Business and Summary of Significant Accounting Policies (Details Narrative) - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Business and Summary of Significant Accounting Policies
Joint venture partner	50.00%
Capitalized of initial acquisition costs on the Golden Crest project	$ 695,000
Cash and cash equivalents held in brokerage accounts and foreign banks	$ 451,000
Maturities period of current assets in United States Treasury Securities	15 days to one year
Current assets in United States Treasury Securities	$ 4,236,000	$ 3,989,000
Certificates of deposit, Face value	$ 100,000	250,000
Maturities period of certificates of deposit	three months to one year
Certificates of deposit, Fair value	$ 851,000	1,809,000
fair value of short-term investments	$ 102,000	$ 57,000
Potentially dilutive shares related to outstanding common stock options	5,513,000	5,558,000

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Debt (bills, notes or bonds) that are issued by the government of the United States which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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