Concentrations	3 Months Ended
Mar. 31, 2020
Risks and Uncertainties [Abstract]
Concentrations	(9) Concentrations. The mining royalty lands segment has a total of five tenants currently leasing mining locations and one lessee that accounted for 30% of the Company’s consolidated revenues during the three months ended March 31, 2020 and $406,000 of accounts receivable at March 31, 2020. 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 Wells Fargo Bank and First Tennessee Bank. At times, such amounts may exceed FDIC limits.

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

Name:	us-gaap_ConcentrationRiskDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration