XML 23 R9.htm IDEA: XBRL DOCUMENT
v3.21.2

Note 3 - Inventory | 9 Months Ended
--- | ---
Sep. 30, 2021
Notes to Financial Statements |
Inventory Disclosure [Text Block] |
(3) | INVENTORY
Inventory is valued at lower of average cost or net realizable value (NRV). As of September 30, 2021, and December 31, 2020, coal inventory includes NRV adjustments of $2.7 million and $1.6 million, respectively, a majority of which resulted from utilizing low sulfur coal from our Ace in the Hole mine which was necessary to blend with Oaktown coal to ship to and create additional opportunities in the southeast market.

X
- References No definition available. + Details
Name: | us-gaap_DisclosureTextBlockAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
Name: | us-gaap_InventoryDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration