Summary of Significant Accounting Policies (Details) $ in Millions	Sep. 30, 2021 USD ($)
Summary of Significant Accounting Policies
Deferred offering cost non-current	$ 2.2

Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period classified as noncurrent.

No definition available.

Name:	trda_DeferredOfferingCostsNoncurrent
Namespace Prefix:	trda_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant