Share based compensation arrangement by share based payment award options grants grant date fair value.

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- Definition

Share based payment award shares registered due to proximity on authorized shares.

+ References

No definition available.

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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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

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

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- Definition

Amount of cash inflow from exercise of option under share-based payment arrangement.

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- Definition

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).

+ References

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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.

+ References

No definition available.

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- Definition

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

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- Definition

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

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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-Publisher FASB
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- Definition

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

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Stock Option Plan - Additional information (Detail) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Nov. 21, 2019	Aug. 19, 2019	Jul. 22, 2019	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019	May 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options issued				10,665,869	6,840,719		5,842,879
Proceeds from stock options exercised				$ 1,036	$ 442
Total intrinsic value of options				$ 800	$ 300
Stock options, granted				9,380,438	2,222,368
Stock options granted exercise price				$ 2.62	$ 3.39
Options available for future grant				30,564
Common stock, shares authorized				350,000,000	250,000,000
Restricted Stock \| Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award granted				1,601,224	805,900
Unvested Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs related to non-vested restricted stock outstanding				$ 8,100
Expected recognition period				2 years 1 month 6 days
Unvested Restricted Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected recognition period				2 years 1 month 24 days
Share-based payment award granted				1,601,224	805,900
Unrecognized stock-based compensation expense related to non-vested restricted stock arrangements				$ 2,100
the "2012 Plan"
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance								14,000,000
the "2012 Plan" \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance				2,847,190
Inducement Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options issued				32,500
Stock options, granted	65,000	65,000	400,000
Stock options granted exercise price	$ 4.59	$ 5.18	$ 5.60
Share Based compensation arrangement by share based payment award options grants grant date fair value	$ 193,000	$ 231,000	$ 1,500
the "2020 Plan"
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized						21,000,000
Options available for future grant				1,066,275		22,066,275
Share Based Payment Award Shares Registered Due to Proximity On Authorized Shares				5,750,000
the "2020 Plan" \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance				7,818,679
the "2020 Plan" \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options issued				9,208,236
the "2020 Plan" \| Director \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options issued				1,397,633
the "2020 Plan" \| Consultants \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options issued				60,000