TAXABLE INCOME AND TAX BASIS (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
TAXABLE INCOME AND TAX BASIS
Excess amount of cumulative statement basis over cumulative taxable basis	$ 7,000,000								$ 7,000,000
Excess amount of statement income from joint venture investments over taxable income									1,500,000
Reconciliation of GAAP net income to taxable income
Financial statement ("book") net income	$ 1,192,704	$ 1,073,746	$ 1,096,457	$ 409,658	$ 591,256	$ 181,487	$ 281,721	$ (29,614)	3,772,565	$ 1,024,850	$ 5,655,385
Book/Tax differences from depreciation and amortization									(2,513,000)	(2,884,000)	(300,000)
Book/Tax differences on tax free exchanges									501,000	(827,000)	(4,670,000)
Book/Tax differences from Investment Properties									(74,000)	307,000	400,000
Increase (Decrease) in prepaid rent and allowances									413,000	269,000	175,000
Other									6,000	2,000	50,000
Taxable income (loss)									$ 2,106,000	$ (2,108,000)	$ 1,310,000