Note 8 - Notes Payable (Details Textual) - USD ($) |
12 Months Ended | ||||||
---|---|---|---|---|---|---|---|
Dec. 30, 2016 |
Aug. 31, 2016 |
Jul. 21, 2016 |
Jun. 09, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
Proceeds from Notes Payable - Related Party | $ 4,000,000 | ||||||
Notes Payable 1 [Member] | |||||||
Debt Instrument, Interest Rate, Stated Percentage | 6.00% | 6.00% | |||||
Proceeds from Notes Payable - Related Party | $ 2,800,000 | ||||||
Notes Payable 2 [Member] | |||||||
Proceeds from Notes Payable - Related Party | $ 1,200,000 | ||||||
Mid-Vol Coal Sales Inc. [Member] | |||||||
Proceeds from Notes Payable | $ 500,000 | ||||||
Amount Due to Ramaco Carbon, LLC converted to the Note Payables Amount for Ramaco Carbon, LLC [Member] | |||||||
Debt Conversion, Converted Instrument, Amount | $ 10,600,000 |