QUARTERLY FINANCIAL DATA (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
QUARTERLY FINANCIAL DATA (Unaudited)
Revenues	$ 28,387	$ 26,861	$ 24,883	$ 25,640	$ 25,889	$ 24,287	$ 26,019	$ 22,326	$ 105,771	$ 98,521	$ 81,098
Total expenses	32,504	30,333	28,473	28,027	28,887	27,652	27,011	24,108	119,337	107,658	91,379
Total revenues less total expenses	(4,117)	(3,472)	(3,590)	(2,387)	(2,998)	(3,365)	(992)	(1,782)	(13,566)	(9,137)	(10,281)
Equity in loss of unconsolidated joint ventures	(77)	(307)	0	0					(384)	0	0
Gain on sale of real estate	16,763	0	0	35,838	11,379	10,263	24,226	609	52,601	46,477	15,005
Gain on sale of partnership interest					0	386	0	0	0	386	0
Loss on extinguishment of debt	(664)	0	0	(799)	(1,879)	0	(2,668)	0	(1,463)	(4,547)	0
Income from continuing operations	11,905	(3,779)	(3,590)	32,652	6,502	7,284	20,566	(1,173)	37,188	33,179	4,724
Provision for taxes	61	41	1,108	350	700	0	0	0	1,560	700	0
Income from continuing operations, net of taxes					5,802	7,284	20,566	(1,173)	35,628	32,479	4,724
Income (loss) from discontinued operations					0	0	14,279	(1,600)	0	12,679	(6,329)
Net income (loss)	11,844	(3,820)	(4,698)	32,302	5,802	7,284	34,845	(2,773)	35,628	45,158	(1,605)
(Income) attributable to non-controlling interests	(6,383)	418	469	(16,532)	(2,895)	(1,804)	(9,909)	739	(22,028)	(13,869)	(783)
Net income (loss) attributable to common stockholders	$ 5,461	$ (3,402)	$ (4,229)	$ 15,770	$ 2,907	$ 5,480	$ 24,936	$ (2,034)	$ 13,600	$ 31,289	$ (2,388)
Basic and per share amounts attributable to common stockholders
Continuing operations (in dollars per share)					$ 0.21	$ 0.39	$ 0.70	$ (0.10)		$ 1.21
Discontinued operations (in dollars per share)					0.00	0.00	1.06	(0.04)		1.02
Basic and diluted earnings (loss) per share (in dollars per share)	$ 0.39	$ (0.24)	$ (0.30)	$ 1.13	$ 0.21	$ 0.39	$ 1.76	$ (0.14)	$ 0.97	$ 2.23	$ (0.17)