Class Of Warrant Or Right, Issued

No definition available.

Name:	exdx_ClassOfWarrantOrRightIssued
Namespace Prefix:	exdx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Sale Of Stock, Authorized Amount

+ References

No definition available.

+ Details

Name:	exdx_SaleOfStockAuthorizedAmount
Namespace Prefix:	exdx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sale Of Stock, Remaining Authorized Amount

+ References

No definition available.

+ Details

Name:	exdx_SaleOfStockRemainingAuthorizedAmount
Namespace Prefix:	exdx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Stock Issued During Period, Shares, Warrants Exercised

+ References

No definition available.

+ Details

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Namespace Prefix:	exdx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

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-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock issued during the period.

+ References

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-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- 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.

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=exdx_PerceptiveTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=exdx_ShelfRegistrationStatementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=exdx_AtTheMarketSalesAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=exdx_A2025PublicOfferingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix:
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Balance Type:
Period Type:

Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		12 Months Ended
	May 08, 2025	Sep. 15, 2022	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Nov. 17, 2023
Subsidiary, Sale of Stock [Line Items]
Issuance of stock from warrant exercises (in shares)			804,788	0
Credit Agreement Warrants \| Perceptive Term Loan Facility
Subsidiary, Sale of Stock [Line Items]
Class of warrant or right, issued (in shares)			600,000
Shelf Registration Statement
Subsidiary, Sale of Stock [Line Items]
Common stock offering, authorized amount						$ 150.0
Common stock offering, remaining authorized amount			$ 126.2
At The Market Sales Agreement
Subsidiary, Sale of Stock [Line Items]
Proceeds from public offering, net		$ 50.0			$ 3.5
Issuance of stock, net of issuance costs (in shares)					360,554
Sale of stock (in dollars per share)					$ 9.82
Proceeds from common stock issued					$ 3.4
Estimated offering expenses for aggregate expenses					$ 0.1
Public Offering
Subsidiary, Sale of Stock [Line Items]
Proceeds from public offering, net	$ 18.6
Sale of stock (in dollars per share)	$ 5.25
Estimated offering expenses for aggregate expenses	$ 1.6
Sale of stock, number of shares issued in transaction (in shares)	3,852,500
Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	502,500