Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 2,531,688	$ 2,523,588
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	2,124,898	1,693,299
Gain on sale of securities	(8,097)
Non-cash loss on derivatives	1,110,407	899,873
Bond premium/discount amortization	(33,573)	(36,933)
Amortization of deferred financing costs	532,187	338,599
Changes in operating assets and liabilities, net of effect of acquisitions
Increase in interest receivable	(793,661)	(1,684,804)
(Increase) Decrease in other assets	(354,030)	127,115
(Decrease) Increase in accounts payable and accrued expenses	(244,234)	311,641
Net cash provided by operating activities	4,865,585	4,172,378
Cash flows from investing activities:
Capital expenditures	(157,084)	(91,968)
Acquisition of mortgage revenue bonds	(11,500,000)	(58,945,000)
Proceeds from sale of mortgage revenue bond	9,295,000
Proceeds from the sale of MBS Securities	14,997,069
Contributions to an unconsolidated entity	(2,442,846)
Restricted cash - debt collateral paid	(750,000)	1,370,000
Restricted cash - debt collateral released	484,334
(Increase) decrease in restricted cash	134,615	(46,780)
Principal payments received on mortgage revenue bonds	1,523,757	202,888
Restructure and acquisition of interest rate derivative		10,500
Funding of notes receivable	(5,836,758)	(39,337)
Repayments of notes receivable	8,516
Net cash provided by (used in) investing activities	6,084,465	(55,065,448)
Cash flows from financing activities:
Distributions paid	(8,759,343)	(7,617,390)
Proceeds from the sale of redeemable Series A Preferred Units	10,000,000
Payment of offering costs related to the sale of redeemable Series A preferred units	(19,052)
Proceeds from debt financing		48,285,000
Principal payments on debt financing	(21,600,363)	(25,761,768)
Principal borrowing on other secured financing		1,425,261
Principal payments on mortgages payable	(234,752)	(262,383)
Principal borrowing on unsecured lines of credit	15,487,639	10,000,000
Principal payments on unsecured lines of credit	(5,000,000)
Decrease in security deposit liability	62,399	46,780
Debt financing and other deferred costs	(99,907)	(210,526)
Net cash (used in) provided by financing activities	(10,163,379)	25,904,974
Net increase (decrease) in cash and cash equivalents	786,671	(24,988,096)
Cash and cash equivalents at beginning of year, including cash and cash equivalents of discontinued operations of $0 and $35,772, respectively	17,035,782	49,193,343
Cash and cash equivalents at end of year, including cash and cash equivalents of discontinued operations of $0 and $25,023, respectively	17,822,453	24,205,247
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	3,646,802	2,833,471
Supplemental disclosure of non cash investing and financing activities:
Distributions declared but not paid	7,609,360	7,607,693
Capital expenditures financed through accounts and notes payable	17,360	56,806
M24, M31 and M33 TEBS Financing Facilities [Member]
Cash flows from investing activities:
(Increase) decrease in restricted cash	$ 327,862	$ 2,474,249