2,003,281