CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Class A Common Stock [Member]	Class C Common Stock [Member]	Class B-3 Common Stock [Member]	Series D Preferred Stock [Member]	Additional Paid-in Capital [Member]	Cumulative Distributions [Member]	Net Loss to Common Stockholders [Member]	Noncontrolling Interests [Member]
Balance at Dec. 31, 2015	$ 237,712	$ 192	$ 0	$ 4	$ 0	$ 248,484	$ (32,001)	$ (9,495)	$ 30,528
Balance (in shares) at Dec. 31, 2015		19,202,112	0	353,629	0
Issuance of Class A common stock, net	51	$ 0	$ 0	$ 0	$ 0	51	0	0	0
Issuance of Class A common stock, net (in shares)		4,265	0	0	0
Conversion of Class B-3 shares into Class A	0	$ 4	$ 0	$ (4)	$ 0	0	0	0	0
Conversion of Class B-3 shares into Class A (in shares)		353,629	0	(353,629)	0
Vesting of restricted stock compensation	133	$ 0	$ 0	$ 0	$ 0	133	0	0	0
Issuance of Long-Term Incentive Plan ("LTIP") units for director compensation	77		$ 0	$ 0	$ 0	77	0	0	0
Issuance of Long-Term Incentive Plan ("LTIP") units for director compensation (in shares)		7,500	0	0	0
Issuance of LTIP units for compensation	2,821	$ 0	$ 0	$ 0	$ 0	2,821	0	0	0
Issuance of LTIP units for compensation (in shares)		0	0	0	0
Issuance of LTIP units	5,770	$ 0	$ 0	$ 0	$ 0	5,770	0	0	0
Issuance of Series B warrants	275	0	0	0	0	275	0	0	0
Contributions from noncontrolling interests, net	25,009	0	0	0	0	0	0	0	25,009
Distributions declared	(24,502)	0	0	0	0	0	(24,150)	0	(352)
Series A Preferred Stock distributions declared	(10,333)	0	0	0	0	0	(10,333)	0	0
Series A Preferred Stock accretion	(627)	0	0	0	0	0	(627)	0	0
Series B Preferred Stock distributions declared	(321)	0	0	0	0	0	(321)	0	0
Series B Preferred Stock accretion	(149)	0	0	0	0	0	(149)	0	0
Series C Preferred Stock distributions declared	(2,009)	0	0	0	0	0	(2,009)	0	0
Series C Preferred Stock accretion	(117)	0	0	0	0	0	(117)	0	0
Issuance costs of Series D Preferred Stock	68,760	$ 0	$ 0	$ 0	$ 68,760	0	0	0	0
Issuance costs of Series D Preferred Stock (in shares)		0	0	0	2,850,602
Series D Preferred Stock distributions declared	(1,100)	$ 0	$ 0	$ 0	$ 0	0	(1,100)	0	0
Distributions to noncontrolling interests	(3,626)	0	0	0	0	0	0	0	(3,626)
Cash redemption of Operating Partnership units	(101)	0	0	0	0	(37)	0	0	(64)
Noncontrolling interest related to sale of Springhouse at Newport News	(1,997)	0	0	0	0	20	0	0	(2,017)
Noncontrolling interest related to sale of EOS	(191)	0	0	0	0	(191)	0	0	0
Net (loss) income	(2,974)	0	0	0	0	0	0	(4,329)	1,355
Balance at Dec. 31, 2016	292,561	$ 196	$ 0	$ 0	$ 68,760	257,403	(70,807)	(13,824)	50,833
Balance (in shares) at Dec. 31, 2016		19,567,506	0	0	2,850,602
Issuance of Class A common stock, net	57,376	$ 46	$ 0	$ 0	$ 0	57,330	0	0	0
Issuance of Class A common stock, net (in shares)		4,604,701	0	0	0
Issuance of Class C common stock	815	$ 0	$ 1	$ 0	$ 0	814	0	0	0
Issuance of Class C common stock (in shares)		0	76,603	0	0
Vesting of restricted stock compensation	9	$ 0	$ 0	$ 0	$ 0	9	0	0	0
Issuance of Long-Term Incentive Plan ("LTIP") units for director compensation	100	$ 0	$ 0	$ 0	$ 0	100	0	0	0
Issuance of Long-Term Incentive Plan ("LTIP") units for director compensation (in shares)		0	0	0	0
Issuance of OP Units for Internalization	39,938	$ 0	$ 0	$ 0	$ 0	0	0	0	39,938
Issuance of LTIP units for compensation	2,187	$ 0	$ 0	$ 0	$ 0	2,187	0	0	0
Issuance of LTIP units for compensation (in shares)		0	0	0	0
Issuance of LTIP units	13,748	$ 0	$ 0	$ 0	$ 0	13,748	0	0	0
Issuance of Series B warrants	3,072	0	0	0	0	3,072	0	0	0
Contributions from noncontrolling interests, net	10,738	0	0	0	0	0	0	0	10,738
Distributions declared	(36,675)	0	0	0	0	0	(33,976)	0	(2,699)
Series A Preferred Stock distributions declared	(11,801)	0	0	0	0	0	(11,801)	0	0
Series A Preferred Stock accretion	(658)	0	0	0	0	0	(658)	0	0
Series B Preferred Stock distributions declared	(5,715)	0	0	0	0	0	(5,715)	0	0
Series B Preferred Stock accretion	(2,104)	0	0	0	0	0	(2,104)	0	0
Series C Preferred Stock distributions declared	(4,430)	0	0	0	0	0	(4,430)	0	0
Series C Preferred Stock accretion	(249)	0	0	0	0	0	(249)	0	0
Issuance costs of Series D Preferred Stock	(55)	$ 0	$ 0	$ 0	$ (55)	0	0	0	0
Issuance costs of Series D Preferred Stock (in shares)		0	0	0	0
Series D Preferred Stock distributions declared	(5,077)	$ 0	$ 0	$ 0	$ 0	0	(5,077)	0	0
Distributions to noncontrolling interests	(30,252)	0	0	0	0	0	0	0	(30,252)
Cash redemption of Operating Partnership units	(45)	0	0	0	0	(16)	0	0	(29)
Redemption of Series B Preferred Stock and conversion into Class A common stock	267	$ 0	$ 0	$ 0	$ 0	267	0	0	0
Redemption of Series B Preferred Stock and conversion into Class A common stock (in shares)		23,785	0	0	0
Cash redemption of Series B Preferred Stock	33	$ 0	$ 0	$ 0	$ 0	33	0	0	0
Conversion of OP Units into Class A common stock	0	$ 0	$ 0	$ 0	$ 0	167	0	0	(167)
Conversion of OP Units into Class A common stock (in shares)		22,367	0	0	0
Transfer of noncontrolling interest to controlling interest	(3,825)	$ 0	$ 0	$ 0	$ 0	0	0	0	(3,825)
Conversion of LTIP units into OP Units	0	0	0	0	0	(18,414)	0	0	18,414
Changes in additional paid-in capital	(3,832)	0	0	0	0	(3,832)	0	0	0
Deconsolidation of MDA Apartments, Crescent Perimeter and Vickers Village	(22,920)	0	0	0	0	0	0	0	(22,920)
Adjustment for noncontrolling interests ownership in Operating Partnership	0	0	0	0	0	5,302	0	0	(5,302)
Net (loss) income	(7,028)	0	0	0	0	0	0	(15,645)	8,617
Balance at Dec. 31, 2017	286,178	$ 242	$ 1	$ 0	$ 68,705	318,170	(134,817)	(29,469)	63,346
Balance (in shares) at Dec. 31, 2017		24,218,359	76,603	0	2,850,602
Issuance of Class A common stock, net	25	$ 0	$ 0	$ 0	$ 0	25	0	0	0
Issuance of Class A common stock, net (in shares)		2,831	0	0	0
Issuance of Class A common stock due to Series B warrants exercise
Issuance of Class A common stock due to Series B warrants exercise (in shares)		100
Repurchase of Class A common stock	(9,018)	$ (11)	$ 0	$ 0	$ 0	(9,007)	0	0	0
Repurchase of Class A common stock (in shares)		(1,055,057)	0	0	0
Issuance of Long-Term Incentive Plan ("LTIP") units for director compensation	220	$ 0	$ 0	$ 0	$ 0	0	0	0	220
Issuance of Long-Term Incentive Plan ("LTIP") units for director compensation (in shares)		0	0	0	0
Issuance of LTIP units for compensation	5,128	$ 0	$ 0	$ 0	$ 0	0	0	0	5,128
Issuance of LTIP units for compensation (in shares)		0	0	0	0
Issuance of LTIP units for compensation to former Manager	993	$ 0	$ 0	$ 0	$ 0	0	0	0	993
Issuance of LTIP units for expense reimbursements	1,066								1,066
Issuance of Series B warrants	1,699	0	0	0	0	1,699	0	0	0
Contributions from noncontrolling interests, net	13,551	0	0	0	0	0	0	0	13,551
Series A Preferred Stock distributions declared	(11,800)	0	0	0	0	0	(11,800)	0	0
Series A Preferred Stock accretion	(744)	0	0	0	0	0	(744)	0	0
Series B Preferred Stock distributions declared	(14,332)	0	0	0	0	0	(14,332)	0	0
Series B Preferred Stock accretion	(4,937)	0	0	0	0	0	(4,937)	0	0
Series C Preferred Stock distributions declared	(4,428)	0	0	0	0	0	(4,428)	0	0
Series C Preferred Stock accretion	(289)	0	0	0	0	0	(289)	0	0
Series D Preferred Stock distributions declared	(5,077)	0	0	0	0	0	(5,077)	0	0
Distributions to operating partnership noncontrolling interests	(4,139)	0	0	0	0	0	0	0	(4,139)
Distributions to noncontrolling interests	(1,786)	0	0	0	0	0	0	0	(1,786)
Cash redemption of Operating Partnership units	(6)					(3)			(3)
Redemption of Series B Preferred Stock and conversion into Class A common stock	1,565	$ 2	$ 0	$ 0	$ 0	1,563	0	0	0
Redemption of Series B Preferred Stock and conversion into Class A common stock (in shares)		155,978	0	0	0
Cash redemption of Series B Preferred Stock	13	$ 0	$ 0	$ 0	$ 0	13	0	0	0
Common stock distribution declared	(11,486)	0	0	0	0	0	(11,486)	0	0
Acquisition of noncontrolling interest	(12,178)	0	0	0	0	(10,334)	0	0	(1,844)
Adjustment for noncontrolling interest ownership in Operating Partnership	0	0	0	0	0	5,812	0	0	(5,812)
Net (loss) income	(15,275)	0	0	0	0	0	0	(1,152)	(14,123)
Balance at Dec. 31, 2018	$ 214,943	$ 233	$ 1	$ 0	$ 68,705	$ 307,938	$ (187,910)	$ (30,621)	$ 56,597
Balance (in shares) at Dec. 31, 2018		23,322,211	76,603	0	2,850,602