Consolidated Statements of Cash Flows (unaudited) (Parenthetical) $ in Thousands	9 Months Ended
Sep. 30, 2024 USD ($)
Related party for the nine months ended September 30, 2024	$ 223

Accounts Payable And Accrued Liabilities To A Related party

No definition available.

Name:	clsd_AccountsPayableAndAccruedLiabilitiesToARelatedParty
Namespace Prefix:	clsd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration