Condensed Consolidated Statements of Partners' Capital (Unaudited) - USD ($) $ in Thousands	Total	AOCI Attributable to Parent [Member]	General Partner [Member]	Limited Partner [Member]
Partners' capital at Dec. 31, 2015	$ 38,721	$ (321)	$ 39,042
Proceeds from sale of general partner interest	224		224
Partner's capital issued for cash
Allocation of net income (loss):
Allocation of net loss	(1,143)		(1,143)
Accumulated other comprehensive income
Change in pension and severance	5	5
Partners' capital at Sep. 30, 2016	37,807	(316)	38,123
Partners' capital at Jun. 30, 2016	37,823	(317)	38,140
Proceeds from sale of general partner interest
Partner's capital issued for cash
Allocation of net income (loss):
Allocation of net loss	(17)		(17)
Accumulated other comprehensive income
Change in pension and severance	1	1
Partners' capital at Sep. 30, 2016	37,807	(316)	38,123
Partners' capital at Dec. 31, 2016	37,042	(228)	37,270
Proceeds from sale of general partner interest
Partner's capital issued for cash	19,856		201	19,655
Allocation of net income (loss):
Allocation of net loss	(807)		(807)
Accumulated other comprehensive income
Change in pension and severance
Partners' capital at Sep. 30, 2017	56,091	(228)	56,319
Partners' capital at Jun. 30, 2017	55,930	(228)	56,158
Proceeds from sale of general partner interest
Partner's capital issued for cash
Allocation of net income (loss):
Allocation of net loss	161		161
Accumulated other comprehensive income
Change in pension and severance
Partners' capital at Sep. 30, 2017	$ 56,091	$ (228)	$ 56,319