RESTATEMENT OF PREVIOUSLY ISSUED CONSOLIDATED FINANCIAL STATEMENTS - Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended											6 Months Ended				9 Months Ended				12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018		Jun. 30, 2019		Jun. 30, 2018		Sep. 30, 2019		Sep. 30, 2018		Dec. 31, 2019		Dec. 31, 2018		Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income		$ 4,071	$ (4,273)	$ (4,213)		$ 8,099		$ (3,077)	$ (4,651)	$ 25,254		$ (8,486)		$ 20,603		$ (4,415)		$ 17,526		$ 1,693		$ 25,625	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation				1,547						1,074		2,975		2,150		4,348		3,519		5,916		4,927	[1]
Amortization of deferred financing fees				73						59		157		114		228		184		311		192	[1]
Amortization of restricted stock				365						298		738		658		1,110		673		1,492		995	[1]
Equity in loss of unconsolidated joint ventures	$ 2,150	2,390	2,218	2,068		1,148		1,627	2,566	(253)		4,286		2,313		6,676		3,940		8,826		5,088	[1]
Equity in earnings on sale of real estate of unconsolidated ventures										(26,402)				(26,402)				(26,402)						$ (9,932)	$ (37,869)	[1]
Gain on sale of real estate										(437)				(437)		(9,938)		(861)		(10,618)		(861)	[1]
Gain on insurance recovery																						0
Loss on extinguishment of debt	0	1,387	0	0		0		0	0	0				0		1,387		0		1,387		0	[1]
Increases and decreases from changes in other assets and liabilities:
Decrease (increase) in deposits and escrows				690						5,553		305		4,992		422		4,252		1,975		5,176	[1]
Increase in accounts payable and accrued liabilities				1,704						59		4,772		367		5,834		321		3,766		1,002	[1]
Decrease (increase) in other assets				(1,918)						(100)		(2,709)		(212)		(2,588)		(431)		(3,610)		(303)	[1]
Net cash provided by operating activities				316						20,285		2,038		19,326		3,064		17,897		8,648		27,002	[1]
Cash flows from investing activities:
Collections from real estate loans				150						150		300		300		450		450		600		600	[1]
Additions to real estate properties				0						0		0		0		0		0				0
Net costs capitalized to real estate owned				(390)						(75)		(861)		(165)		(1,169)		(278)		(1,580)		(530)	[1]
Investment in joint venture				0								0				0						0
Purchase of partner interests																		(4,667)		(1,316)		(7,923)	[1]
Purchase of non-controlling interest										(250)				(250)				(250)		0		(251)	[1]
Consolidation of investment in limited partnership				0						0		0		0		0		0				0
Proceeds from the sale of real estate owned										437				437		32,801		861		33,588		861	[1]
Distributions from unconsolidated joint ventures				4,101						27,948		8,523		31,331		12,034		34,355		20,713		52,363	[1]
Contributions to unconsolidated joint ventures				(12,287)						(32,810)		(24,348)		(47,010)		(29,069)		(47,010)				(59,930)	[1]	(29,069)
Net cash (used in) provided by investing activities				(8,426)						(4,600)		(16,386)		(15,357)		15,047		(16,539)		22,936		(14,810)	[1]
Cash flows from financing activities:
Proceeds from mortgages payable				0						0		0		0		0		0				0
Mortgage payoffs				0						0		0		0		(20,635)		0		(20,635)		0	[1]
Mortgage principal payments				(775)						(533)		(1,528)		(1,051)		(2,189)		(1,666)		(2,912)		(2,351)	[1]
Increase in deferred financing costs				0						0		(83)		0		(83)		0		(84)		0	[1]
Dividends paid				(3,181)						(2,856)		(6,361)		(5,788)		(9,871)		(8,939)		(13,468)		(12,088)	[1]
Contributions from non-controlling interests				0						0		0		0		0		0				0
Distributions to non-controlling interests				(46)						(2)		(86)		(13)		(1,220)		(75)		(1,257)		(107)	[1]
Proceeds from the sale of common stock										1,401				11,926		774		20,411		7,517		20,412	[1]
Repurchase of shares of common stock												(46)				(46)		(41)		(46)		(162)	[1]
Net cash provided by (used in) financing activities				(4,002)						(1,990)		896		5,074		(29,670)		9,690		(30,885)		5,704	[1]
Net increase in cash, cash equivalents and restricted cash				(12,112)						13,695		(13,452)		9,043		(11,559)		11,048		699		17,896	[1]
Cash, cash equivalents and restricted cash at beginning of year	20,160	18,267	19,607	31,719	[1]	24,871		22,866	27,518	13,823	[1]	31,719	[1]	13,823	[1]	31,719	[1]	13,823	[1]	31,719	[1]	13,823	[1]
Cash, cash equivalents and restricted cash at end of year	32,418	20,160	18,267	19,607		31,719	[1]	24,871	22,866	27,518		18,267		22,866		20,160		24,871		32,418		31,719	[1]	24,871
Supplemental disclosures of cash flow information:
Cash paid during the year for interest expense				1,863						1,352		3,789		2,706		5,616		4,310		7,511		6,185	[1]
Cash paid during the year for income and excise taxes				10						14		44		114		44		216		324		255	[1]
Distributions from equity in earnings of unconsolidated joint ventures																				7,442		23,030	[1]
As Previously Reported
Cash flows from operating activities:
Net income		3,345	(5,250)	(5,083)		15,310		(4,138)	(5,971)	49,908		(10,333)		43,937		(6,988)		39,799				55,109
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation				9,617						9,240		19,964		19,440		29,914		29,856				40,048
Amortization of deferred financing fees				379						378		937		766		1,345		1,068				1,246
Amortization of restricted stock				365						298		738		658		1,110		673				996
Equity in loss of unconsolidated joint ventures		259	161	223		125		174	127	63		384		190		643		364				488
Equity in earnings on sale of real estate of unconsolidated ventures										0				0				0							0
Gain on sale of real estate										(51,981)				(51,981)		(9,938)		(52,405)				(71,919)
Gain on insurance recovery																						(6,083)
Loss on extinguishment of debt		1,766				207				593				593		1,766		593				800
Increases and decreases from changes in other assets and liabilities:
Decrease (increase) in deposits and escrows				7,062						3,536		4,861		3,926		2,048		2,732				5,922
Increase in accounts payable and accrued liabilities				(2,314)						(3,499)		1,604		2,007		5,107		6,823				3,861
Decrease (increase) in other assets				(1,757)						6,300		(2,358)		5,138		(1,967)		5,219				7,431
Net cash provided by operating activities				8,492						11,609		15,280		21,447		22,523		30,223				37,899
Cash flows from investing activities:
Collections from real estate loans				150						150		300		300		450		450				600
Additions to real estate properties				(6,903)						(88,991)		(56,840)		(140,433)		(78,196)		(151,030)				(199,786)
Net costs capitalized to real estate owned				(2,177)						(3,637)		(4,755)		(10,019)		(7,313)		(15,159)				(18,252)
Investment in joint venture				(11,231)								(11,231)		(12,370)		(11,231)		(12,370)				(12,370)
Purchase of partner interests																		0				0
Purchase of non-controlling interest										(250)				(250)				(5,172)				(8,616)
Consolidation of investment in limited partnership				(1,458)						(1,279)		(1,458)		(1,279)		(1,458)		(1,279)				(1,279)
Proceeds from the sale of real estate owned										146,901				146,901		32,807		147,325				239,212
Distributions from unconsolidated joint ventures				484						207		898		381		1,096		673				868
Contributions to unconsolidated joint ventures				0						(12,370)		0		0		0		0				0
Net cash (used in) provided by investing activities				(18,219)						43,289		(70,170)		(14,211)		(60,929)		(34,004)				2,935
Cash flows from financing activities:
Proceeds from mortgages payable				13,880						54,475		82,325		82,524		128,193		92,502				129,542
Mortgage payoffs				(9,200)						(75,437)		(38,200)		(75,436)		(86,214)		(75,436)				(132,016)
Mortgage principal payments				(1,304)						(1,197)		(2,721)		(2,424)		(4,051)		(3,802)				(5,169)
Increase in deferred financing costs				(120)						(437)		(1,098)		(943)		(1,742)		(940)				(1,182)
Dividends paid				(3,181)						(2,856)		(6,361)		(5,788)		(9,871)		(8,939)				(12,088)
Contributions from non-controlling interests				264						18,088		3,291		28,018		4,528		28,018				29,453
Distributions to non-controlling interests				(2,345)						(32,020)		(4,610)		(34,183)		(8,118)		(35,707)				(50,777)
Proceeds from the sale of common stock										1,401				11,926		774		20,411				20,411
Repurchase of shares of common stock												(46)				(46)		(41)				(161)
Net cash provided by (used in) financing activities				(2,006)						(37,983)		41,580		3,694		27,053		16,066				(21,987)
Net increase in cash, cash equivalents and restricted cash				(11,733)						16,915		(13,310)		10,930		(11,353)		12,285				18,847
Cash, cash equivalents and restricted cash at beginning of year	29,255	27,298	28,875	40,608		34,046		32,691	38,676	21,761		40,608		21,761		40,608		21,761		40,608		21,761
Cash, cash equivalents and restricted cash at end of year		29,255	27,298	28,875		40,608		34,046	32,691	38,676		27,298		32,691		29,255		34,046				40,608		34,046
Supplemental disclosures of cash flow information:
Cash paid during the year for interest expense				8,769						8,254		18,218		15,859		26,991		25,284				34,521
Cash paid during the year for income and excise taxes				10						14		44		114		44		216				255
Distributions from equity in earnings of unconsolidated joint ventures																						0
Restatement Impact
Cash flows from operating activities:
Net income		726	977	870		(7,211)		1,061	1,320	(24,654)		1,847		(23,334)		2,573		(22,273)				(29,484)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation				(8,070)						(8,166)		(16,989)		(17,290)		(25,566)		(26,337)				(35,121)
Amortization of deferred financing fees				(306)						(319)		(780)		(652)		(1,117)		(884)				(1,054)
Amortization of restricted stock				0						0		0		0		0		0				(1)
Equity in loss of unconsolidated joint ventures		2,131	2,057	1,845		1,023		1,453	2,439	(316)		3,902		2,123		6,033		3,576				4,600
Equity in earnings on sale of real estate of unconsolidated ventures										(26,402)				(26,402)				(26,402)							$ (37,869)
Gain on sale of real estate										51,544				51,544		0		51,544				71,058
Gain on insurance recovery																						6,083
Loss on extinguishment of debt		(379)				(207)				(593)				(593)		(379)		(593)				(800)
Increases and decreases from changes in other assets and liabilities:
Decrease (increase) in deposits and escrows				(6,372)						2,017		(4,556)		1,066		(1,626)		1,520				(746)
Increase in accounts payable and accrued liabilities				4,018						3,558		3,168		(1,640)		727		(6,502)				(2,859)
Decrease (increase) in other assets				(161)						(6,400)		(351)		(5,350)		(621)		(5,650)				(7,734)
Net cash provided by operating activities				(8,176)						8,676		(13,242)		(2,121)		(19,459)		(12,326)				(10,897)
Cash flows from investing activities:
Collections from real estate loans				0						0		0		0		0		0				0
Additions to real estate properties				6,903						88,991		56,840		140,433		78,196		151,030				199,786
Net costs capitalized to real estate owned				1,787						3,562		3,894		9,854		6,144		14,881				17,722
Investment in joint venture				11,231								11,231		12,370		11,231		12,370				12,370
Purchase of partner interests																		(4,667)				(7,923)
Purchase of non-controlling interest										0				0				4,922				8,365
Consolidation of investment in limited partnership				1,458						1,279		1,458		1,279		1,458		1,279				1,279
Proceeds from the sale of real estate owned										(146,464)				(146,464)		(6)		(146,464)				(238,351)
Distributions from unconsolidated joint ventures				3,617						27,741		7,625		30,950		10,938		33,682				51,495
Contributions to unconsolidated joint ventures				(12,287)						(20,440)		(24,348)		(47,010)		(29,069)		(47,010)				(59,930)
Net cash (used in) provided by investing activities				9,793						(47,889)		53,784		(1,146)		75,976		17,465				(17,745)
Cash flows from financing activities:
Proceeds from mortgages payable				(13,880)						(54,475)		(82,325)		(82,524)		(128,193)		(92,502)				(129,542)
Mortgage payoffs				9,200						75,437		38,200		75,436		65,579		75,436				132,016
Mortgage principal payments				529						664		1,193		1,373		1,862		2,136				2,818
Increase in deferred financing costs				120						437		1,015		943		1,659		940				1,182
Dividends paid				0						0		0		0		0		0				0
Contributions from non-controlling interests				(264)						(18,088)		(3,291)		(28,018)		(4,528)		(28,018)				(29,453)
Distributions to non-controlling interests				2,299						32,018		4,524		34,170		6,898		35,632				50,670
Proceeds from the sale of common stock										0				0		0		0				1
Repurchase of shares of common stock												0				0		0				(1)
Net cash provided by (used in) financing activities				(1,996)						35,993		(40,684)		1,380		(56,723)		(6,376)				27,691
Net increase in cash, cash equivalents and restricted cash				(379)						(3,220)		(142)		(1,887)		(206)		(1,237)				(951)
Cash, cash equivalents and restricted cash at beginning of year	$ (9,095)	(9,031)	(9,268)	(8,889)		(9,175)		(9,825)	(11,158)	(7,938)		(8,889)		(7,938)		(8,889)		(7,938)		$ (8,889)		(7,938)
Cash, cash equivalents and restricted cash at end of year		$ (9,095)	$ (9,031)	(9,268)		$ (8,889)		$ (9,175)	$ (9,825)	(11,158)		(9,031)		(9,825)		(9,095)		(9,175)				(8,889)		$ (9,175)
Supplemental disclosures of cash flow information:
Cash paid during the year for interest expense				(6,906)						(6,902)		(14,429)		(13,153)		(21,375)		(20,974)				(28,336)
Cash paid during the year for income and excise taxes				$ 0						$ 0		$ 0		$ 0		$ 0		$ 0				0
Distributions from equity in earnings of unconsolidated joint ventures																						$ 23,030

[1] * Amounts restated See footnotes 2 and 16 for more information.