Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
REVENUES:
Total revenues	$ 54,923	$ 54,688	$ 109,723	$ 106,232
COSTS AND EXPENSES:
Cost of operations (exclusive of depreciation, depletion and amortization shown separately below)	49,592	44,951	99,245	88,188
Freight and handling costs	1,472		2,376	594
Depreciation, depletion and amortization	5,677	5,470	11,104	10,977
Selling, general and administrative (exclusive of depreciation, depletion and amortization shown separately above)	2,800	2,717	5,496	5,757
(Gain)/Loss on sale/disposal of assets-net	(3,496)	80	(6,434)	45
Total costs and expenses	56,045	53,218	111,787	105,561
(LOSS)/INCOME FROM OPERATIONS	(1,122)	1,470	(2,064)	671
INTEREST AND OTHER EXPENSE/(INCOME):
Interest expense	1,913	965	3,798	2,120
Interest income and other			(6)
Equity in net loss/(income) of unconsolidated affiliates		(40)		(36)
Total interest and other expense	1,913	925	3,792	2,084
NET( LOSS)/INCOME BEFORE INCOME TAXES FROM CONTINUING OPERATIONS	(3,035)	545	(5,856)	(1,413)
INCOME TAXES
NET (LOSS)/INCOME FROM CONTINUING OPERATIONS	(3,035)	545	(5,856)	(1,413)
DISCONTINUED OPERATIONS (NOTE 3)
Loss from discontinued operations		(255)		(326)
NET (LOSS)/INCOME	(3,035)	290	(5,856)	(1,739)
Other comprehensive (loss)/income:
Fair market value adjustment for available-for-sale investment	198	554	4,380	2,021
Reclass for disposition	(3,977)		(6,621)
Total other comprehensive (loss)/income	(3,779)	554	(2,241)	2,021
COMPREHENSIVE (LOSS)/INCOME	(6,814)	844	(8,097)	282
General Partner's [Member]
INTEREST AND OTHER EXPENSE/(INCOME):
NET (LOSS)/INCOME FROM CONTINUING OPERATIONS	(14)	(3)	(27)	(16)
DISCONTINUED OPERATIONS (NOTE 3)
Loss from discontinued operations		(1)		(1)
NET (LOSS)/INCOME	$ (14)	$ (4)	$ (27)	$ (17)
Net (loss)/income per limited partner unit, basic:
Net (loss) per unit from continuing operations
Net (loss) per unit from discontinued operations
Net (loss)/income per limited partner unit, diluted:
Net (loss) per unit from continuing operations
Net (loss) per unit from discontinued operations
Weighted average number of limited partner units outstanding, basic
Weighted average number of limited partner units outstanding, diluted
Common Unitholders' [Member]
INTEREST AND OTHER EXPENSE/(INCOME):
NET (LOSS)/INCOME FROM CONTINUING OPERATIONS	$ (3,061)	$ (738)	$ (5,917)	$ (3,533)
DISCONTINUED OPERATIONS (NOTE 3)
Loss from discontinued operations		(232)		(296)
NET (LOSS)/INCOME	$ (3,061)	$ (970)	$ (5,917)	$ (3,829)
Net (loss)/income per limited partner unit, basic:
Net (loss) per unit from continuing operations	$ (0.23)	$ (0.06)	$ (0.45)	$ (0.28)
Net (loss) per unit from discontinued operations		(0.02)		(0.02)
Net (loss) per common unit, basic	(0.23)	(0.08)	(0.45)	(0.30)
Net (loss)/income per limited partner unit, diluted:
Net (loss) per unit from continuing operations	(0.23)	(0.06)	(0.45)	(0.28)
Net (loss) per unit from discontinued operations		(0.02)		(0.02)
Net (loss) per common unit, diluted	$ (0.23)	$ (0.08)	$ (0.45)	$ (0.30)
Weighted average number of limited partner units outstanding, basic	13,055,000	12,964,000	13,009,000	12,920,000
Weighted average number of limited partner units outstanding, diluted	13,055,000	12,964,000	13,009,000	12,920,000
Subordinated Unitholders' [Member]
INTEREST AND OTHER EXPENSE/(INCOME):
NET (LOSS)/INCOME FROM CONTINUING OPERATIONS	$ (269)	$ (70)	$ (521)	$ (338)
DISCONTINUED OPERATIONS (NOTE 3)
Loss from discontinued operations		(23)		(28)
NET (LOSS)/INCOME	$ (269)	$ (93)	$ (521)	$ (366)
Net (loss)/income per limited partner unit, basic:
Net (loss) per unit from continuing operations	$ (0.23)	$ (0.06)	$ (0.45)	$ (0.28)
Net (loss) per unit from discontinued operations		(0.02)		(0.02)
Net (loss) per common unit, basic	(0.23)	(0.08)	(0.45)	(0.30)
Net (loss)/income per limited partner unit, diluted:
Net (loss) per unit from continuing operations	(0.23)	(0.06)	(0.45)	(0.28)
Net (loss) per unit from discontinued operations		(0.02)		(0.02)
Net (loss) per common unit, diluted	$ (0.23)	$ (0.08)	$ (0.45)	$ (0.30)
Weighted average number of limited partner units outstanding, basic	1,146,000	1,236,000	1,146,000	1,236,000
Weighted average number of limited partner units outstanding, diluted	1,146,000	1,236,000	1,146,000	1,236,000
Preferred Unitholders' [Member]
INTEREST AND OTHER EXPENSE/(INCOME):
NET (LOSS)/INCOME FROM CONTINUING OPERATIONS	$ 309	$ 1,357	$ 609	$ 2,473
DISCONTINUED OPERATIONS (NOTE 3)
Loss from discontinued operations
NET (LOSS)/INCOME	$ 309	$ 1,357	$ 609	$ 2,473
Net (loss)/income per limited partner unit, basic:
Net (loss) per unit from continuing operations	$ 0.21	$ 0.90	$ 0.41	$ 1.65
Net (loss) per unit from discontinued operations
Net (loss) per common unit, basic	0.21	0.90	0.41	1.65
Net (loss)/income per limited partner unit, diluted:
Net (loss) per unit from continuing operations	0.21	0.90	0.41	1.65
Net (loss) per unit from discontinued operations
Net (loss) per common unit, diluted	$ 0.21	$ 0.90	$ 0.41	$ 1.65
Weighted average number of limited partner units outstanding, basic	1,500,000	1,500,000	1,500,000	1,500,000
Weighted average number of limited partner units outstanding, diluted	1,500,000	1,500,000	1,500,000	1,500,000
Coal Sales [Member]
REVENUES:
Total revenues	$ 54,245	$ 54,299	$ 108,517	$ 105,554
Freight and Handling Revenues [Member]
REVENUES:
Total revenues
Other Revenues [Member]
REVENUES:
Total revenues	$ 678	$ 389	$ 1,206	$ 678