SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Basic and Diluted Income (Loss) per Unit) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 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	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net and comprehensive income attributable to unitholders	$ (2,502)	$ (579)	$ 2,205	$ 3,311	$ (1,778)	$ 2,644	$ 199	$ 5,718	$ 2,435	$ 6,821	$ 17,891
Less: Net and comprehensive income attributable to unvested restricted unitholders									(152)	(125)	(133)
Less: Dividends paid to Funds preferred shareholders									(46)	(31)	(31)
Net and comprehensive income attributable to unitholders for earnings per unit calculation									$ 2,237	$ 6,665	$ 17,727
Basic and diluted weighted average units outstanding (in shares)									4,321	4,317	4,323
Basic and diluted net earnings per unit (in dollars per share)	$ (0.59)	$ (0.15)	$ 0.50	$ 0.75	$ (0.41)	$ 0.60	$ 0.04	$ 1.31	$ 0.52	$ 1.54	$ 4.10