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Partners' Capital (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended	6 Months Ended	12 Months Ended	33 Months Ended
	Apr. 12, 2018	Jan. 19, 2018	Sep. 02, 2017	Dec. 30, 2016	Mar. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Mar. 31, 2018
Mammoth Energy Services, Inc. [Member]
Number of shares sold	232,347	232,347
Cash consideration received from sale of stock	$ 7,100	$ 4,800
Reduction in debt with proceeds from sale of stock	3,400
Gain on sale of partnership capital	3,600	2,900
Other comprehensive income	$ 4,000	$ 2,600
Fair value of market adjustments						$ 4,400	$ 2,600
Shares owned by partnership						104,100
Series A Preferred Units [Member]
Partnership paid for distributions earned					$ 6,000
Partnership accrued						$ 600
Series A Preferred Units [Member] \| Minimum [Member]
Debt conversion price per share				$ 2.00
Series A Preferred Units [Member] \| Maximum [Member]
Debt conversion price per share				$ 10.00
Royal Common Stock [Member]
Weighted average closing price			75.00%
Debt conversion price per share			$ 4.51
Conversion of debt			$ 4,100
Common stock issued for conversion			914,797
Royal Common Stock [Member] \| Minimum [Member]
Debt conversion price per share			$ 3.50
Royal Common Stock [Member] \| Maximum [Member]
Debt conversion price per share			$ 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. â€œCAM Mining free cash flowâ€ is defined in the Amended and Restated Partnership Agreement as (i) the total revenue of the Partnershipâ€™s Central Appalachia business segment, minus (ii) the cost of operations (exclusive of depreciation, depletion and amortization) for the Partnershipâ€™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				$ 10.00
Weighted average closing price				75.00%
Common Unit Warrants [Member]
Number of warrant issuance shares							683,888
Warrant exercise price per share							$ 1.95
Warrant expiration term							5 years
Common Unit Warrants [Member] \| Warrant Agreement [Member]
Proceeds from warrant							$ 40,000
Fair value of warrants							$ 1,300
Partnership's Common Units [Member]
Partnership accumulated arrearages					$ 556,000			$ 556,000
Partnership's Common Units [Member] \| Minimum [Member]
Unpaid distribution								$ 4.45