Unaudited Condensed Consolidated Statements of Owners' Equity (Unaudited) - USD ($) $ in Thousands	Common Units [Member]	Preferred Units [Member]	Accumulated Other Comprehensive Gain (Loss) [Member]	Noncontrolling Interests [Member]	General Partner [Member]	Total
Owners' equity, beginning at Dec. 31, 2018	$ 34,677	$ 44,291	$ (2,414)	$ 3,609	$ (25,876)	$ 54,287
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	567	1,033		(219)		1,381
Foreign currency translation adjustment			(72)			(72)
Distributions	(2,510)	(1,033)				(3,543)
Equity-based compensation	269					269
Taxes paid related to net share settlement of equity-based compensation	(158)					(158)
Owners' equity, ending at Mar. 31, 2019	32,845	44,291	(2,486)	3,390	(25,876)	52,164
Owners' equity, beginning at Dec. 31, 2019	37,334	44,291	(2,577)	5,019	(25,876)	58,191
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,822)	1,033		(88)		(877)
Foreign currency translation adjustment			348			348
Distributions	(2,534)	(1,033)		(26)		(3,593)
Equity-based compensation	264					264
Taxes paid related to net share settlement of equity-based compensation	(138)					(138)
Owners' equity, ending at Mar. 31, 2020	$ 33,104	$ 44,291	$ (2,229)	$ 4,905	$ (25,876)	$ 54,195