Note 9 - Earnings (Loss) Per Share - Schedule of Pro Forma Information (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net loss		$ (6,235,543)	$ (1,532,698)	$ (12,816,658)	$ (5,980,062)
Interest expense on note payable to Ramaco Coal, LLC (1)	[1]		15,900	21,855	15,900
Basic net loss attributable to common shareholders	[2]	(6,235,543)	(1,516,798)	(12,794,803)	(5,964,162)
Effect of dilutive securities (2)	[3]
Diluted net loss attributable to common shareholders		$ (6,235,543)	$ (1,516,798)	$ (12,794,803)	$ (5,964,162)
Weighted average shares outstanding, diluted (in shares)		39,509,311	22,498,150	36,912,362	22,498,150
Net loss per common share, diluted (in dollars per share)		$ (0.16)	$ (0.07)	$ (0.35)	$ (0.27)

[1] Adjustment has been made to the pro forma loss to addback interest expense associated with the note payable to Ramaco Carbon, LLC which was repaid in full using proceeds from the IPO.

[2] Weighted average number of shares outstanding during the quarter and during the nine-months ended September 30, 2017.

[3] Excludes 937,424 shares issuable upon the exercise of outstanding options held by certain of our executive management because their effect would be antidilutive