Note 1 - Basis of Presentation (Details Textual)	Jun. 30, 2018
Number of Unconsolidated Subsidiaries	2
Number of Trust Preferred Securities Issued	2

Number of trust preferred securities issued by the entity.

No definition available.

Name:	frbk_NumberOfTrustPreferredSecuritiesIssued
Namespace Prefix:	frbk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant