Rhino Resource Partners 10-Q 9 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 02, 2019
Entity Registrant Name	Rhino Resource Partners LP
Entity Central Index Key	0001490630
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business Flag	true
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Shell Company	false
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2019
Common Units [Member]
Entity Common Stock, Shares Outstanding		13,098,353
Subordinated Units [Member]
Entity Common Stock, Shares Outstanding		1,143,171

Condensed Consolidated Statemen

Condensed Consolidated Statements of Financial Position (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 1,592	$ 6,172
Accounts receivable, net of allowance for doubtful accounts ($-0- and $0.7 million as of June 30, 2019 and December 31, 2018, respectively.)	22,595	15,126
Receivable-other	7,000
Inventories	11,747	6,573
Advance royalties, current portion	1,118	548
Investment in equity securities		1,872
Prepaid expenses and other	3,698	2,766
Total current assets	47,750	33,057
PROPERTY, PLANT AND EQUIPMENT:
At cost, including coal properties, mine development and construction costs	452,998	450,888
Less accumulated depreciation, depletion and amortization	(287,855)	(277,029)
Net property, plant and equipment	165,143	173,859
Operating lease right-of-use assets (net)	12,759
Advance royalties, net of current portion	7,973	8,026
Deposits - Workers' Compensation and Surety Programs	7,943	8,266
Other non-current assets	25,123	25,410
TOTAL	266,691	248,618
CURRENT LIABILITIES:
Accounts payable	26,439	14,185
Accrued expenses and other	11,994	10,107
Accrued preferred distributions	600	3,210
Current portion of operating lease liabilities	3,211
Current portion of long-term debt	5,036	2,174
Current portion of asset retirement obligations	465	465
Total current liabilities	47,745	30,141
NON-CURRENT LIABILITIES:
Long-term debt, net	20,705	22,458
Asset retirement obligations, net of current portion	18,646	18,084
Operating lease liabilities, net of current portion	9,181
Other non-current liabilities	41,746	41,500
Total non-current liabilities	90,278	82,042
Total liabilities	138,023	112,183
COMMITMENTS AND CONTINGENCIES (NOTE 13)
PARTNERS' CAPITAL:
Limited partners	107,770	115,505
General partner	8,760	8,792
Preferred partners	15,000	15,000
Investment in Royal common stock (NOTE 11)	(4,126)	(4,126)
Common unit warrants	1,264	1,264
Total partners' capital	128,668	136,435
TOTAL	$ 266,691	$ 248,618

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Financial Position (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 0	$ 700

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
REVENUES:
Total revenues	$ 65,588	$ 54,923	$ 124,326	$ 109,723
COSTS AND EXPENSES:
Cost of operations (exclusive of depreciation, depletion and amortization shown separately below)	59,756	49,592	114,403	99,245
Freight and handling costs	1,778	1,472	2,933	2,376
Depreciation, depletion and amortization	5,616	5,677	11,166	11,104
Selling, general and administrative (exclusive of depreciation, depletion and amortization shown separately above)	3,475	2,800	6,217	5,496
(Gain) on sale/disposal of assets, net	(6,884)	(3,496)	(6,662)	(6,434)
Total costs and expenses	63,741	56,045	128,057	111,787
INCOME/(LOSS) FROM OPERATIONS	1,847	(1,122)	(3,731)	(2,064)
INTEREST AND OTHER (EXPENSE)/INCOME:
Interest expense and other	(1,735)	(1,913)	(3,436)	(3,798)
Interest income and other				6
Total interest and other (expense)	(1,735)	(1,913)	(3,436)	(3,792)
INCOME/(LOSS) BEFORE INCOME TAXES	112	(3,035)	(7,167)	(5,856)
INCOME TAXES
NET INCOME/(LOSS)	112	(3,035)	(7,167)	(5,856)
Other comprehensive income:
Fair value adjustment for investment		198		4,380
Reclass for disposition		(3,977)		(6,621)
Total other comprehensive income		(3,779)		(2,241)
COMPREHENSIVE INCOME/(LOSS)	112	(6,814)	(7,167)	(8,097)
General Partner's [Member]
INTEREST AND OTHER (EXPENSE)/INCOME:
NET INCOME/(LOSS)	(1)	(14)	(32)	(27)
Common Unitholders' [Member]
INTEREST AND OTHER (EXPENSE)/INCOME:
NET INCOME/(LOSS)	$ (172)	$ (3,061)	$ (7,114)	$ (5,917)
Net (loss)/income per limited partner unit, basic:
Net (loss)/income per unit, basic	$ (0.01)	$ (0.23)	$ (0.54)	$ (0.45)
Net (loss)/income per limited partner unit, diluted:
Net (loss)/income per unit, diluted	$ (0.01)	$ (0.23)	$ (0.54)	$ (0.45)
Weighted average number of limited partner units outstanding, basic:
Weighted average number of limited partner units outstanding, basic	13,098,000	13,055,000	13,098,000	13,009,000
Weighted average number of limited partner units outstanding, diluted:
Weighted average number of limited partner units outstanding, diluted	13,098,000	13,055,000	13,098,000	13,009,000
Subordinated Unitholders' [Member]
INTEREST AND OTHER (EXPENSE)/INCOME:
NET INCOME/(LOSS)	$ (15)	$ (269)	$ (621)	$ (521)
Net (loss)/income per limited partner unit, basic:
Net (loss)/income per unit, basic	$ (0.01)	$ (0.23)	$ (0.54)	$ (0.45)
Net (loss)/income per limited partner unit, diluted:
Net (loss)/income per unit, diluted	$ (0.01)	$ (0.23)	$ (0.54)	$ (0.45)
Weighted average number of limited partner units outstanding, basic:
Weighted average number of limited partner units outstanding, basic	1,143,000	1,146,000	1,144,000	1,146,000
Weighted average number of limited partner units outstanding, diluted:
Weighted average number of limited partner units outstanding, diluted	1,143,000	1,146,000	1,144,000	1,146,000
Preferred Unitholders' [Member]
INTEREST AND OTHER (EXPENSE)/INCOME:
NET INCOME/(LOSS)	$ 300	$ 309	$ 600	$ 609
Net (loss)/income per limited partner unit, basic:
Net (loss)/income per unit, basic	$ 0.20	$ 0.21	$ 0.40	$ 0.41
Net (loss)/income per limited partner unit, diluted:
Net (loss)/income per unit, diluted	$ 0.20	$ 0.21	$ 0.40	$ 0.41
Weighted average number of limited partner units outstanding, basic:
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:
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	$ 65,092	$ 54,245	$ 122,955	$ 108,517
Other Revenues [Member]
REVENUES:
Total revenues	$ 496	$ 678	$ 1,371	$ 1,206

Consolidated Statements of Part

Consolidated Statements of Partners' Capital (Unaudited) - USD ($) $ in Thousands	Limited Partners Common Capital [Member]	Limited Partners Subordinated Capital [Member]	General Partner Capital [Member]	Preferred Partner Capital [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Other [Member]	Total
Balance at Dec. 31, 2017	$ 52,850	$ 77,383	$ 8,855	$ 15,000	$ 4,220	$ (2,862)	$ 155,446
Balance, shares at Dec. 31, 2017	12,994,000	1,146,000
Net (loss)/income	$ (2,856)	$ (252)	(13)	300			(2,821)
Preferred partner distribution earned				(300)			(300)
Reclass of disposition of Mammoth shares					(2,644)		(2,644)
Mark-to-market investment in Mammoth					4,182		4,182
Balance at Mar. 31, 2018	$ 49,994	$ 77,131	8,842	15,000	5,758	(2,862)	153,863
Balance, shares at Mar. 31, 2018	12,994,000	1,146,000
Balance at Dec. 31, 2017	$ 52,850	$ 77,383	8,855	15,000	4,220	(2,862)	155,446
Balance, shares at Dec. 31, 2017	12,994,000	1,146,000
Net (loss)/income							(5,856)
Reclass of disposition of Mammoth shares							(6,621)
Mark-to-market investment in Mammoth							4,380
Balance at Jun. 30, 2018	$ 47,163	$ 76,862	8,828	15,000	1,979	(2,862)	146,970
Balance, shares at Jun. 30, 2018	13,098,000	1,146,000
Balance at Mar. 31, 2018	$ 49,994	$ 77,131	8,842	15,000	5,758	(2,862)	153,863
Balance, shares at Mar. 31, 2018	12,994,000	1,146,000
Net (loss)/income	$ (3,061)	$ (269)	(14)	309			(3,035)
Preferred partner distribution earned				(309)			(309)
Reclass of disposition of Mammoth shares					(3,977)		(3,977)
Mark-to-market investment in Mammoth					198		198
Issuance of units	$ 230						230
Issuance of units, shares	104,000
Balance at Jun. 30, 2018	$ 47,163	$ 76,862	8,828	15,000	1,979	(2,862)	146,970
Balance, shares at Jun. 30, 2018	13,098,000	1,146,000
Balance at Dec. 31, 2018	$ 39,324	$ 76,181	8,792	15,000		(2,862)	136,435
Balance, shares at Dec. 31, 2018	13,098,000	1,144,000
Net (loss)/income	$ (6,941)	$ (606)	(32)	300			(7,279)
Preferred partner distribution earned				(300)			(300)
Balance at Mar. 31, 2019	$ 32,383	$ 75,575	8,760	15,000		(2,862)	128,856
Balance, shares at Mar. 31, 2019	13,098,000	1,144,000
Balance at Dec. 31, 2018	$ 39,324	$ 76,181	8,792	15,000		(2,862)	136,435
Balance, shares at Dec. 31, 2018	13,098,000	1,144,000
Net (loss)/income							(7,167)
Reclass of disposition of Mammoth shares
Mark-to-market investment in Mammoth
Balance at Jun. 30, 2019	$ 32,211	$ 75,560	8,759	15,000		(2,862)	128,668
Balance, shares at Jun. 30, 2019	13,098,000	1,144,000
Balance at Mar. 31, 2019	$ 32,383	$ 75,575	8,760	15,000		(2,862)	128,856
Balance, shares at Mar. 31, 2019	13,098,000	1,144,000
Net (loss)/income	$ (172)	$ (15)	(1)	300			112
Preferred partner distribution earned				(300)			(300)
Reclass of disposition of Mammoth shares
Mark-to-market investment in Mammoth
Balance at Jun. 30, 2019	$ 32,211	$ 75,560	$ 8,759	$ 15,000		$ (2,862)	$ 128,668
Balance, shares at Jun. 30, 2019	13,098,000	1,144,000

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss)	$ 112	$ (7,279)	$ (3,035)	$ (2,821)	$ (7,167)	$ (5,856)
Adjustments to reconcile net (loss) to net cash (used in)/provided by operating activities:
Depreciation, depletion and amortization					11,166	11,104
Accretion on asset retirement obligations					638	639	$ 1,269
Amortization of advance royalties					1,032	378
Amortization of debt issuance costs					1,073	815
Amortization of debt discount					211	211
Reduction of deferred revenue						(189)
Loss on retirement of advance royalties					225	108
(Gain)/loss on sale/disposal of assets-net					(6,229)	64
(Gain) on sale of Mammoth shares					(433)	(6,498)
Equity based compensation						230
Changes in assets and liabilities:
Accounts receivable					(7,469)	5,148
Inventories					(5,174)	(3,001)
Advance royalties					(1,774)	(845)
Prepaid expenses and other assets					(993)	(1,480)
Accounts payable					11,158	4,163
Accrued expenses and other liabilities					2,624	1,816
Asset retirement obligations					(76)	(158)
Net cash (used in)/provided by operating activities					(1,188)	6,649
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property, plant, and equipment					(4,260)	(16,000)
Proceeds from sales of property, plant, and equipment					1,635	4,014
Proceeds from sale of Mammoth shares					2,304	11,887
Net cash used in investing activities					(321)	(99)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments on long-term debt					(750)	(10,222)
Repayments on other debt					(522)	(134)
Repayments on finance leases					(2)
Proceeds from issuance of other debt					1,772	1,329
Deposit for workers' compensation and surety programs					323	(5,209)
Payments of debt issuance costs					(682)	(629)
Preferred distributions paid					(3,210)	(6,039)
Net cash (used in) financing activities					(3,071)	(20,904)
NET (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH					(4,580)	(14,354)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH-Beginning of period		$ 6,172		$ 21,120	6,172	21,120	21,120
CASH, CASH EQUIVALENTS AND RESTRICTED CASH-End of period	1,592		6,766		1,592	6,766	6,172
Summary Statement of Financial Position:
Cash and cash equivalents	1,592		3,114		1,592	3,114	$ 6,172
Restricted cash			3,652			3,652
Total cash, cash equivalents and restricted cash	$ 1,592		$ 6,766		$ 1,592	$ 6,766

Basis of Presentation and Organ

Basis of Presentation and Organization	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Organization	1. BASIS OF PRESENTATION AND ORGANIZATION Basis of Presentation and Principles of Consolidation. Cash, Cash Equivalents and Restricted Cash. Unaudited Interim Financial Information. Organization. Through a series of transactions completed in the first quarter of 2016, Royal Energy Resources, Inc. (“Royal”) acquired a majority ownership and control of the Partnership and 100% ownership of the Partnership’s general partner. The Partnership’s common units trade on the OTCQB Marketplace under the ticker symbol “RHNO.”

Summary of Significant Accounti

Summary of Significant Accounting Policies and General	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies and General	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND GENERAL Revenue Recognition. Revenue from Contracts with Customers (Topic 606) Freight and handling costs paid directly to third-party carriers and invoiced separately to coal customers are recorded as freight and handling costs and freight and handling revenues, respectively. Freight and handling costs billed to customers as part of the contractual per ton revenue of customer contracts is included in coal sales revenue. Other revenues generally consist of coal royalty revenues, coal handling and processing revenues, rebates and rental income. With respect to other revenues recognized in situations unrelated to the shipment of coal, the Partnership carefully reviews the facts and circumstances of each transaction and does not recognize revenue until the following criteria are met: persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the seller’s price to the buyer is fixed or determinable and collectability is reasonably assured. Debt Issuance Costs. Recently Issued Accounting Standards. Leases (Topic 842) In July 2017, the FASB issued ASU 2017-11, “Earnings Per Share (Topic 260): Distinguishing Liabilities from Equity (Topic 480), I. Derivatives and Hedging (Topic 815): Accounting for Certain Financial Instruments with Down Round Features and II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception.”

Prepaid Expenses and Other Curr

Prepaid Expenses and Other Current Assets	6 Months Ended
	Jun. 30, 2019
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid Expenses and Other Current Assets	3. PREPAID EXPENSES AND OTHER CURRENT ASSETS Prepaid expenses and other current assets as of June 30, 2019 and December 31, 2018 consisted of the following: June 30, December 31, 2019 2018 (in thousands) Other prepaid expenses $ 1,142 $ 971 Prepaid insurance 2,151 1,397 Prepaid leases 99 92 Supply inventory 306 306 Total $ 3,698 $ 2,766 On June 28, 2019, the Partnership entered into a settlement agreement with a third party which allowed the third party to maintain certain pipelines pursuant to designated permits at our Central Appalachia operations. The agreement required the third party to pay the Partnership $7.0 million in consideration. The Partnership received $4.2 million on July 3, 2019 with the balance of $2.8 million due on or before February 29, 2020. At June 30, 2019, the $7.0 million receivable was recorded in Receivable –Other on the Partnership’s unaudited condensed consolidated statements of financial position and a gain of $6.9 million was recorded on the Partnership’s unaudited condensed consolidated statements of operations and comprehensive income. The Partnership acquired 568,794 shares of Mammoth Energy Services, Inc. (NASDAQ: TUSK)(“Mammoth Inc.”) through a series of transactions in years prior to 2018. As of December 31, 2018, the Partnership owned 104,100 shares of Mammoth Inc., which were recorded at fair market value as a current asset on the Partnership’s consolidated statements of financial position. During the three months ended March 31, 2019, the Partnership sold its 104,100 shares for net consideration of approximately $2.3 million.

Property, Plant and Equipment

Property, Plant and Equipment	6 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	4. PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment, including coal properties and mine development and construction costs, as of June 30, 2019 and December 31, 2018 are summarized by major classification as follows: June 30, December 31, Useful Lives 2019 2018 (in thousands) Land and land improvements $ 10,416 $ 13,181 Mining and other equipment and related facilities 2 - 20 Years 311,197 307,300 Mine development costs 1 - 15 Years 64,757 63,681 Coal properties 1 - 15 Years 63,461 63,527 Construction work in process 3,167 3,199 Total 452,998 450,888 Less accumulated depreciation, depletion and amortization (287,855 ) (277,029 ) Net $ 165,143 $ 173,859 Depreciation expense for mining and other equipment and related facilities, depletion expense for coal properties, amortization expense for mine development costs and amortization expense for asset retirement costs for the three and six months ended June 30, 2019 and 2018 were as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 (in thousands) Depreciation expense-mining and other equipment and related facilities $ 4,216 $ 4,244 $ 8,380 $ 8,331 Depletion expense for coal properties 482 481 948 953 Amortization expense for mine development costs 843 821 1,687 1,570 Amortization expense for asset retirement costs 75 131 151 250 Total $ 5,616 $ 5,677 $ 11,166 $ 11,104

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	5. LEASES The Partnership leases various mining, transportation and other equipment under operating and finance leases. The leases have remaining lease terms of 1 year to 9 years, some of which include options to extend the leases for up to 15 years. The Partnership determines if an arrangement is a lease at inception. Some of the leases include both lease and non-lease components which are accounted for as a single lease component as the Partnership has elected the practical expedient to combine these components for all leases. Operating leases are included in operating lease right-of-use (“ROU”) assets, current liabilities and non-current liabilities. Finance leases are included in plant, property and equipment, current liabilities and long-term liabilities. ROU assets represent the Partnership’s right to use an underlying asset for the lease term and lease liabilities represent the Partnership’s obligation to make lease payments related to the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. The Partnership utilizes the implicit rate in the lease, if determinable, at the commencement date of the lease to determine the present value of the lease payments. If the implicit rate is not determinable, the Partnership utilizes its incremental borrowing rate at the commencement date of the lease to determine the present value of the lease payments. The Partnership’s lease terms may include options to extend or terminate the lease when it is reasonably certain that the Partnership will exercise the option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. Supplemental information related to leases was as follows: Six months ended (in thousands) Operating leases Operating lease right-of use assets $ 12,759 Operating lease liabilities-current $ 3,211 Operating lease liabilities-long-term 9,181 Total operating lease liabilities $ 12,392 Finance leases Property. Plant and Equipment, gross $ 10 Accumulated depreciation (2 ) Total Property, Plant and Equipment, net $ 8 Finance leases - current portion $ 4 Finance leases - noncurrent portion 3 Total finance lease obligation $ 7 Weighted Average Discount Rates and Lease Terms Six months ended Weighted Average Discount Rate Operating leases 7.0 % Finance leases 7.0 % Weighted Average Lease Term Operating leases 5.45 years Finance leases 2.25 years Supplemental cash flow information related to leases was as follows: Six months ended June 30, 2019 (in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 1,950 Operating cash flows for finance leases $ - Financing cash flows for finance leases $ 2 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 13,896 Finance leases $ 10 Maturities of lease liabilities are as follows: Operating leases Finance leases (in thousands) Year ending December 31, 2019(excluding the six months ended June 30, 2019) $ 2,011 $ 3 2020 3,444 4 2021 2,561 - 2022 1,031 - 2023 912 - Thereafter 2,878 - Total lease payments 12,837 7 Less imputed interest 445 - Total $ 12,392 $ 7 The components of lease expense were as follows: Three months ended Six months ended (in thousands) Operating lease cost $ 983 $ 1,966 Finance lease cost: Amortization of right-of-use assets $ 1 $ 2 Interest on lease liabilities - - Total finance lease cost $ 1 $ 2

Other Non-Current Assets

Other Non-Current Assets	6 Months Ended
	Jun. 30, 2019
Other Assets, Noncurrent Disclosure [Abstract]
Other Non-Current Assets	6. OTHER NON-CURRENT ASSETS Other non-current assets as of June 30, 2019 and December 31, 2018 consisted of the following: June 30, December 31, 2019 2018 (in thousands) Deposits and other $ 864 $ 1,144 Due (to) Rhino GP (77 ) (84 ) Non-current receivable 24,192 24,192 Deferred expenses 144 158 Total $ 25,123 $ 25,410 Non-current receivable Balance Sheet

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	6 Months Ended
	Jun. 30, 2019
Payables and Accruals [Abstract]
Accrued Expenses and Other Current Liabilities	7. ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES Accrued expenses and other current liabilities as of June 30, 2019 and December 31, 2018 consisted of the following: June 30, December 31, 2019 2018 (in thousands) Payroll, bonus and vacation expense $ 2,595 $ 2,151 Non-income taxes 3,066 2,168 Royalty expenses 2,230 1,669 Accrued interest 53 35 Health claims 857 868 Workers’ compensation & pneumoconiosis 1,900 1,900 Other 1,293 1,316 Total $ 11,994 $ 10,107

Debt

Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Debt	8. DEBT Debt as of June 30, 2019 and December 31, 2018 consisted of the following: June 30, December 31, 2019 2018 (in thousands) Note payable -Financing Agreement $ 28,298 $ 29,048 Note payable-other debt 1,772 522 Finance lease obligation 7 - Net unamortized debt issuance costs (3,704 ) (4,095 ) Net unamortized original issue discount (632 ) (843 ) Total 25,741 24,632 Less current portion (5,036 ) (2,174 ) Long-term debt $ 20,705 $ 22,458 Financing Agreement On December 27, 2017, the Operating Company, a wholly-owned subsidiary of the Partnership, certain of the Operating Company’s subsidiaries identified as Borrowers (together with the Operating Company, the “Borrowers”), the Partnership and certain other Operating Company subsidiaries identified as Guarantors (together with the Partnership, the “Guarantors”), entered into a Financing Agreement (the “Financing Agreement”) with Cortland Capital Market Services LLC, as Collateral Agent and Administrative agent, CB Agent Services LLC, as Origination Agent and the parties identified as Lenders therein (the “Lenders”), pursuant to which the Lenders agreed to provide the Borrowers with a multi-draw term loan in the original aggregate principal amount of $80 million, subject to the terms and conditions set forth in the Financing Agreement. The total principal amount is divided into a $40 million commitment, the conditions of which were satisfied at the execution of the Financing Agreement (the “Effective Date Term Loan Commitment”) and an additional $35 million commitment that is contingent upon the satisfaction of certain conditions precedent specified in the Financing Agreement (“Delayed Draw Term Loan Commitment”). Loans made pursuant to the Financing Agreement are secured by substantially all of the Borrowers’ and Guarantors’ assets. The Financing Agreement terminates on December 27, 2020. Loans made pursuant to the Financing Agreement are, at the Operating Company’s option, either “Reference Rate Loans” or “LIBOR Rate Loans.” Reference Rate Loans bear interest at the greatest of (a) 4.25% per annum, (b) the Federal Funds Rate plus 0.50% per annum, (c) the LIBOR Rate (calculated on a one-month basis) plus 1.00% per annum or (d) the Prime Rate (as published in the Wall Street Journal) or if no such rate is published, the interest rate published by the Federal Reserve Board as the “bank prime loan” rate or similar rate quoted therein, in each case, plus an applicable margin of 9.00% per annum (or 12.00% per annum if the Operating Company has elected to capitalize an interest payment pursuant to the PIK Option, as described below). LIBOR Rate Loans bear interest at the greater of (x) the LIBOR for such interest period divided by 100% minus the maximum percentage prescribed by the Federal Reserve for determining the reserve requirements in effect with respect to eurocurrency liabilities for any Lender, if any, and (y) 1.00%, in each case, plus 10.00% per annum (or 13.00% per annum if the Borrowers have elected to capitalize an interest payment pursuant to the PIK Option). Interest payments are due on a monthly basis for Reference Rate Loans and one-, two- or three-month periods, at the Operating Company’s option, for LIBOR Rate Loans. If there is no event of default occurring or continuing, the Operating Company may elect to defer payment on interest accruing at 6.00% per annum by capitalizing and adding such interest payment to the principal amount of the applicable term loan (the “PIK Option”). Commencing December 31, 2018, the principal for each loan made under the Financing Agreement will be payable on a quarterly basis in an amount equal to $375,000 per quarter, with all remaining unpaid principal and accrued and unpaid interest due on December 27, 2020. In addition, the Borrowers must make certain prepayments over the term of any loans outstanding, including: (i) the payment of 25% of Excess Cash Flow (as that term is defined in the Financing Agreement) of the Partnership and its subsidiaries for each fiscal year, commencing with respect to the year ending December 31, 2019, (ii) subject to certain exceptions, the payment of 100% of the net cash proceeds from the dispositions of certain assets, the incurrence of certain indebtedness or receipts of cash outside of the ordinary course of business, and (iii) the payment of the excess of the outstanding principal amount of term loans outstanding over the amount of the Collateral Coverage Amount (as that term is defined in the Financing Agreement). In addition, the Lenders are entitled to (i) certain fees, including 1.50% per annum of the unused Delayed Draw Term Loan Commitment for as long as such commitment exists, (ii) for the 12-month period following the execution of the Financing Agreement, a make-whole amount equal to the interest and unused Delayed Draw Term Loan Commitment fees that would have been payable but for the occurrence of certain events, including among others, bankruptcy proceedings or the termination of the Financing Agreement by the Operating Company, and (iii) audit and collateral monitoring fees and origination and exit fees. The Financing Agreement requires the Borrowers and Guarantor to comply with several affirmative covenants at any time loans are outstanding, including, among others: (i) the requirement to deliver monthly, quarterly and annual financial statements, (ii) the requirement to periodically deliver certificates indicating, among other things, (a) compliance with terms of the Financing Agreement and ancillary loan documents, (b) inventory, accounts payable, sales and production numbers, (c) the calculation of the Collateral Coverage Amount (as that term is defined in the Financing Agreement), (d) projections for the Partnership and its subsidiaries and (e) coal reserve amounts; (iii) the requirement to notify the Administrative Agent of certain events, including events of default under the Financing Agreement, dispositions, entry into material contracts, (iv) the requirement to maintain insurance, obtain permits, and comply with environmental and reclamation laws (v) the requirement to sell up to $5.0 million of shares in Mammoth Inc. and use the net proceeds therefrom to prepay outstanding term loans, which was completed during the first half of 2018 and (vi) establish and maintain cash management services and establish a cash management account and deliver a control agreement with respect to such account to the Collateral Agent. The Financing Agreement also contains negative covenants that restrict the Borrowers and Guarantors ability to, among other things: (i) incur liens or additional indebtedness or make investments or restricted payments, (ii) liquidate or merge with another entity, or dispose of assets, (iii) change the nature of their respective businesses; (iv) make capital expenditures in excess, or, with respect to maintenance capital expenditures, lower than, specified amounts, (v) incur restrictions on the payment of dividends, (vi) prepay or modify the terms of other indebtedness, (vii) permit the Collateral Coverage Amount to be less than the outstanding principal amount of the loans outstanding under the Financing Agreement or (viii) permit the trailing six month Fixed Charge Coverage Ratio of the Partnership and its subsidiaries to be less than 1.20 to 1.00 commencing with the six-month period ending June 30, 2018. The Financing Agreement contains customary events of default, following which the Collateral Agent may, at the request of lenders, terminate or reduce all commitments and accelerate the maturity of all outstanding loans to become due and payable immediately together with accrued and unpaid interest thereon and exercise any such other rights as specified under the Financing Agreement and ancillary loan documents. The Partnership entered into a warrant agreement with certain parties that are also parties to the Financing Agreement discussed above. (See Note 11 for further discussion) On April 17, 2018, Rhino amended its Financing Agreement to allow for certain activities including a sale leaseback of certain pieces of equipment, the extension of the due date for lease consents required under the Financing Agreement to June 30, 2018 and the distribution to holders of the Series A preferred units of $6.0 million (accrued in the consolidated financial statements at December 31, 2017). Additionally, the amendments provided that the Partnership could sell additional shares of Mammoth Inc. stock and retain 50% of the proceeds with the other 50% used to reduce debt. The Partnership reduced its outstanding debt by $3.4 million with proceeds from the sale of Mammoth Inc. stock in the second quarter of 2018. On July 27, 2018, the Partnership entered into a consent with its Lenders related to the Financing Agreement. The consent included the lenders agreement to make a $5 million loan from the Delayed Draw Term Loan Commitment, which was repaid in full on October 26, 2018 pursuant to the terms of the consent. The consent also included a waiver of the requirements relating to the use of proceeds of any sale of the shares of Mammoth Inc. set forth in the consent to the Financing Agreement, dated as of April 17, 2018 and also waived any Event of Default that arose or would otherwise arise under the Financing Agreement for failing to comply with the Fixed Charge Coverage Ratio for the six months ended June 30, 2018. On November 8, 2018, the Partnership entered into a consent with its Lenders related to the Financing Agreement. The consent includes the lenders agreement to waive any Event of Default that arose or would otherwise arise under the Financing Agreement for failing to comply with the Fixed Charge Coverage Ratio for the six months ended September 30, 2018. On December 20, 2018, the Partnership, entered into a limited waiver and consent (the “Waiver”) to the Financing Agreement. The Waiver relates to the sales by the Partnership of certain real property in Western Colorado, the net proceeds of which are required to be used to reduce the Partnership’s debt under the Financing Agreement. As of the date of the Waiver, the Partnership had sold 9 individual lots in smaller transactions. On December 31, 2018, the Partnership used the sale proceeds of approximately $379,000 to reduce the debt. Rather than transmitting net proceeds with respect to each individual transaction, the Partnership and Lenders agreed in principle to delay repayment until an aggregate payment could be made at the end of 2018. The Waiver (i) contains a ratification by the Lenders of the sale of the individual lots to date and waives the associated technical defaults under the Financing Agreement for not making immediate payments of net proceeds therefrom, (ii) permits the sale of certain specified additional lots and (iii) subject to Lender consent, permits the sale of other lots on a going forward basis. The net proceeds of future sales will be held by the Partnership until a later date to be determined by the Lenders. On February 13, 2019, the Partnership entered into a second amendment (the “Amendment”) to the Financing Agreement. The Amendment provided the Lender’s consent for the Partnership to pay a one-time cash distribution on February 14, 2019 to the Series A Preferred Unitholders not to exceed approximately $3.2 million. The Amendment allowed the Partnership to sell its remaining shares of Mammoth Inc. and utilize the proceeds for payment of the one-time cash distribution to the Series A Preferred Unitholders and waived the requirement to use such proceeds to prepay the outstanding principal amount outstanding under the Financing Agreement. The Amendment also waived any Event of Default that has or would otherwise arise under Section 9.01(c) of the Financing Agreement solely by reason of the Borrowers failing to comply with the Fixed Charge Coverage Ratio covenant in Section 7.03(b) of the Financing Agreement for the fiscal quarter ending December 31, 2018. The Amendment includes an amendment fee of approximately $0.6 million payable by the Partnership on May 13, 2019 and an exit fee equal to 1% of the principal amount of the term loans made under the Financing Agreement that is payable on the earliest of (w) the final maturity date of the Financing Agreement, (x) the termination date of the Financing Agreement, (y) the acceleration of the obligations under the Financing Agreement for any reason, including, without limitation, acceleration in accordance with Section 9.01 of the Financing Agreement, including as a result of the commencement of an insolvency proceeding and (z) the date of any refinancing of the term loan under the Financing Agreement. The Amendment amended the definition of the Make-Whole Amount under the Financing Agreement to extend the date of the Make-Whole Amount period to December 31, 2019. On May 8, 2019, the Partnership entered into a third amendment (“Third Amendment”) to the Financing Agreement. The Third Amendment includes the lenders agreement to waive any Event of Default that arose or would otherwise arise under the Financing Agreement for failing to comply with the Fixed Charge Coverage Ratio for the six months ended March 31, 2019. The Third Amendment increases the original exit fee of 3.0% to 6.0%. The original exit fee of 3% was included in the Financing Agreement at the execution date and the increase of the total exit fee to 6% was included as part of the amendment dated February 13, 2019 discussed above and this Third Amendment. The exit fee is applied to the principal amount of the loans made under the Financing Agreement that is payable on the earliest of (a) the final maturity date, (b) the termination date of the Financing agreement for any reason, (c) the acceleration of the obligations in the Financing Agreement for any reason and (d) the date of any refinancing of the term loan under the Financing Agreement. At June 30, 2019, the Partnership had $28.3 million of borrowings outstanding at a variable interest rate of Libor plus 10.00% (12.41%).

Asset Retirement Obligations

Asset Retirement Obligations	6 Months Ended
	Jun. 30, 2019
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	9. ASSET RETIREMENT OBLIGATIONS The changes in asset retirement obligations for the six months ended June 30, 2019 and the year ended December 31, 2018 are as follows: June 30, 2019 December 31, 2018 (in thousands) Balance at beginning of period (including current portion) $ 18,549 $ 18,662 Accretion expense 638 1,269 Adjustments to the liability from annual recosting and other - (1,083 ) Liabilities settled (76 ) (299 ) Balance at end of period 19,111 18,549 Less current portion of asset retirement obligation (465 ) (465 ) Long-term portion of asset retirement obligation $ 18,646 $ 18,084

Employee Benefits

Employee Benefits	6 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Employee Benefits	10. EMPLOYEE BENEFITS 401(k) Plans The Operating Company sponsors a defined contribution savings plans for all employees. Under the defined contribution savings plan, the Operating Company matches voluntary contributions of participants up to a maximum contribution based upon a percentage of a participant’s salary with an additional matching contribution possible at the Partnership’s discretion. The expense under these plans for the three and six months ended June 30, 2019 and 2018 is included in Cost of operations and Selling, general and administrative expense in the Partnership’s unaudited condensed consolidated statements of operations and comprehensive income and was as follows: Three Months Ended June 30, Six months ended June 30, 2019 2018 2019 2018 (in thousands) 401(k) plan expense $ 470 $ 393 $ 959 $ 829

Partners' Capital

Partners' Capital	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Partners' Capital	11. PARTNERS’ CAPITAL Common Unit Warrants In December 2017, the Partnership entered into a warrant agreement with certain parties that are also parties to the Financing Agreement discussed above. The warrant agreement included the issuance of a total of 683,888 warrants for common units (“Common Unit Warrants”) of the Partnership at an exercise price of $1.95 per unit, which was the closing price of the Partnership’s common units on the OTC market as of December 27, 2017. The Common Unit Warrants have a five year expiration date. The Common Unit Warrants and the Partnership’s common units after exercise are both transferable, subject to applicable US securities laws. The Common Unit Warrant exercise price is $1.95 per unit, but the price per unit will be reduced by future common unit distributions and other further adjustments in price included in the warrant agreement for transactions that are dilutive to the amount of the Partnership’s common units outstanding. The warrant agreement includes a provision for a cashless exercise whereby the warrant holders can receive a net number of common units. Per the warrant agreement, the warrants are detached from the Financing Agreement and fully transferable. The Partnership analyzed the Common Unit Warrants in accordance with the applicable accounting literature and concluded the Common Unit Warrants should be classified as equity. The Partnership allocated the $40.0 million proceeds from the Financing Agreement between the Common Unit Warrants and the Financing Agreement based upon their relative fair values. The allocation based upon relative fair values resulted in approximately $1.3 million being recorded for the Common Unit Warrants in the Partner’s Capital equity section and a corresponding discount on Long-term debt, net on the Partnership’s consolidated statements of financial position. Series A Preferred Units On December 30, 2016, the general partner entered into the Fourth Amended and Restated Agreement of Limited Partnership of the Partnership (“Amended and Restated Partnership Agreement”) to create, authorize and issue the Series A preferred units. The Series A preferred units rank senior to all classes or series of equity securities of the Partnership with respect to distribution rights and rights upon liquidation. The holders of the Series A preferred units are entitled to receive annual distributions equal to the greater of (i) 50% of the CAM Mining free cash flow (as defined below) and (ii) an amount equal to the number of outstanding Series A preferred units multiplied by $0.80. “CAM Mining free cash flow” is defined in the Amended and Restated Partnership Agreement as (i) the total revenue of the Partnership’s Central Appalachia business segment, minus (ii) the cost of operations (exclusive of depreciation, depletion and amortization) for the Partnership’s Central Appalachia business segment, minus (iii) an amount equal to $6.50, multiplied by the aggregate number of coal tons sold by the Partnership from its Central Appalachia business segment. If the Partnership fails to pay any or all of the distributions in respect of the Series A preferred units, such deficiency will accrue until paid in full and the Partnership will not be permitted to pay any distributions on its Partnership interests that rank junior to the Series A preferred units, including its common units. The Series A preferred units will be liquidated in accordance with their capital accounts and upon liquidation will be entitled to distributions of property and cash in accordance with the balances of their capital accounts prior to such distributions on equity securities that rank junior to the Series A preferred units. The Series A preferred units vote on an as-converted basis with the common units, and the Partnership is restricted from taking certain actions without the consent of the holders of a majority of the Series A preferred units, including: (i) the issuance of additional Series A preferred units, or securities that rank senior or equal to the Series A preferred units; (ii) the sale or transfer of CAM Mining or a material portion of its assets; (iii) the repurchase of common units, or the issuance of rights or warrants to holders of common units entitling them to purchase common units at less than fair market value; (iv) consummation of a spin off; (v) the incurrence, assumption or guaranty of indebtedness for borrowed money in excess of $50.0 million except indebtedness relating to entities or assets that are acquired by the Partnership or its affiliates that is in existence at the time of such acquisition or (vi) the modification of CAM Mining’s accounting principles or the financial or operational reporting principles of the Partnership’s Central Appalachia business segment, subject to certain exceptions. The Partnership has the option to convert the outstanding Series A preferred units at any time on or after the time at which the amount of aggregate distributions paid in respect of each Series A preferred unit exceeds $10.00 per unit. Each Series A preferred unit will convert into a number of common units equal to the quotient (the “Series A Conversion Ratio”) of (i) the sum of $10.00 and any unpaid distributions in respect of such Series A Preferred Unit divided by (ii) 75% of the volume-weighted average closing price of the common units for the preceding 90 trading days (the “VWAP”); provided however, that the VWAP will be capped at a minimum of $2.00 and a maximum of $10.00. On December 31, 2021, all outstanding Series A preferred units will convert into common units at the then applicable Series A Conversion Ratio. During the first quarter of 2019, the Partnership paid $3.2 million to the holders of Series A preferred units for distributions earned for the year ended December 31, 2018. During the first quarter of 2018, the Partnership paid the holders of Series A preferred units $6.0 million in distributions earned for the year ended December 31, 2017. The Partnership has accrued approximately $0.6 million for distributions to holders of the Series A preferred units for the six months ended June 30, 2019. Investment in Royal Common Stock On September 1, 2017, Royal elected to convert certain obligations to the Partnership totaling $4.1 million to shares of Royal common stock. Royal issued 914,797 shares of its common stock to the Partnership at a conversion price of $4.51 per share. The price per share was equal to the outstanding balance multiplied by seventy-five percent (75%) of the volume-weighted average closing price of Royal’s common stock for the 90 days preceding the date of conversion (“Royal VWAP”), subject to a minimum Royal VWAP of $3.50 and a maximum Royal VWAP of $7.50. The Partnership recorded the $4.1 million conversion as Investment in Royal common stock in the Partners’ Capital section of the Partnership’s unaudited condensed consolidated statements of financial position since Royal does not have significant economic activity apart from its investment in the Partnership. Other Comprehensive Income In accordance with Accounting Standards Codification (“ASU”) 2016-01, which was effective for fiscal years that began after December 15, 2017, the Partnership ceased recording fair market adjustments for the shares it owns in Mammoth Inc. in Other Comprehensive Income during the fourth quarter of 2018. Upon adoption during the fourth quarter of 2018, the Partnership recorded a $4.2 million reclassification from Other Comprehensive Income to Partners’ Capital relating to its Mammoth Inc. shares that had a readily determinable fair value. Accumulated Distribution Arrearages Pursuant to the Partnership’s partnership agreement, the Partnership’s common units accrue arrearages every quarter when the distribution level is below the minimum level of $4.45 per unit. Beginning with the quarter ended June 30, 2015 and continuing through the quarter ended March 31, 2019, the Partnership has suspended the cash distribution on its common units. For each of the quarters ended September 30, 2014, December 31, 2014 and March 31, 2015, the Partnership announced cash distributions per common unit at levels lower than the minimum quarterly distribution. The Partnership has not paid any distribution on its subordinated units for any quarter after the quarter ended March 31, 2012. As of June 30, 2019, the Partnership had accumulated arrearages of $790.2 million.

Earnings Per Unit ('EPU')

Earnings Per Unit ('EPU')	6 Months Ended
	Jun. 30, 2019
Earnings Per Unit [Abstract]
Earnings Per Unit ("EPU")	12. EARNINGS PER UNIT (“EPU”) The following table presents a reconciliation of the numerators and denominators of the basic and diluted EPU calculations for the periods ended June 30, 2019 and 2018: Three Months Ended June 30, 2019 General Partner Common Unitholders Subordinated Unitholders Preferred Unitholders (in thousands, except per unit data) Numerator: Interest in net (loss)/ income $ (1 ) $ (172 ) $ (15 ) $ 300 Denominator: Weighted average units used to compute basic EPU n/a 13,098 1,143 1,500 Weighted average units used to compute diluted EPU n/a 13,098 1,143 1,500 Net (loss)/income per limited partner unit, basic: n/a $ (0.01 ) $ (0.01 ) $ 0.20 Net (loss)/income per limited partner unit, diluted n/a $ (0.01 ) $ (0.01 ) $ 0.20 Three Months Ended June 30, 2018 General Partner Common Unitholders Subordinated Unitholders Preferred Unitholders (in thousands, except per unit data) Numerator: Interest in net (loss)/income $ (14 ) $ (3,061 ) $ (269 ) $ 309 Denominator: Weighted average units used to compute basic EPU n/a 13,055 1,146 $ 1,500 Weighted average units used to compute diluted EPU n/a 13,055 1,146 $ 1,500 Net (loss)/income per limited partner unit, basic n/a $ (0.23 ) $ (0.23 ) $ 0.21 Net (loss)/income per limited partner unit, diluted n/a $ (0.23 ) $ (0.23 ) $ 0.21 Six Months Ended June 30, 2019 General Partner Common Unitholders Subordinated Unitholders Preferred Unitholders (in thousands, except per unit data) Numerator: Interest in net (loss)/ income $ (32 ) $ (7,114 ) $ (621 ) $ 600 Denominator: Weighted average units used to compute basic EPU n/a 13,098 1,144 1,500 Weighted average units used to compute diluted EPU n/a 13,098 1,144 1,500 Net (loss)/income per limited partner unit, basic: n/a $ (0.54 ) $ (0.54 ) $ 0.40 Net (loss)/income per limited partner unit, diluted n/a $ (0.54 ) $ (0.54 ) $ 0.40 Six Months Ended June 30, 2018 General Partner Common Unitholders Subordinated Unitholders Preferred Unitholders (in thousands, except per unit data) Numerator: Interest in net (loss)/income $ (27 ) $ (5,917 ) $ (521 ) $ 609 Denominator: Weighted average units used to compute basic EPU n/a 13,009 1,146 $ 1,500 Weighted average units used to compute diluted EPU n/a 13,009 1,146 $ 1,500 Net (loss)/income per limited partner unit, basic n/a $ (0.45 ) $ (0.45 ) $ 0.41 Net (loss)/income per limited partner unit, diluted n/a $ (0.45 ) $ (0.45 ) $ 0.41 Diluted EPU gives effect to all dilutive potential common units outstanding during the period using the treasury stock method. Diluted EPU excludes all dilutive potential units calculated under the treasury stock method if their effect is anti-dilutive. Since the Partnership incurred net losses for three months ended June 30, 2018 and for the six months ended June 30, 2019 and 2018, all potential dilutive units were excluded from the diluted EPU calculation for these periods because when an entity incurs a net loss in a period, potential dilutive units shall not be included in the computation of diluted EPU since their effect will always be anti-dilutive. The Partnership earned net income for the three months ended June 30, 2019, but did not have any potential dilutive units outstanding during the period. There were 683,888 potential dilutive common units related to the Common Unit Warrants as discussed in Note 11 for the six months ended June 30, 2019 and 2018.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	13. COMMITMENTS AND CONTINGENCIES Coal Sales Contracts and Contingencies Year Tons Number 2019 Q3-Q4 2,192 18 2020 2,180 7 2021 920 3 Some of the contracts have sales price adjustment provisions, subject to certain limitations and adjustments, based on a variety of factors and indices. Purchased Coal Expenses Leases Three Months Ended June 30, Six months ended June 30, 2019 2018 2019 2018 (in thousands) Lease expense $ 1,302 $ 976 $ 2,556 $ 1,406 Royalty expense $ 4,289 $ 3,467 $ 8,182 $ 7,111 Guarantees/Indemnifications and Financial Instruments with Off-Balance Sheet Risk

Major Customers

Major Customers	6 Months Ended
	Jun. 30, 2019
Risks and Uncertainties [Abstract]
Major Customers	14. MAJOR CUSTOMERS The Partnership had sales or receivables from the following major customers that in each period equaled or exceeded 10% of revenues: June 30, 2019 Receivable Balance December 31, 2018 Receivable Balance Six months ended June 30, 2019 Sales Six months ended June 30, 2018 Sales (in thousands) Javelin Global $ 3,816 $ 4,347 $ 24,527 $ 16,554 Integrity Coal $ - $ 937 $ 3,939 $ 11,364 Dominion Energy $ 683 $ - $ 3,826 $ 14,013

Revenue

Revenue	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue	15. REVENUE The Partnership adopted ASC Topic 606 on January 1, 2018, using the modified retrospective method. The adoption of Topic 606 has no impact on revenue amounts recorded on the Partnership’s financial statements. The new disclosures required by ASC Topic 606, as applicable, are presented below. The majority of the Partnership’s revenues are generated under coal sales contracts. Coal sales accounted for approximately 99.0% of the Partnership’s total revenues for the three and six months ended June 30, 2019 and 2018. Other revenues generally consist of coal royalty revenues, coal handling and processing revenues, rebates and rental income, which accounted for approximately 1.0% of the Partnership’s total revenues for the three and six months ended June 30, 2019 and 2018. The majority of the Partnership’s coal sales contracts have a single performance obligation (shipment or delivery of coal according to terms of the sales agreement) and as such, the Partnership is not required to allocate the contract’s transaction price to multiple performance obligations. All of the Partnership’s coal sales revenue is recognized when shipment or delivery to the customer has occurred, the title or risk of loss has passed in accordance with the terms of the coal sales agreement, prices are fixed or determinable and collectability is reasonably assured. With respect to other revenues recognized in situations unrelated to the shipment of coal, the Partnership carefully reviews the facts and circumstances of each transaction and does not recognize revenue until the following criteria are met: persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the seller’s price to the buyer is fixed or determinable and collectability is reasonably assured. In the tables below, the Partnership has disaggregated its revenue by category for each reportable segment as required by ASC Topic 606. The following table disaggregates revenue by type for each reportable segment for the three months ended June 30, 2019: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Coal sales Steam coal $ 9,749 $ 8,396 $ 8,422 $ 13,088 $ - $ 39,655 Met coal 25,437 - - - - 25,437 Other revenue 36 460 - - - 496 Total $ 35,222 $ 8,856 $ 8,422 $ 13,088 $ - $ 65,588 The following table disaggregates revenue by type for each reportable segment for the three months ended June 30, 2018: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Coal sales Steam coal $ 13,200 $ 3,904 $ 8,656 $ 13,608 $ - $ 39,368 Met coal 14,877 - - - - 14,877 Other revenue 56 517 - - 105 678 Total $ 28,133 $ 4,421 $ 8,656 $ 13,608 $ 105 $ 54,923 The following table disaggregates revenue by type for each reportable segment for the six months ended June 30, 2019: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Coal sales Steam coal $ 23,138 $ 14,461 $ 17,132 $ 26,089 $ - $ 80,820 Met coal 42,135 - - - - 42,135 Other revenue 357 1,014 - - - 1,371 Total $ 65,630 $ 15,475 $ 17,132 $ 26,089 $ - $ 124,326 The following table disaggregates revenue by type for each reportable segment for the six months ended June 30, 2018: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Coal sales Steam coal $ 24,861 $ 7,592 $ 16,716 $ 25,219 $ - $ 74,388 Met coal 34,129 - - - - 34,129 Other revenue 118 974 9 - 105 1,206 Total $ 59,108 $ 8,566 $ 16,725 $ 25,219 $ 105 $ 109,723

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	16. FAIR VALUE MEASUREMENTS The Partnership determines the fair value of assets and liabilities based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. The fair values are based on assumptions that market participants would use when pricing an asset or liability, including assumptions about risk and the risks inherent in valuation techniques and the inputs to valuations. The fair value hierarchy is based on whether the inputs to valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Partnership’s assumptions of what market participants would use. The fair value hierarchy includes three levels of inputs that may be used to measure fair value as described below: Level One - Quoted prices for identical instruments in active markets. Level Two - The fair value of the assets and liabilities included in Level 2 are based on standard industry income approach models that use significant observable inputs. Level Three - Unobservable inputs significant to the fair value measurement supported by little or no market activity. In those cases when the inputs used to measure fair value meet the definition of more than one level of the fair value hierarchy, the lowest level input that is significant to the fair value measurement in its totality determines the applicable level in the fair value hierarchy. The book values of cash and cash equivalents, accounts receivable and accounts payable are considered to be representative of their respective fair values because of the immediate short-term maturity of these financial instruments. The fair value of the Partnership’s Financing Agreement was determined based upon a market approach and approximates the carrying value at June 30, 2019. The fair value of the Partnership’s Financing Agreement is a Level 2 measurement. As of December 31, 2018, the Partnership had a recurring fair value measurement relating to its investment in Mammoth Inc. As discussed in Note 5, the Partnership sold the balance of its Mammoth Inc. shares (104,100 shares) during the first quarter of 2019. The Partnership’s shares of Mammoth Inc. were classified as an investment on the Partnership’s unaudited condensed consolidated statements of financial position as of December 31, 2018. Based on the availability of a quoted price, the recurring fair value measurement of the Mammoth Inc. shares was a Level 1 measurement.

Supplemental Disclosures of Cas

Supplemental Disclosures of Cash Flow Information	6 Months Ended
	Jun. 30, 2019
Supplemental Cash Flow Information [Abstract]
Supplemental Disclosures of Cash Flow Information	17. SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION Cash payments for interest were $2.2 million and $2.8 million for the six months ended June 30, 2019 and 2018, respectively. The unaudited condensed consolidated statement of cash flows for the six months ended June 30, 2019 and 2018 excludes approximately $2.3 million and $1.6 million, respectively, of property, plant and equipment additions which are recorded in Accounts payable.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Segment Information	18. SEGMENT INFORMATION The Partnership primarily produces and markets coal from surface and underground mines in Kentucky, West Virginia, Ohio and Utah. The Partnership sells primarily to electric utilities in the United States. As of June 30, 2019, the Partnership has four reportable business segments: Central Appalachia, Northern Appalachia, Rhino Western and Illinois Basin. Additionally, the Partnership has an Other category that includes its ancillary businesses. The Partnership has not provided disclosure of total expenditures by segment for long-lived assets, as the Partnership does not maintain discrete financial information concerning segment expenditures for long lived assets, and accordingly such information is not provided to the Partnership’s chief operating decision maker. The information provided in the following tables represents the primary measures used to assess segment performance by the Partnership’s chief operating decision maker. Reportable segment results of operations for the three months ended June 30, 2019 are as follows (Note: “DD&A” refers to depreciation, depletion and amortization): Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Total revenues $ 35,222 $ 8,856 $ 8,422 $ 13,088 $ - $ 65,588 DD&A 1,863 434 1,109 2,122 88 5,616 Interest expense - - - - 1,735 1,735 Net Income/(loss) $ 6,560 $ (692 ) $ 1,321 $ (2,760 ) $ (4,317 ) $ 112 Reportable segment results of operations for the three months ended June 30, 2018 are as follows: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Total revenues $ 28,133 $ 4,422 $ 8,656 $ 13,608 $ 104 $ 54,923 DD&A 2,263 300 1,041 1,979 94 5,677 Interest expense - - - - 1,913 1,913 Net Income/(loss) $ 997 $ (1,477 ) $ (63 ) $ (1,880 ) $ (612 ) $ (3,035 ) Reportable segment results of operations for the six months ended June 30, 2019 are as follows: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Total revenues $ 65,630 $ 15,475 $ 17,132 $ 26,089 $ - $ 124,326 DD&A 3,763 842 2,203 4,180 178 11,166 Interest expense - - - - 3,436 3,436 Net Income/(loss) $ 7,743 $ (1,814 ) $ 993 $ (6,347 ) $ (7,742 ) $ (7,167 ) Reportable segment results of operations for the six months ended June 30, 2018 are as follows: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Total revenues $ 59,108 $ 8,566 $ 16,725 $ 25,219 $ 105 $ 109,723 DD&A 4,459 441 2,102 3,918 184 11,104 Interest expense 1 - - - 3,797 3,798 Net Income/(loss) $ 1,927 $ (2,592 ) $ 900 $ (4,209 ) $ (1,882 ) $ (5,856 )

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	19. SUBSEQUENT EVENTS On July 9, 2019, the Partnership entered into an agreement with a third party for the replacement of the Partnership’s existing surety bond obligations with respect to Sands Hill Mining LLC. The Partnership agreed to pay the third party $2.0 million for the Partnership’s release of the surety bond obligations. At the time of closing, the third party delivered to the Partnership confirmation from its surety underwriter evidencing the release and removal of the Partnership, its affiliates and guarantors, from the surety bond obligations and all related obligations under the Partnership’s bonding agreements related to Sands Hill Mining LLC, which includes a release of all applicable collateral for the surety bond obligations. Further, such confirmation from the surety underwriter was specifically provided for their acceptance of the third party as a replacement obligor.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies and General (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Revenue Recognition	Revenue Recognition. Revenue from Contracts with Customers (Topic 606) Freight and handling costs paid directly to third-party carriers and invoiced separately to coal customers are recorded as freight and handling costs and freight and handling revenues, respectively. Freight and handling costs billed to customers as part of the contractual per ton revenue of customer contracts is included in coal sales revenue. Other revenues generally consist of coal royalty revenues, coal handling and processing revenues, rebates and rental income. With respect to other revenues recognized in situations unrelated to the shipment of coal, the Partnership carefully reviews the facts and circumstances of each transaction and does not recognize revenue until the following criteria are met: persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the seller’s price to the buyer is fixed or determinable and collectability is reasonably assured.
Debt Issuance Costs	Debt Issuance Costs.
Recently Issued Accounting Standards	Recently Issued Accounting Standards. Leases (Topic 842) In July 2017, the FASB issued ASU 2017-11, “Earnings Per Share (Topic 260): Distinguishing Liabilities from Equity (Topic 480), I. Derivatives and Hedging (Topic 815): Accounting for Certain Financial Instruments with Down Round Features and II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception.”

Prepaid Expenses and Other Cu_2

Prepaid Expenses and Other Current Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Prepaid Expense and Other Assets, Current [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets as of June 30, 2019 and December 31, 2018 consisted of the following: June 30, December 31, 2019 2018 (in thousands) Other prepaid expenses $ 1,142 $ 971 Prepaid insurance 2,151 1,397 Prepaid leases 99 92 Supply inventory 306 306 Total $ 3,698 $ 2,766

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	6 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment by Major Classification	Property, plant and equipment, including coal properties and mine development and construction costs, as of June 30, 2019 and December 31, 2018 are summarized by major classification as follows: June 30, December 31, Useful Lives 2019 2018 (in thousands) Land and land improvements $ 10,416 $ 13,181 Mining and other equipment and related facilities 2 - 20 Years 311,197 307,300 Mine development costs 1 - 15 Years 64,757 63,681 Coal properties 1 - 15 Years 63,461 63,527 Construction work in process 3,167 3,199 Total 452,998 450,888 Less accumulated depreciation, depletion and amortization (287,855 ) (277,029 ) Net $ 165,143 $ 173,859
Schedule of Depreciation, Depletion and Amortization	Depreciation expense for mining and other equipment and related facilities, depletion expense for coal properties, amortization expense for mine development costs and amortization expense for asset retirement costs for the three and six months ended June 30, 2019 and 2018 were as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 (in thousands) Depreciation expense-mining and other equipment and related facilities $ 4,216 $ 4,244 $ 8,380 $ 8,331 Depletion expense for coal properties 482 481 948 953 Amortization expense for mine development costs 843 821 1,687 1,570 Amortization expense for asset retirement costs 75 131 151 250 Total $ 5,616 $ 5,677 $ 11,166 $ 11,104

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Schedule of Supplemental Balance Sheet Information Related to Leases	Supplemental information related to leases was as follows: Six months ended (in thousands) Operating leases Operating lease right-of use assets $ 12,759 Operating lease liabilities-current $ 3,211 Operating lease liabilities-long-term 9,181 Total operating lease liabilities $ 12,392 Finance leases Property. Plant and Equipment, gross $ 10 Accumulated depreciation (2 ) Total Property, Plant and Equipment, net $ 8 Finance leases - current portion $ 4 Finance leases - noncurrent portion 3 Total finance lease obligation $ 7
Schedule of Weighted Average Discount Rates and Lease Terms	Weighted Average Discount Rates and Lease Terms Six months ended Weighted Average Discount Rate Operating leases 7.0 % Finance leases 7.0 % Weighted Average Lease Term Operating leases 5.45 years Finance leases 2.25 years
Schedule of Supplemental Cash Flow Information Related to Leases	Supplemental cash flow information related to leases was as follows: Six months ended June 30, 2019 (in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 1,950 Operating cash flows for finance leases $ - Financing cash flows for finance leases $ 2 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 13,896 Finance leases $ 10
Schedule of Maturities of Lease Liabilities	Maturities of lease liabilities are as follows: Operating leases Finance leases (in thousands) Year ending December 31, 2019(excluding the six months ended June 30, 2019) $ 2,011 $ 3 2020 3,444 4 2021 2,561 - 2022 1,031 - 2023 912 - Thereafter 2,878 - Total lease payments 12,837 7 Less imputed interest 445 - Total $ 12,392 $ 7
Schedule of Components of Lease Expense	The components of lease expense were as follows: Three months ended Six months ended (in thousands) Operating lease cost $ 983 $ 1,966 Finance lease cost: Amortization of right-of-use assets $ 1 $ 2 Interest on lease liabilities - - Total finance lease cost $ 1 $ 2

Other Non-Current Assets (Table

Other Non-Current Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Other Assets, Noncurrent Disclosure [Abstract]
Schedule of Other Non-Current Assets	Other non-current assets as of June 30, 2019 and December 31, 2018 consisted of the following: June 30, December 31, 2019 2018 (in thousands) Deposits and other $ 864 $ 1,144 Due (to) Rhino GP (77 ) (84 ) Non-current receivable 24,192 24,192 Deferred expenses 144 158 Total $ 25,123 $ 25,410

Accrued Expenses and Other Cu_2

Accrued Expenses and Other Current Liabilities (Tables)	6 Months Ended
	Jun. 30, 2019
Payables and Accruals [Abstract]
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities as of June 30, 2019 and December 31, 2018 consisted of the following: June 30, December 31, 2019 2018 (in thousands) Payroll, bonus and vacation expense $ 2,595 $ 2,151 Non-income taxes 3,066 2,168 Royalty expenses 2,230 1,669 Accrued interest 53 35 Health claims 857 868 Workers’ compensation & pneumoconiosis 1,900 1,900 Other 1,293 1,316 Total $ 11,994 $ 10,107

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Schedule of Debt	Debt as of June 30, 2019 and December 31, 2018 consisted of the following: June 30, December 31, 2019 2018 (in thousands) Note payable -Financing Agreement $ 28,298 $ 29,048 Note payable-other debt 1,772 522 Finance lease obligation 7 - Net unamortized debt issuance costs (3,704 ) (4,095 ) Net unamortized original issue discount (632 ) (843 ) Total 25,741 24,632 Less current portion (5,036 ) (2,174 ) Long-term debt $ 20,705 $ 22,458

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	6 Months Ended
	Jun. 30, 2019
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Asset Retirement Obligations	The changes in asset retirement obligations for the six months ended June 30, 2019 and the year ended December 31, 2018 are as follows: June 30, 2019 December 31, 2018 (in thousands) Balance at beginning of period (including current portion) $ 18,549 $ 18,662 Accretion expense 638 1,269 Adjustments to the liability from annual recosting and other - (1,083 ) Liabilities settled (76 ) (299 ) Balance at end of period 19,111 18,549 Less current portion of asset retirement obligation (465 ) (465 ) Long-term portion of asset retirement obligation $ 18,646 $ 18,084

Employee Benefits (Tables)

Employee Benefits (Tables)	6 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Schedule of Expense Under Defined Contribution Savings Plan	The expense under these plans for the three and six months ended June 30, 2019 and 2018 is included in Cost of operations and Selling, general and administrative expense in the Partnership’s unaudited condensed consolidated statements of operations and comprehensive income and was as follows: Three Months Ended June 30, Six months ended June 30, 2019 2018 2019 2018 (in thousands) 401(k) plan expense $ 470 $ 393 $ 959 $ 829

Earnings Per Unit ('EPU') (Tabl

Earnings Per Unit ('EPU') (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Unit [Abstract]
Schedule of Calculation of Numerator and Denominator in Earnings Per Unit	The following table presents a reconciliation of the numerators and denominators of the basic and diluted EPU calculations for the periods ended June 30, 2019 and 2018: Three Months Ended June 30, 2019 General Partner Common Unitholders Subordinated Unitholders Preferred Unitholders (in thousands, except per unit data) Numerator: Interest in net (loss)/ income $ (1 ) $ (172 ) $ (15 ) $ 300 Denominator: Weighted average units used to compute basic EPU n/a 13,098 1,143 1,500 Weighted average units used to compute diluted EPU n/a 13,098 1,143 1,500 Net (loss)/income per limited partner unit, basic: n/a $ (0.01 ) $ (0.01 ) $ 0.20 Net (loss)/income per limited partner unit, diluted n/a $ (0.01 ) $ (0.01 ) $ 0.20 Three Months Ended June 30, 2018 General Partner Common Unitholders Subordinated Unitholders Preferred Unitholders (in thousands, except per unit data) Numerator: Interest in net (loss)/income $ (14 ) $ (3,061 ) $ (269 ) $ 309 Denominator: Weighted average units used to compute basic EPU n/a 13,055 1,146 $ 1,500 Weighted average units used to compute diluted EPU n/a 13,055 1,146 $ 1,500 Net (loss)/income per limited partner unit, basic n/a $ (0.23 ) $ (0.23 ) $ 0.21 Net (loss)/income per limited partner unit, diluted n/a $ (0.23 ) $ (0.23 ) $ 0.21 Six Months Ended June 30, 2019 General Partner Common Unitholders Subordinated Unitholders Preferred Unitholders (in thousands, except per unit data) Numerator: Interest in net (loss)/ income $ (32 ) $ (7,114 ) $ (621 ) $ 600 Denominator: Weighted average units used to compute basic EPU n/a 13,098 1,144 1,500 Weighted average units used to compute diluted EPU n/a 13,098 1,144 1,500 Net (loss)/income per limited partner unit, basic: n/a $ (0.54 ) $ (0.54 ) $ 0.40 Net (loss)/income per limited partner unit, diluted n/a $ (0.54 ) $ (0.54 ) $ 0.40 Six Months Ended June 30, 2018 General Partner Common Unitholders Subordinated Unitholders Preferred Unitholders (in thousands, except per unit data) Numerator: Interest in net (loss)/income $ (27 ) $ (5,917 ) $ (521 ) $ 609 Denominator: Weighted average units used to compute basic EPU n/a 13,009 1,146 $ 1,500 Weighted average units used to compute diluted EPU n/a 13,009 1,146 $ 1,500 Net (loss)/income per limited partner unit, basic n/a $ (0.45 ) $ (0.45 ) $ 0.41 Net (loss)/income per limited partner unit, diluted n/a $ (0.45 ) $ (0.45 ) $ 0.41

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of Delivery Commitments	As of June 30, 2019, the Partnership had commitments under sales contracts to deliver annually scheduled base quantities of coal as follows: Year Tons Number 2019 Q3-Q4 2,192 18 2020 2,180 7 2021 920 3
Schedule of Lease and Royalty Expense	Lease and royalty expense for the three and six months ended June 30, 2019 and 2018 are included in Cost of operations in the Partnership’s unaudited condensed consolidated statements of operations and comprehensive income and was as follows: Three Months Ended June 30, Six months ended June 30, 2019 2018 2019 2018 (in thousands) Lease expense $ 1,302 $ 976 $ 2,556 $ 1,406 Royalty expense $ 4,289 $ 3,467 $ 8,182 $ 7,111

Major Customers (Tables)

Major Customers (Tables)	6 Months Ended
	Jun. 30, 2019
Risks and Uncertainties [Abstract]
Summary of Major Customers	The Partnership had sales or receivables from the following major customers that in each period equaled or exceeded 10% of revenues: June 30, 2019 Receivable Balance December 31, 2018 Receivable Balance Six months ended June 30, 2019 Sales Six months ended June 30, 2018 Sales (in thousands) Javelin Global $ 3,816 $ 4,347 $ 24,527 $ 16,554 Integrity Coal $ - $ 937 $ 3,939 $ 11,364 Dominion Energy $ 683 $ - $ 3,826 $ 14,013

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following table disaggregates revenue by type for each reportable segment for the three months ended June 30, 2019: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Coal sales Steam coal $ 9,749 $ 8,396 $ 8,422 $ 13,088 $ - $ 39,655 Met coal 25,437 - - - - 25,437 Other revenue 36 460 - - - 496 Total $ 35,222 $ 8,856 $ 8,422 $ 13,088 $ - $ 65,588 The following table disaggregates revenue by type for each reportable segment for the three months ended June 30, 2018: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Coal sales Steam coal $ 13,200 $ 3,904 $ 8,656 $ 13,608 $ - $ 39,368 Met coal 14,877 - - - - 14,877 Other revenue 56 517 - - 105 678 Total $ 28,133 $ 4,421 $ 8,656 $ 13,608 $ 105 $ 54,923 The following table disaggregates revenue by type for each reportable segment for the six months ended June 30, 2019: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Coal sales Steam coal $ 23,138 $ 14,461 $ 17,132 $ 26,089 $ - $ 80,820 Met coal 42,135 - - - - 42,135 Other revenue 357 1,014 - - - 1,371 Total $ 65,630 $ 15,475 $ 17,132 $ 26,089 $ - $ 124,326 The following table disaggregates revenue by type for each reportable segment for the six months ended June 30, 2018: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Coal sales Steam coal $ 24,861 $ 7,592 $ 16,716 $ 25,219 $ - $ 74,388 Met coal 34,129 - - - - 34,129 Other revenue 118 974 9 - 105 1,206 Total $ 59,108 $ 8,566 $ 16,725 $ 25,219 $ 105 $ 109,723

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Schedule of Reportable Segment Results of Operations	Reportable segment results of operations for the three months ended June 30, 2019 are as follows (Note: “DD&A” refers to depreciation, depletion and amortization): Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Total revenues $ 35,222 $ 8,856 $ 8,422 $ 13,088 $ - $ 65,588 DD&A 1,863 434 1,109 2,122 88 5,616 Interest expense - - - - 1,735 1,735 Net Income/(loss) $ 6,560 $ (692 ) $ 1,321 $ (2,760 ) $ (4,317 ) $ 112 Reportable segment results of operations for the three months ended June 30, 2018 are as follows: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Total revenues $ 28,133 $ 4,422 $ 8,656 $ 13,608 $ 104 $ 54,923 DD&A 2,263 300 1,041 1,979 94 5,677 Interest expense - - - - 1,913 1,913 Net Income/(loss) $ 997 $ (1,477 ) $ (63 ) $ (1,880 ) $ (612 ) $ (3,035 ) Reportable segment results of operations for the six months ended June 30, 2019 are as follows: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Total revenues $ 65,630 $ 15,475 $ 17,132 $ 26,089 $ - $ 124,326 DD&A 3,763 842 2,203 4,180 178 11,166 Interest expense - - - - 3,436 3,436 Net Income/(loss) $ 7,743 $ (1,814 ) $ 993 $ (6,347 ) $ (7,742 ) $ (7,167 ) Reportable segment results of operations for the six months ended June 30, 2018 are as follows: Central Appalachia Northern Appalachia Rhino Western Illinois Basin Other Total Consolidated (in thousands) Total revenues $ 59,108 $ 8,566 $ 16,725 $ 25,219 $ 105 $ 109,723 DD&A 4,459 441 2,102 3,918 184 11,104 Interest expense 1 - - - 3,797 3,798 Net Income/(loss) $ 1,927 $ (2,592 ) $ 900 $ (4,209 ) $ (1,882 ) $ (5,856 )

Basis of Presentation and Org_2

Basis of Presentation and Organization (Details Narrative)	Mar. 31, 2016
Royal Energy Resources, Inc [Member]
Ownership percentage	100.00%

Summary of Significant Accoun_3

Summary of Significant Accounting Policies and General (Details Narrative)	Jun. 30, 2019	Jun. 30, 2018
Accounting Policies [Abstract]
Debt effective interest rate	22.21%	20.79%

Prepaid Expenses and Other Cu_3

Prepaid Expenses and Other Current Assets (Details Narrative) - USD ($) $ in Thousands	Jul. 03, 2019	Mar. 31, 2019	Jun. 30, 2019	Dec. 31, 2017	Jun. 28, 2019	Dec. 31, 2018
Receivable, other			$ 7,000
Gain on partnership settlement agreement			$ 6,900
Number of shares sold, shares		104,100
Number of shares sold for net consideration		$ 2,300
Mammoth Energy Services, Inc. [Member]
Number of shares acquired				568,794
Shares owned by partnership						104,100
Settlement Agreement [Member] | Third Party [Member]
Payable to third party					$ 7,000
Settlement Agreement [Member] | Third Party [Member] | Subsequent Event [Member]
Proceeds from partnership	$ 4,200
Due from partnership	$ 2,800
Debt instrument maturity date	Feb. 29, 2020

Prepaid Expenses and Other Cu_4

Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Prepaid Expense and Other Assets, Current [Abstract]
Other prepaid expenses	$ 1,142	$ 971
Prepaid insurance	2,151	1,397
Prepaid leases	99	92
Supply inventory	306	306
Total Prepaid expenses and other assets	$ 3,698	$ 2,766

Property, Plant and Equipment -

Property, Plant and Equipment - Schedule of Property, Plant and Equipment by Major Classification (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total	$ 452,998	$ 450,888
Less accumulated depreciation, depletion and amortization	(287,855)	(277,029)
Net	165,143	173,859
Mining and Other Equipment and Related Facilities [Member]
Property, Plant and Equipment [Line Items]
Total	$ 311,197	307,300
Mining and Other Equipment and Related Facilities [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Lives	2 years
Mining and Other Equipment and Related Facilities [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Lives	20 years
Mine Development Costs [Member]
Property, Plant and Equipment [Line Items]
Total	$ 64,757	63,681
Mine Development Costs [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Lives	1 year
Mine Development Costs [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Lives	15 years
Coal Properties [Member]
Property, Plant and Equipment [Line Items]
Total	$ 63,461	63,527
Coal Properties [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Lives	1 year
Coal Properties [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Lives	15 years
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Total	$ 10,416	13,181
Construction Work in Process [Member]
Property, Plant and Equipment [Line Items]
Total	$ 3,167	$ 3,199

Property, Plant and Equipment_2

Property, Plant and Equipment - Schedule of Depreciation, Depletion and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Property, Plant and Equipment [Line Items]
Total depreciation, depletion and amortization	$ 5,616	$ 5,677	$ 11,166	$ 11,104
Mining and Other Equipment and Related Facilities [Member]
Property, Plant and Equipment [Line Items]
Total depreciation, depletion and amortization	4,216	4,244	8,380	8,331
Coal Properties [Member]
Property, Plant and Equipment [Line Items]
Total depreciation, depletion and amortization	482	481	948	953
Mine Development Costs [Member]
Property, Plant and Equipment [Line Items]
Total depreciation, depletion and amortization	843	821	1,687	1,570
Asset Retirement Costs [Member]
Property, Plant and Equipment [Line Items]
Total depreciation, depletion and amortization	$ 75	$ 131	$ 151	$ 250

Leases (Details Narrative)

Leases (Details Narrative)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases term description	The leases have remaining lease terms of 1 year to 9 years, some of which include options to extend the leases for up to 15 years.

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of use assets	$ 12,759
Operating lease liabilities-current	3,211
Operating lease liabilities-long-term	9,181
Total operating lease liabilities	12,392
Finance leases: Property. Plant and Equipment, gross	10
Finance leases: Accumulated depreciation	(2)
Finance leases: Total Property, Plant and Equipment, net	8
Finance leases - current portion	4
Finance leases - noncurrent portion	3
Total finance lease obligation	$ 7

Leases - Schedule of Weighted A

Leases - Schedule of Weighted Average Discount Rates and Lease Terms (Details)	Jun. 30, 2019
Leases [Abstract]
Weighted Average Discount Rate: Operating leases	7.00%
Weighted Average Discount Rate: Finance leases	7.00%
Weighted Average Lease Term: Operating leases term	5 years 5 months 12 days
Weighted Average Lease Term: Finance leases term	2 years 2 months 30 days

Leases - Schedule of Suppleme_2

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases		$ 1,950
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for finance leases
Cash paid for amounts included in the measurement of lease liabilities: Financing cash flows for finance leases		2
Right-of-use assets obtained in exchange for lease obligations: Operating liabilities		13,896
Right-of-use assets obtained in exchange for lease obligations: Finance liabilities		$ 10

Leases - Schedule of Maturities

Leases - Schedule of Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Operating leases: 2019 (excluding the six months ended June 30, 2019)	$ 2,011
Operating leases: 2020	3,444
Operating leases: 2021	2,561
Operating leases: 2022	1,031
Operating leases: 2023	912
Operating leases: Thereafter	2,878
Operating leases: Total lease payments	12,837
Operating Leases Less: Imputed interest	445
Operating leases: Total	12,392
Finance Leases: 2019 (excluding the six months ended June 30, 2019)	3
Finance Leases: 2020	4
Finance Leases: 2021
Finance Leases: 2022
Finance Leases: 2023
Finance Leases: Thereafter
Finance Leases: Total lease payments	7
Finance Leases Less: Imputed interest
Finance Leases: Total	$ 7

Leases - Schedule of Components

Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating Lease Cost	$ 983	$ 1,966
Finance lease cost: Amortization of right-of-use assets	1	2
Finance lease cost: Interest on lease liabilities
Total finance lease cost	$ 1	$ 2

Other Non-Current Assets (Detai

Other Non-Current Assets (Details Narrative) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Other Assets, Noncurrent Disclosure [Abstract]
Non-current receivable	$ 24,192	$ 24,192
Workers' compensation benefits liability, noncurrent	$ 24,200	$ 24,200

Other Non-Current Assets - Sche

Other Non-Current Assets - Schedule of Other Non-Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Other Assets, Noncurrent Disclosure [Abstract]
Deposits and other	$ 864	$ 1,144
Due (to) Rhino GP	(77)	(84)
Non-current receivable	24,192	24,192
Deferred expenses	144	158
Total	$ 25,123	$ 25,410

Accrued Expenses and Other Cu_3

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Payroll, bonus and vacation expense	$ 2,595	$ 2,151
Non-income taxes	3,066	2,168
Royalty expenses	2,230	1,669
Accrued interest	53	35
Health claims	857	868
Workers' compensation & pneumoconiosis	1,900	1,900
Other	1,293	1,316
Total	$ 11,994	$ 10,107

Debt (Details Narrative)

Debt (Details Narrative) - USD ($) $ in Thousands	May 13, 2019	May 08, 2019	Feb. 14, 2019	Oct. 26, 2018	Apr. 17, 2018	Dec. 27, 2017	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Line of Credit Facility [Line Items]
Accrued preferred distributions								$ 600		$ 3,210
Proceeds from sale of real property								$ 1,635	$ 4,014
Financing Agreement [Member]
Line of Credit Facility [Line Items]
Debt due date										Dec. 27, 2020
Debt instruments interest terms								Loans made pursuant to the Financing Agreement are, at the Operating Company's option, either "Reference Rate Loans" or "LIBOR Rate Loans." Reference Rate Loans bear interest at the greatest of (a) 4.25% per annum, (b) the Federal Funds Rate plus 0.50% per annum, (c) the LIBOR Rate (calculated on a one-month basis) plus 1.00% per annum or (d) the Prime Rate (as published in the Wall Street Journal) or if no such rate is published, the interest rate published by the Federal Reserve Board as the "bank prime loan" rate or similar rate quoted therein, in each case, plus an applicable margin of 9.00% per annum (or 12.00% per annum if the Operating Company has elected to capitalize an interest payment pursuant to the PIK Option, as described below). LIBOR Rate Loans bear interest at the greater of (x) the LIBOR for such interest period divided by 100% minus the maximum percentage prescribed by the Federal Reserve for determining the reserve requirements in effect with respect to eurocurrency liabilities for any Lender, if any, and (y) 1.00%, in each case, plus 10.00% per annum (or 13.00% per annum if the Borrowers have elected to capitalize an interest payment pursuant to the PIK Option). Interest payments are due on a monthly basis for Reference Rate Loans and one-, two- or three-month periods, at the Operating Company's option, for LIBOR Rate Loans. If there is no event of default occurring or continuing, the Operating Company may elect to defer payment on interest accruing at 6.00% per annum by capitalizing and adding such interest payment to the principal amount of the applicable term loan (the "PIK Option").
Loan payable on quarterly basis										$ 375
Debt instrument description										Borrowers must make certain prepayments over the term of any loans outstanding, including: (i) the payment of 25% of Excess Cash Flow (as that term is defined in the Financing Agreement) of the Partnership and its subsidiaries for each fiscal year, commencing with respect to the year ending December 31, 2019, (ii) subject to certain exceptions, the payment of 100% of the net cash proceeds from the dispositions of certain assets, the incurrence of certain indebtedness or receipts of cash outside of the ordinary course of business, and (iii) the payment of the excess of the outstanding principal amount of term loans outstanding over the amount of the Collateral Coverage Amount (as that term is defined in the Financing Agreement). In addition, the Lenders are entitled to (i) certain fees, including 1.50% per annum of the unused Delayed Draw Term Loan Commitment for as long as such commitment exists, (ii) for the 12-month period following the execution of the Financing Agreement, a make-whole amount equal to the interest and unused Delayed Draw Term Loan Commitment fees that would have been payable but for the occurrence of certain events, including among others, bankruptcy proceedings or the termination of the Financing Agreement by the Operating Company, and (iii) audit and collateral monitoring fees and origination and exit fees.
Debt covenant description									Fixed Charge Coverage Ratio of the Partnership and its subsidiaries to be less than 1.20 to 1.00
Proceeds from sale of real property										$ 379
One time cash distribution not exceed amount			$ 3,200
Amendment fee amount	$ 600
Exit fee percentage	1.00%
Exit fee percentage, description		The original exit fee of 3% was included in the Financing Agreement at the execution date and the increase of the total exit fee to 6% was included as part of the amendment dated February 13, 2019 discussed above and this Third Amendment.
Partnership borrowed amount								$ 28,300
Short term variable interest rate								12.41%
Financing Agreement [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Exit fee percentage		3.00%
Financing Agreement [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Exit fee percentage		6.00%
Financing Agreement [Member] | LIBOR Plus [Member]
Line of Credit Facility [Line Items]
Short term variable interest rate								10.00%
Financing Agreement [Member] | Lenders [Member]
Line of Credit Facility [Line Items]
Repayments of loan				$ 5,000
Financing Agreement [Member] | Series A Preferred Units [Member]
Line of Credit Facility [Line Items]
Accrued preferred distributions											$ 6,000
Financing Agreement [Member] | Effective Date Term Loan Commitment [Member]
Line of Credit Facility [Line Items]
Debt instrument principal amount						$ 40,000
Financing Agreement [Member] | Delayed Draw Term Loan Commitment [Member]
Line of Credit Facility [Line Items]
Debt instrument principal amount						35,000
Financing Agreement [Member] | Cortland Capital Market Services LLC [Member]
Line of Credit Facility [Line Items]
Debt instrument principal amount						$ 80,000
Debt due date						Dec. 27, 2020
Financing Agreement [Member] | Mammoth Inc. [Member]
Line of Credit Facility [Line Items]
Proceed from sale of shares									$ 5,000
Percentage of additional shares sold, description					Additionally, the amendments provided that the Partnership could sell additional shares of Mammoth Inc. stock and retain 50% of the proceeds with the other 50% used to reduce debt.
Proceeds from sale of stock reduced of outstanding debt							$ 3,400

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Note payable -Financing Agreement	$ 28,298	$ 29,048
Note payable-other debt	1,772	522
Finance lease obligation	7
Net unamortized debt issuance costs	(3,704)	(4,095)
Net unamortized original issue discount	(632)	(843)
Total	25,741	24,632
Less current portion	(5,036)	(2,174)
Long-term debt	$ 20,705	$ 22,458

Asset Retirement Obligations -

Asset Retirement Obligations - Schedule of Asset Retirement Obligations (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Asset Retirement Obligation Disclosure [Abstract]
Balance at beginning of period (including current portion)	$ 18,549	$ 18,662	$ 18,662
Accretion expense	638	$ 639	1,269
Adjustments to the liability from annual recosting and other			(1,083)
Liabilities settled	(76)		(299)
Balance at end of period	19,111		18,549
Less current portion of asset retirement obligation	(465)		(465)
Long-term portion of asset retirement obligation	$ 18,646		$ 18,084

Employee Benefits - Schedule of

Employee Benefits - Schedule of Expense Under Defined Contribution Savings Plan (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Retirement Benefits [Abstract]
401(k) plan expense	$ 470	$ 393	$ 959	$ 829

Partners' Capital (Details Narr

Partners' Capital (Details Narrative) $ / shares in Units, $ in Thousands	Sep. 01, 2017USD ($)Number$ / sharesshares	Dec. 30, 2016USD ($)Number$ / shares	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)$ / sharesshares	Mar. 31, 2019$ / shares
Fourth Quarter of 2018 [Member] | Mammoth Inc. [Member]
Reclassification from Other Comprehensive Income			$ 4,200
Series A Preferred Units [Member]
Partnership paid for distributions earned			600
Series A Preferred Units [Member] | First Quarter of 2019 [Member]
Partnership paid for distributions earned				$ 3,200
Series A Preferred Units [Member] | First Quarter of 2018 [Member]
Partnership paid for distributions earned					$ 6,000
Series A Preferred Units [Member] | Minimum [Member]
Debt conversion price per share | $ / shares		$ 2
Series A Preferred Units [Member] | Maximum [Member]
Debt conversion price per share | $ / shares		$ 10
Royal Common Stock [Member]
Weighted average closing price, conversion percent	75.00%
Weighted average closing price, conversion trading days | Number	90
Debt conversion price per share | $ / shares	$ 4.51
Conversion of debt	$ 4,100
Common stock issued for conversion | shares	914,797
Royal Common Stock [Member] | Minimum [Member]
Debt conversion price per share | $ / shares	$ 3.50
Royal Common Stock [Member] | Maximum [Member]
Debt conversion price per share | $ / shares	$ 7.50
Fourth Amended and Restated Agreement [Member] | Series A Preferred Units [Member]
Units of partnership interest, description		(i) 50% of the CAM Mining free cash flow (as defined below) and (ii) an amount equal to the number of outstanding Series A preferred units multiplied by $0.80. "CAM Mining free cash flow" is defined in the Amended and Restated Partnership Agreement as (i) the total revenue of the Partnership's Central Appalachia business segment, minus (ii) the cost of operations (exclusive of depreciation, depletion and amortization) for the Partnership's Central Appalachia business segment, minus (iii) an amount equal to $6.50, multiplied by the aggregate number of coal tons sold by the Partnership from its Central Appalachia business segment.
Indebtedness		$ 50,000
Unpaid distribution | $ / shares		$ 10
Weighted average closing price, conversion percent		75.00%
Weighted average closing price, conversion trading days | Number		90
Common Unit Warrants [Member] | Warrant Agreement [Member]
Number of warrant issuance shares | shares					683,888
Warrant exercise price per share | $ / shares					$ 1.95
Warrant expiration term					5 years
Common Unit Warrants [Member] | Financing Agreement [Member]
Proceeds from warrants					$ 40,000
Fair value of warrants					$ 1,300
Partnership's Common Units [Member]
Partnership accumulated arrearages			$ 790,200
Partnership's Common Units [Member] | Minimum [Member]
Unpaid distribution | $ / shares						$ 4.45

Earnings Per Unit ('EPU') (Deta

Earnings Per Unit ('EPU') (Details Narrative) - shares	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Unit [Abstract]
Potential antidilutive common units warrants	683,888	683,888

Earnings Per Unit ('EPU') - Sch

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, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Unit [Line Items]
Net (loss)/income	$ 112	$ (7,279)	$ (3,035)	$ (2,821)	$ (7,167)	$ (5,856)
General Partner's [Member]
Earnings Per Unit [Line Items]
Net (loss)/income	(1)		(14)		(32)	(27)
Common Unitholders' [Member]
Earnings Per Unit [Line Items]
Net (loss)/income	$ (172)		$ (3,061)		$ (7,114)	$ (5,917)
Denominator: Weighted average units used to compute basic EPU	13,098,000		13,055,000		13,098,000	13,009,000
Denominator: Weighted average units used to compute diluted EPU	13,098,000		13,055,000		13,098,000	13,009,000
Net (loss)/income per limited partner unit, basic:	$ (0.01)		$ (0.23)		$ (0.54)	$ (0.45)
Net (loss)/income per limited partner unit, diluted	$ (0.01)		$ (0.23)		$ (0.54)	$ (0.45)
Subordinated Unitholders' [Member]
Earnings Per Unit [Line Items]
Net (loss)/income	$ (15)		$ (269)		$ (621)	$ (521)
Denominator: Weighted average units used to compute basic EPU	1,143,000		1,146,000		1,144,000	1,146,000
Denominator: Weighted average units used to compute diluted EPU	1,143,000		1,146,000		1,144,000	1,146,000
Net (loss)/income per limited partner unit, basic:	$ (0.01)		$ (0.23)		$ (0.54)	$ (0.45)
Net (loss)/income per limited partner unit, diluted	$ (0.01)		$ (0.23)		$ (0.54)	$ (0.45)
Preferred Unitholders' [Member]
Earnings Per Unit [Line Items]
Net (loss)/income	$ 300		$ 309		$ 600	$ 609
Denominator: Weighted average units used to compute basic EPU	1,500,000		1,500,000		1,500,000	1,500,000
Denominator: Weighted average units used to compute diluted EPU	1,500,000		1,500,000		1,500,000	1,500,000
Net (loss)/income per limited partner unit, basic:	$ 0.20		$ 0.21		$ 0.40	$ 0.41
Net (loss)/income per limited partner unit, diluted	$ 0.20		$ 0.21		$ 0.40	$ 0.41

Commitments and Contingencies_2

Commitments and Contingencies (Details Narrative) $ in Thousands	Jun. 30, 2019USD ($)
Letter of credit, outstanding	$ 0
Cash collateral on deposit	3,000
Deane Mining, LLC [Member]
Letter of credit, outstanding	400
Sands Hill Mining, LLC [Member]
Letter of credit, outstanding	3,400
Third Parties [Member]
Letter of credit, outstanding	$ 39,200

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Delivery Commitments (Details)	6 Months Ended
	Jun. 30, 2019NumberT
Commitments and Contingencies Disclosure [Abstract]
Tons, 2019 Q3-Q4 | T	2,192,000
Tons, 2020 | T	2,180,000
Tons, 2021 | T	920,000
Number of customers, 2019 Q3-Q4 | Number	18
Number of customers, 2020 | Number	7
Number of customers, 2021 | Number	3

Commitments and Contingencies_3

Commitments and Contingencies - Schedule of Lease and Royalty Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Lease expense	$ 1,302	$ 976	$ 2,556	$ 1,406
Royalty expense	$ 4,289	$ 3,467	$ 8,182	$ 7,111

Major Customers - Summary of Ma

Major Customers - Summary of Major Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Revenue, Major Customer [Line Items]
Receivable balance	$ 22,595		$ 22,595		$ 15,126
Sales	65,588	$ 54,923	124,326	$ 109,723
Javelin Global [Member]
Revenue, Major Customer [Line Items]
Receivable balance	3,816		3,816		4,347
Sales			24,527	16,554
Integrity Coal [Member]
Revenue, Major Customer [Line Items]
Receivable balance					937
Sales			3,939	11,364
Dominion Energy [Member]
Revenue, Major Customer [Line Items]
Receivable balance	$ 683		683
Sales			$ 3,826	$ 14,013

Revenue (Details Narrative)

Revenue (Details Narrative)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Sales Revenue, Net [Member]
Partnership total revenue, percentage	99.00%	99.00%	99.00%	99.00%
Other Revenue [Member]
Partnership total revenue, percentage	1.00%	1.00%	1.00%	1.00%

Revenue - Schedule of Disaggreg

Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Total	$ 65,588	$ 54,923	$ 124,326	$ 109,723
Steam Coal Revenue [Member]
Total	39,655	39,368	80,820	74,388
Met Coal Revenue [Member]
Total	25,437	14,877	42,135	34,129
Other Revenue [Member]
Total	496	678	1,371	1,206
Central Appalachia [Member]
Total	35,222	28,133	65,630	59,108
Central Appalachia [Member] | Steam Coal Revenue [Member]
Total	9,749	13,200	23,138	24,861
Central Appalachia [Member] | Met Coal Revenue [Member]
Total	25,437	14,877	42,135	34,129
Central Appalachia [Member] | Other Revenue [Member]
Total	36	56	357	118
Northern Appalachia [Member]
Total	8,856	4,421	15,475	8,566
Northern Appalachia [Member] | Steam Coal Revenue [Member]
Total	8,396	3,904	14,461	7,592
Northern Appalachia [Member] | Met Coal Revenue [Member]
Total
Northern Appalachia [Member] | Other Revenue [Member]
Total	460	517	1,014	974
Rhino Western [Member]
Total	8,422	8,656	17,132	16,725
Rhino Western [Member] | Steam Coal Revenue [Member]
Total	8,422	8,656	17,132	16,716
Rhino Western [Member] | Met Coal Revenue [Member]
Total
Rhino Western [Member] | Other Revenue [Member]
Total				9
Illinois Basin [Member]
Total	13,088	13,608	26,089	25,219
Illinois Basin [Member] | Steam Coal Revenue [Member]
Total	13,088	13,608	26,089	25,219
Illinois Basin [Member] | Met Coal Revenue [Member]
Total
Illinois Basin [Member] | Other Revenue [Member]
Total
Other [Member]
Total		105		105
Other [Member] | Steam Coal Revenue [Member]
Total
Other [Member] | Met Coal Revenue [Member]
Total
Other [Member] | Other Revenue [Member]
Total		$ 105		$ 105

Fair Value Measurements (Detail

Fair Value Measurements (Details Narrative) - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Number of shares sold, shares	104,100
Mammoth Inc. [Member] | First Quarter of 2019 [Member]
Number of shares sold, shares		104,100

Supplemental Disclosures of C_2

Supplemental Disclosures of Cash Flow Information (Details Narrative) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Other Significant Noncash Transactions [Line Items]
Interest paid	$ 2,200	$ 2,800
Accounts Payable [Member]
Other Significant Noncash Transactions [Line Items]
Additions to property, plant, and equipment	$ 2,300	$ 1,600

Segment Information (Details Na

Segment Information (Details Narrative)	6 Months Ended
	Jun. 30, 2019Segments
Segment Reporting [Abstract]
Number of reportable business segments	4

Segment Information - Schedule

Segment Information - Schedule of Reportable Segment Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total revenues	$ 65,588		$ 54,923		$ 124,326	$ 109,723
DD&A	5,616		5,677		11,166	11,104
Interest expense	1,735		1,913		3,436	3,798
Net (loss)/income	112	$ (7,279)	(3,035)	$ (2,821)	(7,167)	(5,856)
Central Appalachia [Member]
Segment Reporting Information [Line Items]
Total revenues	35,222		28,133		65,630	59,108
DD&A	1,863		2,263		3,763	4,459
Interest expense						1
Net (loss)/income	6,560		997		7,743	1,927
Northern Appalachia [Member]
Segment Reporting Information [Line Items]
Total revenues	8,856		4,422		15,475	8,566
DD&A	434		300		842	441
Interest expense
Net (loss)/income	(692)		(1,477)		(1,814)	(2,592)
Rhino Western [Member]
Segment Reporting Information [Line Items]
Total revenues	8,422		8,656		17,132	16,725
DD&A	1,109		1,041		2,203	2,102
Interest expense
Net (loss)/income	1,321		(63)		993	900
Illinois Basin [Member]
Segment Reporting Information [Line Items]
Total revenues	13,088		13,608		26,089	25,219
DD&A	2,122		1,979		4,180	3,918
Interest expense
Net (loss)/income	(2,760)		(1,880)		(6,347)	(4,209)
Segment Other [Member]
Segment Reporting Information [Line Items]
Total revenues			104			105
DD&A	88		94		178	184
Interest expense	1,735		1,913		3,436	3,797
Net (loss)/income	$ (4,317)		$ (612)		$ (7,742)	$ (1,882)

Subsequent Events (Details Narr

Subsequent Events (Details Narrative) $ in Thousands	Jul. 09, 2019USD ($)
Subsequent Event [Member] | Surety Bond Obligations [Member] | Third Party [Member]
Payable to third party	$ 2,000