CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ (DEFICIT) EQUITY (Parenthetical) $ in Thousands	3 Months Ended
Mar. 31, 2021 USD ($)
Series B Redeemable Convertible Preferred Stock [Member]
Stock issuance costs	$ 420

The amount of issuance cost associated with the issuance of temporary equity.

No definition available.

Name:	trda_TemporaryEquityIssuanceCosts
Namespace Prefix:	trda_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration