Note 6 - Loans Receivable and Allowance for Loan Losses (Details) - Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Number of loans	3	3
Troubled debt restructurings, accrual status	$ 7,900	$ 7,921
Troubled debt restructurings, non-accrual status	969	1,673
Troubled debt restructurings	8,869	9,594
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	1	1
Troubled debt restructurings, accrual status	6,051	6,069
Troubled debt restructurings, non-accrual status	0	0
Troubled debt restructurings	6,051	6,069
Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	0	0
Troubled debt restructurings, accrual status	0	0
Troubled debt restructurings, non-accrual status	0	0
Troubled debt restructurings	0	0
Commercial Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	1	1
Troubled debt restructurings, accrual status	0	0
Troubled debt restructurings, non-accrual status	969	1,673
Troubled debt restructurings	969	1,673
Owner Occupied Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	1	1
Troubled debt restructurings, accrual status	1,849	1,852
Troubled debt restructurings, non-accrual status	0	0
Troubled debt restructurings	1,849	1,852
Consumer Other Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	0	0
Troubled debt restructurings, accrual status	0	0
Troubled debt restructurings, non-accrual status	0	0
Troubled debt restructurings	0	0
Residential Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	0	0
Troubled debt restructurings, accrual status	0	0
Troubled debt restructurings, non-accrual status	0	0
Troubled debt restructurings	$ 0	$ 0

Cumulative number of financing receivables that have been modified by troubled debt restructurings.

No definition available.

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

- Definition

Recorded investment in financing receivables that have undergone troubled debt restructuring and are accruing.

+ References

No definition available.

+ Details

Name:	frbk_TroubledDebtRestructuredFinancingReceivableRecordedInvestmentAndAccruing
Namespace Prefix:	frbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded investment in financing receivables that have undergone troubled debt restructuring and are not accruing.

+ References

No definition available.

+ Details

Name:	frbk_TroubledDebtRestructuredFinancingReceivableRecordedInvestmentAndNotAccruing
Namespace Prefix:	frbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=frbk_OwnerOccupiedRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateConstructionFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerOtherFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: