Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue
Coal sales	$ 58,798,130	$ 2,166,806
Coal processing	2,237,674	3,048,853
Total revenue	61,035,804	5,215,659
Cost and expenses
Cost of coal sales (exclusive of items shown separately below)	58,308,259	1,795,845
Cost of coal processing (exclusive of items shown separately below)	2,212,403	2,600,874
Other operating costs and expenses	257,721	416,292	934,154
Asset retirement obligation accretion	405,106	229,304	74,516
Depreciation and amortization	3,154,072	251,684
Professional fees	1,377,053	4,325,503	406,152
Selling, general and administrative	11,214,056	3,125,941	918,269
Total cost and expenses	76,928,670	12,745,443	2,333,091
Operating loss	(15,892,866)	(7,529,784)	(2,333,091)
Interest and dividend income	295,185	138,752
Other income	203,973
Interest expense	(22,841)	(124,117)	(1,922)
Net loss	$ (15,416,549)	$ (7,515,149)	$ (2,335,013)
Pro forma basic and diluted loss per share (in dollars per share)	$ (0.41)