STOCK-BASED COMPENSATION - Narrative (Details)	3 Months Ended	11 Months Ended
Mar. 31, 2022 shares	Mar. 31, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock purchase offering period	6 months
2020 Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	9,179,389	9,179,389
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, shares issued in period		(149,285)
Outstanding options \| 2009 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	1,233,198	1,233,198
Outstanding options \| Vical Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	112,009	112,009
Outstanding options \| 2020 Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	5,569,332	5,569,332
Shares available for grant	3,790,186	3,790,186
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant	2,450,715	2,450,715
Employee Stock \| Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount from market price, purchase date	85.00%

Share-based Compensation Arrangement By Share-based Payment Award, Stock Plan Offering Period

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- Definition

Discount rate from fair value on purchase date that participants pay for shares.

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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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- Definition

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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Number of shares issued under share-based payment arrangement.

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