Statements of Convertible Perferred Stock and Stockholder's Equity (Deficit) (Parenthetical) $ in Thousands	12 Months Ended
Dec. 31, 2021 USD ($)
Statement of Stockholders' Equity [Abstract]
Discount and issuance cost	$ 2,090

Issuance of initial public offering of underwriter, commissions and discounts,net.

No definition available.

Name:	RNXT_IssuanceOfinitialPublicofferingOfUnderwritersCommissionsDiscountsNet
Namespace Prefix:	RNXT_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration