Concentrations

12 Months Ended

Dec. 31, 2017

Risks and Uncertainties [Abstract]

Concentrations

16. Concentrations.

One tenant accounts for 10% of the Company’s consolidated revenues during 2017.  The mining royalty lands segment has a total of four tenants currently leasing mining locations and one lessee that accounted for 13.6% of the Company’s consolidated revenues during 2017 and $190,000 of accounts receivable at December 31, 2017.  The termination of these lessees’ underlying leases could have a material adverse effect on the Company. The Company places its cash and cash equivalents with First Tennessee Bank.  At times, such amounts may exceed FDIC limits.