Class Of Warrant Or Right, Warrant Term

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- Definition

Class of warrant or right warrants expiration month and year.

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- Definition

Common stock, maximum aggregate value purchase price.

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- Definition

Exercisable warrants maximum aggregate exercise price.

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- Definition

Ownership interest, percentage of voting rights of stock.

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- Definition

Per share exercise price for Pre-funded warrant.

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Proceeds from offering after deducting underwriting discount and other estimated offering expenses.

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- Definition

Public offering price per pre-funded warrant.

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- Definition

Warrants and rights exercisable term from following receipt of U.S. Food and drug administration approval.

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- Definition

Warrants and rights immediately exercisable term.

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No definition available.

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- Definition

Warrants expire term prior to anniversary date of issuance

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No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

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

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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.

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- Definition

Number of warrants or rights outstanding.

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Weighted-average period over which cost not yet recognized is expected to be recognized for 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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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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The cash inflow from the additional capital contribution to the entity.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Gross number of share options (or share units) granted during the period.

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

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Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Purchase price of common stock expressed as a percentage of its fair value.

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Per share or per unit amount of equity securities issued.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of new stock issued during the period.

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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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Stockholders' Equity (Deficit) - Additional Information (Detail) - USD ($)		1 Months Ended	12 Months Ended
	Dec. 16, 2022	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Aug. 26, 2022	Jul. 31, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Convertible preferred stock, shares authorized			10,000,000	10,000,000	10,000,000
Stock-based compensation expense			$ 2,530,000	$ 3,276,000
Expected dividend yield			0.00%	0.00%
Weighted average grant date fair value per option granted (in dollars per share)			$ 2.62	$ 25.5
Number of shares available for issuance under the plan on the first day of each year			8,159,382	5,324,287
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Ownership interest of voting rights of all classes of stock (percent)			10.00%
2020 Inducement Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for grant			85,668
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Income tax benefits recognized from stock-based compensation			$ 0	$ 0
Number of options granted			283,919	230,854
Expected dividend yield			0.00%
Future stock-based compensation for unvested employee options granted and outstanding			$ 3,200,000
Future stock-based compensation, requisite service period			1 year 9 months 18 days
Stock Options [Member] \| 2014 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Number of shares available for grant			16,930
Stock Options [Member] \| 2014 Equity Incentive Plan [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of fair market value			110.00%
Stock Options [Member] \| 2014 Equity Incentive Plan [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Contractual term of option			10 years
ISOs [Member] \| 2014 Equity Incentive Plan [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Contractual term of option			5 years
Performance-Based Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options granted				47,250
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Unrecognized stock based compensation expense			$ 600,000
Stock units granted			8,965	11,863
Vesting percentage			100.00%
Fair value of restricted stock units vested			$ 100,000	$ 300,000
Weighted average grant-date fair value of all restricted stock units granted			$ 5.33	$ 15.68
Weighted average remaining vesting period			1 year 1 month 6 days
Restricted Stock Units [Member] \| 2014 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants expiration date			$ 57.75	$ 57.75			$ 57.75
Stock units granted			8,965	11,863
Weighted average grant-date fair value of all restricted stock units granted			$ 5.33	$ 15.75
Warrants to Purchase Stock [Member] \| 2010 and 2012 Convertible Promissory Notes [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding (in shares)			6,804
Exercise price of warrants (in dollars per share)			$ 365.25
Warrants term			10 years
Warrants expiration period			2024-11
Underwriter [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding (in shares)			1,100
Exercise price of warrants (in dollars per share)			$ 535.50
Warrants term			10 years
Warrants expiration period			2024-11
Controlled Equity Offering Sales Agreement [Member] \| Cantor [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock (shares)			104,773
Common stock, maximum aggregate purchase price						$ 25,000,000.0
Net proceeds from sale of common stock			$ 300,000
Securities Purchase Agreement [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common stock purchased upon issuance of warrants	22,598,870
Exercise price of warrants (in dollars per share)	$ 0.4425
Tranche A [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding (in shares)	8,598,870
Warrants and rights immediately exercisable term	30 days
Warrants expire term prior to anniversary date of issuance	3 years 6 months
Exercise price of warrants (in dollars per share)	$ 1.75
Exercisable warrants maximum aggregate exercise price	$ 15,000,000.0
Tranche B [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding (in shares)	14,000,000
Warrants expire term prior to anniversary date of issuance	3 years 6 months
Warrants and rights exercisable term from following receipt of U.S. Food and drug administration approval	30 days
Exercise price of warrants (in dollars per share)	$ 2.50
Exercisable warrants maximum aggregate exercise price	$ 35,000,000.0
Underwritten Public Offering [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock (shares)		2,666,666
Price per unit		$ 3.75
Number of common stock purchased upon issuance of warrants		1,333,333
Public offering price per pre-funded warrant		$ 3.60
Per share exercise price for pre-funded warrant		$ 0.15
Measurement term		5 years
Exercise price of warrants (in dollars per share)		$ 4.50
Proceeds from offering after deducting underwriting discount and other estimated offering expenses		$ 13,800,000
Net proceeds from sale of common stock		$ 13,800,000	$ 60,000,000.0
Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for grant			1,864
Percentage of outstanding stock maximum			1.00%
Number of shares available for issuance under the plan on the first day of each year			3,729
Number of shares purchases by employees			0