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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

Price of a single share of a number of saleable stocks of a company.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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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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Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
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Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
-Name Accounting Standards Codification
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Schedule of Key Assumption of Fair Value of Stock Options Granted (Details)	6 Months Ended
	Jun. 30, 2023 $ / shares	Jun. 30, 2022	Dec. 31, 2022 $ / shares
Subsidiary, Sale of Stock [Line Items]
Expected term	5 years 8 months 23 days	5 years 9 months 7 days
Risk-free interest rate	3.73%	1.93%
Expected dividend yield
Expected volatility	98.97%	101.67%
November 2019 Offering [Member] \| Fair Value, Inputs, Level 3 [Member] \| Measurement Input, Expected Term [Member]
Subsidiary, Sale of Stock [Line Items]
Expected life in years	1 year 4 months 17 days		1 year 10 months 17 days
November 2019 Offering [Member] \| Fair Value, Inputs, Level 3 [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Subsidiary, Sale of Stock [Line Items]
Warrants measurement input	5.25		4.41
November 2019 Offering [Member] \| Fair Value, Inputs, Level 3 [Member] \| Measurement Input, Expected Dividend Rate [Member]
Subsidiary, Sale of Stock [Line Items]
Warrants measurement input
November 2019 Offering [Member] \| Fair Value, Inputs, Level 3 [Member] \| Measurement Input, Option Volatility [Member]
Subsidiary, Sale of Stock [Line Items]
Warrants measurement input	100.00		100.00
November 2019 Offering [Member] \| Fair Value, Inputs, Level 3 [Member] \| Measurement Input, Share Price [Member]
Subsidiary, Sale of Stock [Line Items]
Stock price	$ 5.04		$ 6.77