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Note 15 - Stock Based Compensation (Details) - Valuation Assumptions
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Note 15 - Stock Based Compensation (Details) - Valuation Assumptions [Line Items]      
Dividend yield(1) 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate [1] 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate [1] 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate [1]
Expected life(4)   7 years [2] 7 years [2]
Minimum [Member]      
Note 15 - Stock Based Compensation (Details) - Valuation Assumptions [Line Items]      
Expected volatility(2) 55.79%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 [3] 54.88%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 [3] 53.12%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 [3]
Risk-free interest rate(3) 1.51%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 [4] 1.28%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 [4] 1.01%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 [4]
Expected life(4) 5 years 6 months [2]    
Maximum [Member]      
Note 15 - Stock Based Compensation (Details) - Valuation Assumptions [Line Items]      
Expected volatility(2) 57.99%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 [3] 55.61%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 [3] 54.49%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 [3]
Risk-free interest rate(3) 2.26%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 [4] 2.03%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 [4] 1.61%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 [4]
Expected life(4) 7 years [2]    
[1] A dividend yield of 0.0% is utilized because cash dividends have never been paid.
[2] The expected life reflects a 1 to 4 year vesting period, the maximum ten year term and review of historical behavior.
[3] Expected volatility is based on Bloomberg's five and one-half to seven year volatility calculation for "FRBK" stock.
[4] The risk-free interest rate is based on the five to seven year Treasury bond.