Note 4 - Debt	9 Months Ended
Sep. 30, 2018
Notes to Financial Statements
Debt Disclosure [Text Block]	NOTE 4 — DEBT In February 2018, we borrowed $6.0 million under a short-term note from an unrelated third -party lender in order to manage accounts receivable. The note is secured by a portion of our mobile mining equipment (the “Equipment Note”). Interest accrues monthly at 8.5% or 30 -day LIBOR plus 6.9%, whichever is greater. The outstanding principal balance is due on December 31, 2018 but may be prepaid without penalty at any time. Issuance costs incurred with the Equipment Note totaled $0.3 million and are deferred and amortized over the initial term of the debt using the interest method. Debt issuance costs are presented in the condensed consolidated balance sheet as a direct deduction from the carrying amount of the liability. During the nine months ended September 30, 2018, we repaid $1 million under this note. As of September 30, 2018, the outstanding principal balance and carrying balance was $5.0 million. In May 2018, we borrowed $3.0 million from Ramaco Coal, LLC, a related party, also to manage accounts receivable. Interest accrues monthly at 10.0%. The outstanding principal balance is due on December 15, 2018 but may be prepaid without penalty at any time. As of September 30, 2018, the outstanding principal balance and carrying amount was $3.0 million. In June 2018, we borrowed an additional $7.0 million under a short-term note from the same unrelated equipment lender in order to manage accounts receivable (the “Additional Equipment Note”). The Additional Equipment Note is also secured by the same mobile mining equipment as the Equipment Note. Interest accrues monthly at 8.5% or 30 -day LIBOR plus 6.9%, whichever is greater. The outstanding principal balance is due on December 31, 2018 but may be prepaid without penalty at any time. Issuance costs incurred with the Additional Equipment Note totaled $0.2 million and are deferred and amortized over the term of the debt using the interest method. As of September 30, 2018, the outstanding principal balance was $7.0 million and carrying amount was $6.9 million, net of unamortized debt issuance costs.

NOTE

—

DEBT

February 2018,

we borrowed

$6.0

million under a short-term note from an unrelated

third

-party lender in order to manage accounts receivable. The note is secured by a portion of our mobile mining equipment (the “Equipment Note”). Interest accrues monthly at

8.5%

-day LIBOR plus

6.9%,

whichever is greater. The outstanding principal balance is due on

December 31, 2018

but

may

be prepaid without penalty at any time. Issuance costs incurred with the Equipment Note totaled

$0.3

million and are deferred and amortized over the initial term of the debt using the interest method. Debt issuance costs are presented in the condensed consolidated balance sheet as a direct deduction from the carrying amount of the liability. During the

nine

months ended

September 30, 2018,

we repaid

million under this note. As of

September 30, 2018,

the outstanding principal balance and carrying balance was

$5.0

million.

May 2018,

we borrowed

$3.0

million from Ramaco Coal, LLC, a related party, also to manage accounts receivable. Interest accrues monthly at

10.0%.

The outstanding principal balance is due on

December 15, 2018

but

may

be prepaid without penalty at any time. As of

September 30, 2018,

the outstanding principal balance and carrying amount was

$3.0

million.

June 2018,

we borrowed an additional

$7.0

million under a short-term note from the same unrelated equipment lender in order to manage accounts receivable (the “Additional Equipment Note”). The Additional Equipment Note is also secured by the same mobile mining equipment as the Equipment Note. Interest accrues monthly at

8.5%

-day LIBOR plus

6.9%,

whichever is greater. The outstanding principal balance is due on

December 31, 2018

but

may

be prepaid without penalty at any time. Issuance costs incurred with the Additional Equipment Note totaled

$0.2

million and are deferred and amortized over the term of the debt using the interest method. As of

September 30, 2018,

the outstanding principal balance was

$7.0

million and carrying amount was

$6.9

million, net of unamortized debt issuance costs.