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v3.25.3

Inventory, Net.- Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Inventory Disclosure [Abstract] |  |  |  |
Inventory unsalable product |  |  | $ 500,000 |
Inventory reserve | $ 200,000 | $ 0 | $ 400,000 | $ 0

X
- Definition Inventory reserve. + References No definition available. + Details
Name: | cprx_InventoryReserve
Namespace Prefix: | cprx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Inventory write down expected to be reimbursed. + References No definition available. + Details
Name: | cprx_InventoryWriteDownExpectedToBeReimbursed
Namespace Prefix: | cprx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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