Condensed Consolidated Statements of Changes in Partners’ Capital - USD ($) $ in Thousands	Common units	Total
Partner's Capital (Deficit) at Dec. 31, 2016	$ 16,744	$ 16,744
Partner's Capital (Deficit) (in shares) at Dec. 31, 2016	13,447,749
Unit-based compensation programs	$ 3,373	3,373
Unit-based compensation programs (in shares)	217,481
Issuance of common units, net of offering costs	$ 11,228	11,228
Issuance of common units, net of offering costs (in shares)	906,613
Cash distributions to common unit holders	$ (25,192)	(25,192)
Common units issued as Class B Preferred distributions	$ 5,250	5,250
Common units issued as Class B Preferred distributions (in shares)	393,291
Distributions - Class B preferred units	$ (37,671)	(37,671)
Net loss	(3,040)	(3,040)
Partner's Capital (Deficit) at Dec. 31, 2017	$ (29,308)	(29,308)
Partner's Capital (Deficit) (in shares) at Dec. 31, 2017	14,965,134
Unit-based compensation programs	$ 2,785	2,785
Unit-based compensation programs (in shares)	604,228
Issuance of common units, net of offering costs	$ 4,572	4,572
Issuance of common units, net of offering costs (in shares)	431,192
Cash distributions to common unit holders	$ (13,614)	(13,614)
Distributions - Class B preferred units	(20,349)	(20,349)
Net loss	(353)	(353)
Partner's Capital (Deficit) at Jun. 30, 2018	$ (56,267)	$ (56,267)
Partner's Capital (Deficit) (in shares) at Jun. 30, 2018	16,000,554