Consolidated Statements of Partners' Capital - USD ($) $ in Thousands	Total	AOCI Attributable to Parent [Member]	General Partner [Member]
Partners' capital at Dec. 31, 2014	$ 41,048	$ (186)	$ 41,234
Proceeds from Sale of Interest in Partnership Unit
Allocation of net loss:
Allocation of net loss	(2,192)		(2,192)
Accumulated other comprehensive income (loss)
Change in pension and severance	(135)	(135)
Partners' capital at Dec. 31, 2015	38,721	(321)	39,042
Proceeds from Sale of Interest in Partnership Unit	224		224
Allocation of net loss:
Allocation of net loss	(1,996)		(1,996)
Accumulated other comprehensive income (loss)
Change in pension and severance	93	93
Partners' capital at Dec. 31, 2016	$ 37,042	$ (228)	$ 37,270