Subsequent Event	3 Months Ended
Mar. 31, 2022
Subsequent Events [Abstract]
Subsequent Event	(13) Subsequent Event. On April 1, 2022, the Company purchased a mining royalty property in Astatula, FL for $11.6 million. The property comprises 1,549 acres adjacent to the Company’s existing site in Astatula. It contains approximately 22.5 million tons of sand reserves and is currently under a mining lease to Vulcan Materials.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI https://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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