SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Available-for-Sale Investments and Debt Security Investments (Details) - USD ($)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Available-for-sale investments and Debt Security investments [Abstract]
Other-than-temporary impairment loss has been recognized in statement of operations	$ 0	$ 0

Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI).

No definition available.

Name:	cenn_OtherThanTemporaryImpairmentLossesDebtSecuritiesAvailableForSale
Namespace Prefix:	cenn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration