The number of securities for which warrants become exercisable.

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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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No definition available.

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Fair value of stock issued on exercise of warrants.

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No definition available.

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- Definition

Number of warrants purchase common stock exchanged under the warrant exercise inducement offer.

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No definition available.

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Represents the exchange ratio of warrants to common stock under the cashless exercise feature.

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- Definition

The threshold period from issuance date from which the warrants are exercisable.

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No definition available.

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- Definition

Represents the number of contingent settlement methods.

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- Definition

The number of warrants exercised.

+ References

No definition available.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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- Definition

Number of warrants or rights outstanding.

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No definition available.

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- Definition

Number of new stock issued during the period.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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- References

No definition available.

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- Definition

Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

+ References

No definition available.

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- Definition

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
-Publisher FASB
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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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Fair value portion of warrants not settleable in cash classified as equity.

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Warrants - Ladenburg Warrants (Details)						1 Months Ended		12 Months Ended
Warrants - Ladenburg Warrants (Details)	Sep. 03, 2021	Jan. 08, 2021 shares	Dec. 22, 2020	Jul. 21, 2020 USD ($) shares	Jul. 23, 2019 USD ($) $ / shares shares	May 31, 2020 USD ($) $ / shares item shares	Mar. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Apr. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2019 shares	Oct. 31, 2018 $ / shares shares	Aug. 28, 2018 shares
Warrants
Warrants to purchase (in shares)													9,580
Fair value of warrants \| $								$ 1,000
Warrant liability \| $								$ 1,000	$ 179,000
Warrants outstanding								563,451	2,401,818		6,473,964
Reverse stock split ratio	0.33
Series A Warrants \| Stock price
Warrants
Warrants - Measurement input \| $ / shares								1.04	2.45
Series A Warrants \| Strike price
Warrants
Warrants - Measurement input \| $ / shares								2,363	2,363
Series A Warrants \| Expected life
Warrants
Term of warrant								4 months 28 days	1 year 4 months 28 days
Series A Warrants \| Volatility
Warrants
Warrants - Measurement input								89	148
Series A Warrants \| Risk free rate
Warrants
Warrants - Measurement input								0.19	0.13
Series 3 warrants
Warrants
Warrants to purchase (in shares)						2,890,284
Exercise price (in dollars per share) \| $ / shares						$ 1.59
Warrants exercisable period						6 months
Term of warrant						5 years
Contingent settlement methods \| item						2
Warrants conversion						1		1
Warrant liability \| $						$ 3,700,000
Warrants exercised				2,818,784				206,915
Number of warrants purchase common stock exchanged		135,416				1,335,020
Warrants outstanding								0	71,500
Aggregate fair value of the common stocks issued by the exercise of Warrants \| $				$ 6,100,000				$ 1,800,000
Series 3 warrants \| Stock price
Warrants
Warrants - Measurement input \| $ / shares						0.15			2.45
Series 3 warrants \| Strike price
Warrants
Warrants - Measurement input \| $ / shares						1.32			0.00
Series 3 warrants \| Expected life
Warrants
Term of warrant						5 years 6 months			4 years 10 months 20 days
Series 3 warrants \| Volatility
Warrants
Warrants - Measurement input						141			142
Series 3 warrants \| Risk free rate
Warrants
Warrants - Measurement input						0.34			0.36
Underwriter Warrants
Warrants
Warrants to purchase (in shares)										33,592		5,713
Exercise price (in dollars per share) \| $ / shares										$ 7.50		$ 157.50
Warrant liability \| $										$ 32,000
Underwriter Warrants \| Stock price
Warrants
Warrants - Measurement input \| $ / shares								1.04	2.45	7.50
Underwriter Warrants \| Strike price
Warrants
Warrants - Measurement input \| $ / shares									158	1.35
Fair value of warrants \| $								$ 158
Underwriter Warrants \| Expected life
Warrants
Term of warrant								1 year 9 months	2 years 9 months 3 days	4 years 3 months
Underwriter Warrants \| Volatility
Warrants
Warrants - Measurement input								180	156	141
Underwriter Warrants \| Risk free rate
Warrants
Warrants - Measurement input								0.65	0.17	0.29
March 2019 LOC Warrants
Warrants
Warrants exercisable					15,250
Fair value of warrants \| $					$ 71,000
2019 Bridge Note Warrants
Warrants
Warrants exercisable					927,083
Fair value of warrants \| $					$ 4,300,000
Warrants exercised		135,416						135,416
Warrants outstanding								190,622	634,370
2019 Bridge Note Warrants \| Stock price
Warrants
Warrants - Measurement input \| $ / shares					5.19
2019 Bridge Note Warrants \| Strike price
Warrants
Warrants - Measurement input \| $ / shares					6.00
2019 Bridge Note Warrants \| Expected life
Warrants
Term of warrant					4 years 9 months 18 days
2019 Bridge Note Warrants \| Volatility
Warrants
Warrants - Measurement input					146
2019 Bridge Note Warrants \| Risk free rate
Warrants
Warrants - Measurement input					1.76
Minimum
Warrants
Reverse stock split ratio			0.5
Maximum
Warrants
Reverse stock split ratio			0.05
Securities purchase agreement \| March 2019 Ladenburg Warrants
Convertible Promissory Notes and Common Stock Warrants [Line Items]
Shares issued (in shares)							6,339
Warrants
Warrants to purchase (in shares)							253
Exercise price (in dollars per share) \| $ / shares							$ 52.50
Warrant liability \| $							$ 13,000
Securities purchase agreement \| March 2019 Ladenburg Warrants \| Stock price
Warrants
Warrants - Measurement input \| $ / shares							52.50
Securities purchase agreement \| March 2019 Ladenburg Warrants \| Strike price
Warrants
Warrants - Measurement input \| $ / shares							56.70
Securities purchase agreement \| March 2019 Ladenburg Warrants \| Expected life
Warrants
Term of warrant							5 years
Securities purchase agreement \| March 2019 Ladenburg Warrants \| Volatility
Warrants
Warrants - Measurement input							146
Securities purchase agreement \| March 2019 Ladenburg Warrants \| Risk free rate
Warrants
Warrants - Measurement input							2.21