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Note 3 - Inventory
9 Months Ended
Sep. 30, 2020
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, 2020, and December 31, 2019, coal inventory includes NRV adjustments of $0.5 million and $2.0 million, respectively.