The following table presents the weighted-average assumptions used for options granted under the 2021 Plan: (Details) - $ / shares	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.19%
Plan 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option term (years)	4 years 15 days
Volatility	108.33%
Unvested forfeiture rate	0.18%
Risk-free interest rate	0.84%
Dividend yield	0.00%
Weighted-average fair value per option granted	$ 0.0504
Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option term (years)		6 years 2 months 30 days
Volatility		106.22%
Unvested forfeiture rate		0.20%
Risk-free interest rate		0.31%
Dividend yield		0.00%
Weighted-average fair value per option granted		$ 0.0057
Plan 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option term (years)		6 years 2 months 30 days
Volatility		106.46%
Unvested forfeiture rate		0.20%
Risk-free interest rate		0.28%
Dividend yield		0.00%
Weighted-average fair value per option granted		$ 0.0061

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The grant-date intrinsic value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

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