INVESTMENT IN EQUITY SECURITIES, AT FAIR VALUE AND LONG-TERM INVESTMENTS - Summary of Long-term investments (Details) - USD ($) $ in Thousands |
12 Months Ended | 24 Months Ended | |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2025 |
|
| Schedule Of Long Term Investments | |||
| Cost | $ 2,581 | $ 2,581 | $ 2,581 |
| Gross unrealized losses (including impairment) | (865) | (865) | |
| Carrying amount | 1,716 | 1,716 | 1,716 |
| Alesta Tx | Common Stock | |||
| Schedule Of Long Term Investments | |||
| Cost | 2,250 | 2,250 | 2,250 |
| Gross unrealized losses (including impairment) | (865) | (865) | |
| Carrying amount | $ 1,385 | $ 1,385 | $ 1,385 |
| Investment, Type [Extensible Enumeration] | casi:EquitySecuritiesWithoutReadilyDeterminableFairValueMember | casi:EquitySecuritiesWithoutReadilyDeterminableFairValueMember | casi:EquitySecuritiesWithoutReadilyDeterminableFairValueMember |
| Alesta Tx | Preferred Stock | |||
| Schedule Of Long Term Investments | |||
| Cost | $ 331 | $ 331 | $ 331 |
| Carrying amount | $ 331 | $ 331 | $ 331 |
| Investment, Type [Extensible Enumeration] | casi:EquitySecuritiesWithoutReadilyDeterminableFairValueMember | casi:EquitySecuritiesWithoutReadilyDeterminableFairValueMember | casi:EquitySecuritiesWithoutReadilyDeterminableFairValueMember |
| X | ||||||||||
- Definition Amount of unrealized gain (loss) on investment in debt and equity securities including impairment charges. No definition available.
|
| X | ||||||||||
- 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. No definition available.
|
| X | ||||||||||
- Definition Cost of investment in debt investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Indicates type of investment. Includes, but is not limited to, common stock, preferred stock, convertible security, fixed income security, government security, option purchased, warrant, loan participation and assignment, commercial paper, bankers' acceptance, certificates of deposit, short-term security, repurchase agreement, and other investment company. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|