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Accrued Expenses - Additional Information (Detail) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2019
Accrued incentive awards	$ 900,000	$ 700,000
Earnest Money Deposit	(450,000)	$ (450,000)
Other Operating accured exploration permit expenses	$ 1,800,000
Greg Stemm Our Past Chairman [Member]
Earnest Money Deposit			$ 450,000

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Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15(a))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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