Commitments and Contingencies - Additional Information (Detail)	Dec. 31, 2024 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Future minimum charter revenues next twelve months	$ 782,865

Future minimum payments due future minimum sublease rentals for next twelve months

No definition available.

Name:	ciss_FutureMinimumPaymentsDueFutureMinimumSubleaseRentalsForNextTwelveMonths
Namespace Prefix:	ciss_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant