Parent Company Financial Statements - Schedule of Parent Company Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands | Mar. 22, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Dec. 31, 2016 |
Cash and cash equivalents | | $ 1,903 | | $ 86 | | $ 1,903 | $ 86 |
Prepaid expenses and other | | | | | | 4,764 | 4,929 |
Total current assets | | | | | | 48,228 | 31,388 |
At cost, including coal properties, mine development and construction costs | | | | | | 244,079 | 69,684 |
Less accumulated depreciation, depletion and amortization | | | | | | (34,076) | (4,572) |
Net property, plant and equipment | | | | | | 210,003 | 65,112 |
Investment in Rhino | | | | | | 130 | 5,121 |
Intangible assets, less accumulated amortization of $85 and $68, respectively | | | | | | | 34 |
TOTAL | | | | | | 315,454 | 166,242 |
Accounts payable | | | | | | 12,888 | 10,447 |
Accrued expenses and other | | | | | | 15,763 | 11,405 |
Notes payable-Related party | | | | | | 504 | 504 |
Related party advances and accrued interest payable | | | | | | 78 | 71 |
Total current liabilities | | | | | | 42,440 | 35,384 |
Long-term debt | | | | | | 2,500 | |
Total non-current liabilities | | | | | | 106,591 | 65,576 |
Total liabilities | | | | | | 149,031 | 100,960 |
Common stock: $0.00001 par value; authorized 25,000,000 shares; 17,184,095 shares issued and outstanding at June 30, 2017 and authorized 500,000,000; 17,212,278 shares issued and outstanding at December 31, 2016. | | | | | | 1 | 1 |
Additional paid-in capital | | | | | | 47,715 | 47,295 |
Stock subscription receivable | | | | | | | (213) |
Accumulated other comprehensive income | | | | | | 1,978 | 874 |
Accumulated earnings (accumulated deficit) | | | | | | 87,183 | (20,579) |
Total stockholders' equity owned by common shareholders | | | | | | 166,423 | 65,282 |
Total non-controlling interest | | | | | | 29,546 | 37,904 |
Total stockholders' equity | | | | | | 136,877 | 27,378 |
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY | | | | | | 315,454 | 166,242 |
Total revenues | | 56,535 | $ 41,613 | 110,085 | $ 47,772 | | |
Amortization | | 6,978 | 1,319 | 30,117 | 1,377 | | |
Selling, general and administrative (Amortization shown separately above) | | 3,277 | 4,505 | 6,671 | 6,779 | | |
(Gain) on sale/disposal of assets-net | | (71) | | (70) | | | |
Total costs and expenses | | 57,146 | 39,701 | 129,377 | 46,159 | | |
(LOSS)/INCOME FROM OPERATIONS | | (611) | 1,912 | (19,292) | 1,613 | | |
Interest income Other | | | (31) | | (37) | | |
Interest income Related party | | | 2 | | 3 | | |
Interest expense Other | | (1,012) | (1,759) | (2,228) | (2,094) | | |
Interest expense Related party | | (3) | (3) | (6) | (6) | | |
Gain on bargain purchase | | | | (171,151) | | | |
Equity in net (loss)/income from Rhino | | (40) | 26 | (36) | 65 | | |
Total interest and other (expense)/income | | (975) | (1,755) | 168,953 | (2,125) | | |
NET (LOSS)/INCOME FROM OPERATIONS BEFORE INCOME TAXES | | (1,586) | 157 | 149,661 | (512) | | |
INCOME TAXES | | | | 44,031 | | | |
NET (LOSS)/INCOME FROM OPERATIONS | | (1,586) | 157 | 105,630 | (512) | | |
NET (LOSS/ INCOME BEFORE NON-CONTROLLING INTEREST | | (1,586) | 577 | 105,630 | 827 | | |
Less net (loss)/income attributable to non-controlling interest | | (452) | 84 | (9,273) | 121 | | |
NET (LOSS)/INCOME ATTRIBUTABLE TO COMPANY'S STOCKHOLDERS | | $ (1,134) | $ 493 | $ 114,903 | $ 706 | | |
Net (loss)/income per share, basic and diluted | | $ (0.07) | $ 0.03 | $ 6.68 | $ 0.05 | | |
Weighted average shares outstanding, basic and diluted | | 17,207,883 | 16,699,036 | 17,203,109 | 15,624,438 | | |
Depreciation, depletion and amortization | | $ 6,978 | $ 1,319 | $ 30,117 | $ 1,703 | | |
Accrued interest income - related party | | | | | (3) | | |
Accrued interest expense - related party | | | | | 6 | | |
Equity in net loss/(income) of consolidated affiliates | | | | 36 | (26) | | |
Prepaid expenses and other assets | | | | (1,378) | (1,605) | | |
Accounts payable | | | | 2,229 | 2,223 | | |
Accrued expenses and other liabilities | | | | 3,470 | 1,420 | | |
Net cash used in operating activities | | | | 6,542 | 2,693 | | |
Investment in Rhino Resource Partners, LP | | | | | (4,500) | | |
Investment in Blaze Mining royalty | $ (21,113) | | | | (200) | | |
Sale of Rhino preferred and common units | | | | 2,300 | | | |
Cash acquired in acquisitions | | | | | 969 | | |
Net cash used in investing activities | | | | (7,018) | (5,586) | | |
Proceeds from related party loans | | | | 85 | | | |
Proceeds from issuance of common stock | | | | 120 | 900 | | |
Net cash provided by financing activities | | | | 2,293 | (3,904) | | |
CASH AND CASH EQUIVALENTS-Beginning of period | | | | 86 | | | |
CASH AND CASH EQUIVALENTS-End of period | | 1,903 | | 1,903 | | | |
Parent Company [Member] | | | | | | | |
Cash and cash equivalents | | 1,866 | 292 | 1,866 | 292 | 1,866 | 39 |
Prepaid expenses and other | | | | | | 424 | 54 |
Total current assets | | | | | | 2,290 | 93 |
At cost, including coal properties, mine development and construction costs | | | | | | 11,432 | 11,432 |
Less accumulated depreciation, depletion and amortization | | | | | | | |
Net property, plant and equipment | | | | | | 11,432 | 11,432 |
Investment in Rhino | | | | | | 204,622 | 61,136 |
Intangible assets, less accumulated amortization of $85 and $68, respectively | | | | | | | 34 |
TOTAL | | | | | | 218,344 | 72,695 |
Accounts payable | | | | | | 34 | 29 |
Accrued expenses and other | | | | | | 734 | 769 |
Notes payable-Related party | | | | | | 504 | 2,504 |
Note payable-Rhino | | | | | | 4,040 | 4,040 |
Related party advances and accrued interest payable | | | | | | 78 | 71 |
Total current liabilities | | | | | | 5,390 | 7,413 |
Deferred tax liability | | | | | | 44,031 | |
Long-term debt | | | | | | 2,500 | |
Total non-current liabilities | | | | | | 46,531 | |
Total liabilities | | | | | | 51,921 | 7,413 |
Preferred stock: $0.00001 par value; authorized 5,000,000 shares; 51,000 issued and outstanding at June 30, 2017 and authorized 10,000,000 shares; 51,000 issued and outstanding at December 31, 2016 | | | | | | | |
Common stock: $0.00001 par value; authorized 25,000,000 shares; 17,184,095 shares issued and outstanding at June 30, 2017 and authorized 500,000,000; 17,212,278 shares issued and outstanding at December 31, 2016. | | | | | | 1 | 1 |
Additional paid-in capital | | | | | | 47,715 | 47,295 |
Stock subscription receivable | | | | | | | (213) |
Accumulated other comprehensive income | | | | | | 1,978 | 874 |
Accumulated earnings (accumulated deficit) | | | | | | 88,098 | (20,579) |
Total stockholders' equity owned by common shareholders | | | | | | 137,792 | 27,378 |
Total non-controlling interest | | | | | | 28,631 | 37,904 |
Total stockholders' equity | | | | | | 166,423 | 65,282 |
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY | | | | | | $ 218,344 | $ 72,695 |
Revenues | | | | | | | |
Total revenues | | | | | | | |
Amortization | | 17 | 17 | 34 | 34 | | |
Selling, general and administrative (Amortization shown separately above) | | 545 | 625 | 887 | 1,051 | | |
(Gain) on sale/disposal of assets-net | | | | | | | |
Total costs and expenses | | 562 | 642 | 921 | 1,085 | | |
(LOSS)/INCOME FROM OPERATIONS | | (562) | (642) | (921) | (1,085) | | |
Interest income Other | | | | | 1 | | |
Interest income Related party | | | 2 | | 3 | | |
Interest expense Other | | (29) | (39) | (58) | (39) | | |
Interest expense Related party | | (3) | (3) | (6) | (6) | | |
Gain on bargain purchase | | | | 171,151 | | | |
Equity in net (loss)/income from Rhino | | (992) | 1,259 | (20,505) | 1,953 | | |
Total interest and other (expense)/income | | (1,024) | 1,219 | 150,582 | 1,912 | | |
NET (LOSS)/INCOME FROM OPERATIONS BEFORE INCOME TAXES | | (1,586) | 577 | 149,661 | 827 | | |
INCOME TAXES | | | | 44,031 | | | |
NET (LOSS)/INCOME FROM OPERATIONS | | (1,586) | 577 | 105,630 | 827 | | |
NET (LOSS/ INCOME BEFORE NON-CONTROLLING INTEREST | | (1,586) | 577 | 105,630 | 827 | | |
Less net (loss)/income attributable to non-controlling interest | | (452) | 84 | (9,273) | 121 | | |
NET (LOSS)/INCOME ATTRIBUTABLE TO COMPANY'S STOCKHOLDERS | | $ (1,134) | $ 493 | $ 114,903 | $ 706 | | |
Net (loss)/income per share, basic and diluted | | $ (0.07) | $ 0.03 | $ 6.68 | $ 0.05 | | |
Weighted average shares outstanding, basic and diluted | | 17,207,883 | 16,699,036 | 17,203,109 | 15,624,438 | | |
Depreciation, depletion and amortization | | | | $ 34 | $ 34 | | |
Bargain purchase gain | | | | (171,151) | | | |
Equity in net loss of Rhino | | | | 20,505 | (1,953) | | |
Value of common shares issued for services: | | | | | 283 | | |
Accrued interest income - related party | | | | | (3) | | |
Accrued interest expense - related party | | | | 6 | 6 | | |
Equity in net loss/(income) of consolidated affiliates | | | | 37 | 15 | | |
Prepaid expenses and other assets | | | | (20) | 36 | | |
Accounts payable | | | | 2 | (24) | | |
Accrued expenses and other liabilities | | | | (30) | 282 | | |
Net cash used in operating activities | | | | (956) | (497) | | |
Investment in Rhino Resource Partners, LP | | | | | (4,500) | | |
Investment in Blaze Mining royalty | | | | | (200) | | |
Sale of Rhino preferred and common units | | | | 2,300 | | | |
Cash acquired in acquisitions | | | | | 350 | | |
Net cash used in investing activities | | | | 2,300 | (4,365) | | |
Proceeds from related party loans | | | | 85 | | | |
Repayments on related party loans | | | | (2,085) | (5,000) | | |
Proceeds from issuance of common stock | | | | 120 | 900 | | |
Proceeds from issuance of convertible notes | | | | | 2,150 | | |
Net proceeds from note payable | | | | 2,150 | | | |
Net cash provided by financing activities | | | | 270 | (1,950) | | |
NET (DECREASE) IN CASH AND CASH EQUIVALENTS | | | | 1,827 | (6,812) | | |
CASH AND CASH EQUIVALENTS-Beginning of period | | | | 39 | 7,104 | | |
CASH AND CASH EQUIVALENTS-End of period | | $ 1,866 | $ 292 | $ 1,866 | $ 292 | | |