Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 23,783,684	$ 26,606,222	$ 15,029,188
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	6,862,530	6,505,011	5,837,973
Provision for loan loss	0	0	75,000
Gain on sale of MF Property	(14,072,317)	(4,599,109)
Gain on mortgage revenue bonds - redemption			(3,701,772)
Gain on the sale of discontinued operations		(3,212,447)
Contingent interest realized on investing activities	(1,379,466)	(4,756,716)	(40,000)
Note interest income realized from the sale of Fairmont Oaks, Consolidated VIE		(1,454,621)
Gain on sale of securities	(8,097)		(3,701,772)
Non-cash (gain) loss on derivatives	(17,618)	1,802,655	1,282,369
Restricted unit compensation expense	833,142
Bond premium/discount amortization	(153,922)	238,996	(181,208)
Amortization of deferred financing costs	1,862,509	1,622,789	1,183,584
Deferred income tax expense	366,000
Change in preferred return receivable from unconsolidated entities	(718,701)
Changes in operating assets and liabilities, net of effect of acquisitions
Increase in interest receivable	(1,762,344)	(2,452,084)	(1,074,623)
(Increase) decrease in other assets	(112,174)	(416,419)	(24,276)
(Decrease) increase in accounts payable and accrued expenses	(251,695)	(496,859)	(942,064)
Net cash provided by operating activities	15,231,531	19,387,418	17,444,171
Cash flows from investing activities:
Capital expenditures	(635,739)	(3,282,107)	(23,798,209)
Restructure and acquisition of interest rate derivative		(562,088)	(1,382,900)
Proceeds from sale of MF Properties	45,850,000	16,196,510
Proceeds from sale of discontinued operations		22,900,000
Proceeds from sale of mortgage revenue bond	9,295,000		31,791,699
Proceeds from the sale of MBS Securities	14,997,069		28,606,311
Cash realized from the bond exchange for the Suites on Paseo property		514,095
Acquisition of mortgage revenue bonds	(130,620,000)	(188,572,000)	(142,794,827)
Contributions to unconsolidated entities	(18,751,305)
Acquisition of MF Property	(9,882,800)
Restricted cash - debt collateral paid	(2,564,000)	(4,815,000)	(6,252,027)
Restricted cash - debt collateral released	4,429,019	7,522,959	1,699,973
Decrease (increase) in restricted cash	342,609	(16,004)	(475,208)
Acquisition of taxable bonds		(500,000)
Principal payments received on taxable bonds	551,162	153,821	145,000
Principal payments received on MBSs			85,000
Cash paid for land held for development and deposits on potentail purchases	(100,000)	(2,889,400)
Advances on property loans	(8,414,215)	(11,208,763)	(710,118)
Principal payments received on property loans and related contingent interest	2,806,056	2,958,415	68,530
Net cash used in investing activities	(83,052,386)	(138,703,473)	(105,887,640)
Cash flows from financing activities:
Distributions paid	(34,245,664)	(31,556,898)	(30,168,167)
Proceeds from the sale of redeemable Series A Preferred Units	40,869,000
Payment of offering costs related to the sale of redeemable Series A preferred units	(86,814)
Repurchase of beneficial unit certificates	(1,603,658)
Proceeds from the sale of beneficial unit certificates			54,740,000
Payment of offering costs related to the sale of beneficial unit certificates			(3,451,301)
Proceeds from debt financing	173,302,645	293,205,000	186,815,000
Principal payments on debt financing	(129,465,032)	(182,132,712)	(98,730,000)
Principal payments on other secured financing	(7,500,000)
Principal borrowing on mortgages payable	7,500,000		22,622,552
Principal payments on mortgages payable	(17,997,186)	(8,415,981)	(3,056,763)
Principal borrowing on unsecured and secured lines of credit	87,487,639	74,071,261
Principal payments on unsecured lines of credit	(44,984,639)	(55,149,000)
Increase (decrease) in security deposit liability related to restricted cash	(44,984)	16,004	475,208
Deferred costs related to future equity raises		(169,667)
Debt financing and other deferred costs	(1,697,713)	(2,709,513)	(2,927,732)
Net cash provided by financing activities	71,533,594	87,158,494	126,318,797
Net increase (decrease) in cash and cash equivalents	3,712,739	(32,157,561)	37,875,328
Cash and cash equivalents at beginning of period, including cash and cash equivalents of assets held for sale and discontinued operations of $0, $35,772 and $25,976, respectively	17,035,782	49,193,343	11,318,015
Cash and cash equivalents at end of period, including cash and cash equivalents of discontinued operations of $0, $0 and $35,772, respectively	20,748,521	17,035,782	49,193,343
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	15,175,628	12,866,079	9,112,063
Cash paid during the period for income taxes	4,615,000
Supplemental disclosure of non cash investing and financing activities:
Distributions declared but not paid for beneficial unit certificates and general partner	8,017,950	8,759,343	7,617,390
Distributions declared but not paid for Series A Preferred Units	271,518
Capital expenditures financed through accounts payable	46,528	26,368	137,759
Liabilities assumed in the acquisition of MF Property	135,326
Deferred financing costs financed through accounts payable	234,372
Beneficial unit certificates surrendered for tax withholding liabilities on restricted units	153,306
Exchange of Suites on Paseo assets held for the Suites on Paseo property		42,665,912
Public housing capital fund trusts [Member]
Cash flows from investing activities:
Principal payments received	2,014,120	963,526	5,956,305
Mortgage Revenue Bonds [Member]
Cash flows from investing activities:
Principal payments received	$ 7,630,638	$ 21,932,563	$ 1,172,831