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Note 11 - Self-insurance | 9 Months Ended
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Sep. 30, 2021
Notes to Financial Statements |
Self Insurance [Text Block] |
(11) | SELF-INSURANCE
We self-insure our underground mining equipment. Such equipment is allocated among seven mining units dispersed over ten miles. The historical cost of such equipment was approximately $278 million and $269 million as of September 30, 2021, and December 31, 2020, respectively. Restricted cash of $3.2 million and $4.0 million as of September 30, 2021, and December 31, 2020, respectively, represents cash held and controlled by a third party and is restricted for future workers’ compensation claim payments.

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