OTHER FINANCIAL INFORMATION - Prepaid Expense and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Clinical drug substance and product manufacturing	$ 1,998	$ 9,888
Clinical trials	3,544	5,409
Licenses	816	728
Outside research and development services	642	265
Other	382	366
Prepaid expense and other current assets	$ 7,382	$ 16,656

Clinical Drug Substance and Product Manufacturing, Prepaid Expense Current

No definition available.

Name:	inhibrx_ClinicalDrugSubstanceAndProductManufacturingPrepaidExpenseCurrent
Namespace Prefix:	inhibrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Clinical Trails, Prepaid Expense Current

+ References

No definition available.

+ Details

Name:	inhibrx_ClinicalTrailsPrepaidExpenseCurrent
Namespace Prefix:	inhibrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Outside Research And Development Services, Prepaid Expense Current

+ References

No definition available.

+ Details

Name:	inhibrx_OutsideResearchAndDevelopmentServicesPrepaidExpenseCurrent
Namespace Prefix:	inhibrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Prepaid License Current

+ References

No definition available.

+ Details

Name:	inhibrx_PrepaidLicenseCurrent
Namespace Prefix:	inhibrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of current assets classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(8))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_OtherAssetsCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(9))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant