Note 1 - Nature of Operations (Details Textual)	Dec. 31, 2019
Number of Wholly Owned Subsidiary	1
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