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Other Operating Income (Details) - USD ($)	12 Months Ended
Other Operating Income (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Equity income (loss)	$ (527,000)	$ (187,000)
Loss on disposal of equity method investment		(538,000)
MSHA reimbursement	575,000	1,013,000
Gain on sale of royalty interests in oil properties	2,949,000
Miscellaneous	3,029,000	1,486,000
Total Other Income	$ 6,026,000	1,774,000
Savoy [Member]
Loss on disposal of equity method investment		$ 538,000

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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