Other Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Equity income (loss)	$ (187,000)	$ 365,000
Loss on disposal of equity method investment	(538,000)
MSHA reimbursement	1,013,000	1,725,000
Miscellaneous	1,486,000	1,341,000
Total Other Income	1,774,000	3,431,000
Savoy [Member]
Equity income (loss)		460,000
Loss on disposal of equity method investment	538,000
Sunrise Energy [Member]
Equity income (loss)	$ (187,000)	$ (95,000)