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v3.25.3

Deferred Royalty Obligation - Rollforward (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2025 USD ($)
Deferred Royalty Obligation |
Beginning balance | $ 120,613
Net accretion | 1,666
Net carrying amount | $ 122,279

X
- Definition The amount of net accretions adjusted with deferred royalty obligations, during the period. + References No definition available. + Details
Name: | coll_DeferredRoyaltyLiabilityAccretionsNet
Namespace Prefix: | coll_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of liability recognized arising from deferred royalty, expected to be settled beyond one year or the normal operating cycle, if longer. + References No definition available. + Details
Name: | coll_DeferredRoyaltyLiabilityNonCurrent
Namespace Prefix: | coll_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | coll_DeferredRoyaltyObligationAbstract
Namespace Prefix: | coll_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration