Note 4 - Debt	3 Months Ended
Mar. 31, 2018
Notes to Financial Statements
Debt Disclosure [Text Block]	NOTE 4 — DEBT In February 2018, we borrowed $6 million under a six -month credit facility in order to manage accounts receivable. The credit facility is secured by a portion of our mobile mining equipment. Interest accrues monthly at 8.5% or 30 -day LIBOR plus 6.9%, whichever is greater. Principal and interest are due on August 31, 2018 but may be prepaid without penalty at any time. Issuance costs incurred with this debt financing totaled $257 thousand and are deferred and amortized over the term of the debt using the interest method. Debt issuance costs are presented in the consolidated balance sheet as a direct deduction from the carrying amount of the debt liability.

Note 4 - Debt

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Text Block]

NOTE

—

DEBT

February 2018,

we borrowed

million under a

six

-month credit facility in order to manage accounts receivable. The credit facility is secured by a portion of our mobile mining equipment. Interest accrues monthly at

8.5%

-day LIBOR plus

6.9%,

whichever is greater. Principal and interest are due on

August 31, 2018

but

may

be prepaid without penalty at any time.

Issuance costs incurred with this debt financing totaled

$257

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