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- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Options And Equity Instruments Other Than Options, Outstanding, Number

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- Definition

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
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- Definition

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

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-Publisher FASB
-Name Accounting Standards Codification
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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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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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- Definition

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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- Definition

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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- 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

Number of shares authorized for issuance under share-based payment arrangement.

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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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- Definition

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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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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Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 06, 2023	Feb. 28, 2023	Feb. 20, 2023	Jan. 05, 2023	Dec. 30, 2022	Nov. 19, 2022	Sep. 02, 2022	Apr. 15, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized (in shares)	10,174,421
Expiration period (in years)	10 years
Shares reserved for future award (in shares)	1,739,449
Share-based compensation expense	$ 0.7	$ 2.9
Acuitas Capital, LLC \| Keep Well Agreement \| Affiliated Entity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available borrowing capacity	$ 6.0		$ 4.0			$ 4.0	$ 14.0	$ 10.7
Warrants (in shares)			8,888,889		1,775,148	473,373			1,301,775
Exercise price of warrants (in dollars per share)			$ 0.45	$ 0.45	$ 0.45	$ 1.69			$ 1.69
Term of warrants				5 years			5 years		5 years
Acuitas Capital, LLC \| Keep Well Agreement \| Affiliated Entity \| Exchange Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants (in shares)				33,333,333
Stock options and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options and RSUs outstanding (in shares)	7,029,479
Employee \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 2.6
Unrecognized compensation costs, recognition period (in years)	2 years 5 months 1 day
Employees, Directors and Consultants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 3.3
Unrecognized compensation costs, recognition period (in years)	2 years 5 months 8 days
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	1 year
Minimum \| Acuitas Capital, LLC \| Keep Well Agreement \| Affiliated Entity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of warrants (in dollars per share)										$ 1.69
Minimum \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	4 years
Maximum \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	5 years