Note 11 - Related Party Transactions (Details Textual) - USD ($) |
12 Months Ended | ||
---|---|---|---|
Aug. 20, 2015 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Payment of Minimum Royaltyies | $ 792,000 | ||
Ramaco Carbon, LLC [Member] | |||
Operating Lease Semi-Annual Rent | $ 37,500 | ||
Payments for Rent | $ 19,000 | $ 93,750 |