Amount of fixed monthly installment payment amount due under the terms of the license agreement.

No definition available.

Name:	kala_LicenseAgreementCashFeesAmountOfPaymentInstallments
Namespace Prefix:	kala_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash fees payable under the terms of the license agreement.

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementCashFeesAmountPayable
Namespace Prefix:	kala_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the total number of monthly installment payments required under the terms of the license agreement.

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementCashFeesNumberOfPaymentInstallments
Namespace Prefix:	kala_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of cash to be paid by the Company upon each extension of the Agreement for a Renewal Term.

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementCashPaymentAmountRenewalTerm
Namespace Prefix:	kala_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents initial term of the license agreement.

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementInitialTerm
Namespace Prefix:	kala_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of maximum cash fees agreed to pay for the initial term under the terms of the license agreement.

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementMaximumCashFees
Namespace Prefix:	kala_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the maximum percentage of the Daily Trading Volume that is permitted to sell Shares on any Trading Day pursuant to the terms of the License Agreement.

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementMaximumDailyTradingVolumePercentage
Namespace Prefix:	kala_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the purchase price for option to acquire either all equity interests or all assets .

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementOptionToAcquireEquityInterestsOrAllAssetsPurchasePrice
Namespace Prefix:	kala_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow associated with payment of cash fees under the terms of the license agreement..

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementPaymentOfCashFees
Namespace Prefix:	kala_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents renewal term of the license agreement.

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementRenewalTerm
Namespace Prefix:	kala_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the period within which the Company is required to issue common stock for renewal term.

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementShareIssuancePeriodRenewalPeriod
Namespace Prefix:	kala_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of common stock shares agreed to be issued during the renewal period under the license agreement.

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementSharesAgreedToIssueRenewalTerm
Namespace Prefix:	kala_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the notice period of termination of the continued development under the license agreement.

+ References

No definition available.

+ Details

Name:	kala_LicenseAgreementTerminationNoticePeriod
Namespace Prefix:	kala_
Data Type:	xbrli:durationItemType
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 808
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479402/808-10-50-1

+ Details

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

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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

- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_TypeOfArrangementAxis=kala_PlatformDevelopmentAndExclusiveLicenseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=kala_YounetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LICENSE AGREEMENT (Details) $ / shares in Units, $ in Thousands	Aug. 19, 2026 USD ($)	Mar. 03, 2026 USD ($) installment $ / shares shares	Jun. 30, 2026 $ / shares	Jan. 08, 2026 $ / shares	Dec. 31, 2025 $ / shares
LICENSE AGREEMENT
Common stock, par value \| $ / shares			$ 0.001	$ 0.001	$ 0.001
Platform Development and Exclusive License Agreement \| Younet
LICENSE AGREEMENT
Initial term (in months)		12 months
Renewal term (in months)		12 months
Maximum cash fees		$ 530
Cash fees paid in cash		80
Cash fees payable		$ 450
Number of installments \| installment		9
Amount of payment installment		$ 50
Termination notice period (in days)		30 days
Issuance of common stock to satisfy service contract (in shares) \| shares		100,000
Common stock, par value \| $ / shares		$ 0.001
Share issuance period, renewal term (in days)		10 days
Cash payment, renewal term		$ 250
Shares agreed to issue in renewal term (in shares) \| shares		100,000
Maximum percentage of daily trading volume (in percent)		3.00%
Purchase price		$ 55,000
Platform Development and Exclusive License Agreement \| Younet \| Subsequent Event
LICENSE AGREEMENT
Cash fees paid in cash	$ 200