Earnings Per Unit ('EPU') - Schedule of Calculation of Numerator and Denominator in Earnings Per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Unit [Line Items]
Interest in net (loss)/income: Net (loss)/income from continuing operations	$ (3,035)	$ 545	$ (5,856)	$ (1,413)
Interest in net (loss)/income: Net (loss)/income from discontinued operations		(255)		(326)
Total interest in net (loss)/income	(3,035)	290	(5,856)	(1,739)
General Partner's [Member]
Earnings Per Unit [Line Items]
Interest in net (loss)/income: Net (loss)/income from continuing operations	(14)	(3)	(27)	(16)
Interest in net (loss)/income: Net (loss)/income from discontinued operations		(1)		(1)
Total interest in net (loss)/income	$ (14)	$ (4)	$ (27)	$ (17)
Weighted average units used to compute basic EPU
Weighted average units used to compute diluted EPU
Net (loss)/income per unit from continuing operations, basic
Net (loss)/income per unit from discontinued operations, basic
Net (loss)/income per common unit, basic
Net (loss)/income per unit from continuing operations, diluted
Net (loss)/income per unit from discontinued operations, diluted
Net (loss)/income per common unit, diluted
Common Unitholders' [Member]
Earnings Per Unit [Line Items]
Interest in net (loss)/income: Net (loss)/income from continuing operations	$ (3,061)	$ (738)	$ (5,917)	$ (3,533)
Interest in net (loss)/income: Net (loss)/income from discontinued operations		(232)		(296)
Total interest in net (loss)/income	$ (3,061)	$ (970)	$ (5,917)	$ (3,829)
Weighted average units used to compute basic EPU	13,055,000	12,964,000	13,009,000	12,920,000
Weighted average units used to compute diluted EPU	13,055,000	12,964,000	13,009,000	12,920,000
Net (loss)/income per unit from continuing operations, basic	$ (0.23)	$ (0.06)	$ (0.45)	$ (0.28)
Net (loss)/income per unit from discontinued operations, basic		(0.02)		(0.02)
Net (loss)/income per common unit, basic	(0.23)	(0.08)	(0.45)	(0.30)
Net (loss)/income per unit from continuing operations, diluted	(0.23)	(0.06)	(0.45)	(0.28)
Net (loss)/income per unit from discontinued operations, diluted		(0.02)		(0.02)
Net (loss)/income per common unit, diluted	$ (0.23)	$ (0.08)	$ (0.45)	$ (0.30)
Subordinated Unitholders' [Member]
Earnings Per Unit [Line Items]
Interest in net (loss)/income: Net (loss)/income from continuing operations	$ (269)	$ (70)	$ (521)	$ (338)
Interest in net (loss)/income: Net (loss)/income from discontinued operations		(23)		(28)
Total interest in net (loss)/income	$ (269)	$ (93)	$ (521)	$ (366)
Weighted average units used to compute basic EPU	1,146,000	1,236,000	1,146,000	1,236,000
Weighted average units used to compute diluted EPU	1,146,000	1,236,000	1,146,000	1,236,000
Net (loss)/income per unit from continuing operations, basic	$ (0.23)	$ (0.06)	$ (0.45)	$ (0.28)
Net (loss)/income per unit from discontinued operations, basic		(0.02)		(0.02)
Net (loss)/income per common unit, basic	(0.23)	(0.08)	(0.45)	(0.30)
Net (loss)/income per unit from continuing operations, diluted	(0.23)	(0.06)	(0.45)	(0.28)
Net (loss)/income per unit from discontinued operations, diluted		(0.02)		(0.02)
Net (loss)/income per common unit, diluted	$ (0.23)	$ (0.08)	$ (0.45)	$ (0.30)
Preferred Unitholders' [Member]
Earnings Per Unit [Line Items]
Interest in net (loss)/income: Net (loss)/income from continuing operations	$ 309	$ 1,357	$ 609	$ 2,473
Interest in net (loss)/income: Net (loss)/income from discontinued operations
Total interest in net (loss)/income	$ 309	$ 1,357	$ 609	$ 2,473
Weighted average units used to compute basic EPU	1,500,000	1,500,000	1,500,000	1,500,000
Weighted average units used to compute diluted EPU	1,500,000	1,500,000	1,500,000	1,500,000
Net (loss)/income per unit from continuing operations, basic	$ 0.21	$ 0.90	$ 0.41	$ 1.65
Net (loss)/income per unit from discontinued operations, basic
Net (loss)/income per common unit, basic	0.21	0.90	0.41	1.65
Net (loss)/income per unit from continuing operations, diluted	0.21	0.90	0.41	1.65
Net (loss)/income per unit from discontinued operations, diluted
Net (loss)/income per common unit, diluted	$ 0.21	$ 0.90	$ 0.41	$ 1.65