Note 11 - Fair Value and Interest Rate Risk - Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available-for-sale securities	$ 50,057	$ 39,496
Interest rate swap receivable	874	286
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities	18,183	20,473
Corporate Debt Securities [Member]
Available-for-sale securities	16,863	12,974
Subordinated Notes [Member]
Available-for-sale securities	8,192	4,564
SBA Loan Pools [Member]
Available-for-sale securities	5,320
US Treasury Securities [Member]
Available-for-sale securities	1,499	1,485
Fair Value, Recurring [Member]
Available-for-sale securities	50,057	39,496
Impaired PCI Loans, net	182	615
Contingent consideration liability	86	707
Interest rate swap receivable	874	286
Interest rate swap liability	874	286
Fair Value, Recurring [Member] \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities	18,183	20,473
Fair Value, Recurring [Member] \| Corporate Debt Securities [Member]
Available-for-sale securities	16,863	12,974
Fair Value, Recurring [Member] \| Subordinated Notes [Member]
Available-for-sale securities	8,192	4,564
Fair Value, Recurring [Member] \| SBA Loan Pools [Member]
Available-for-sale securities	5,320
Fair Value, Recurring [Member] \| US Treasury Securities [Member]
Available-for-sale securities	1,499	1,485
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Available-for-sale securities
Impaired PCI Loans, net
Contingent consideration liability
Interest rate swap receivable
Interest rate swap liability
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Corporate Debt Securities [Member]
Available-for-sale securities
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Subordinated Notes [Member]
Available-for-sale securities
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| SBA Loan Pools [Member]
Available-for-sale securities
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| US Treasury Securities [Member]
Available-for-sale securities
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Available-for-sale securities	50,057	39,496
Impaired PCI Loans, net
Contingent consideration liability
Interest rate swap receivable	874	286
Interest rate swap liability	874	286
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities	18,183	20,473
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Corporate Debt Securities [Member]
Available-for-sale securities	16,863	12,974
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Subordinated Notes [Member]
Available-for-sale securities	8,192	4,564
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| SBA Loan Pools [Member]
Available-for-sale securities	5,320
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| US Treasury Securities [Member]
Available-for-sale securities	1,499	1,485
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Available-for-sale securities
Impaired PCI Loans, net	182	615
Contingent consideration liability	86	707
Interest rate swap receivable
Interest rate swap liability
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Corporate Debt Securities [Member]
Available-for-sale securities
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Subordinated Notes [Member]
Available-for-sale securities
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| SBA Loan Pools [Member]
Available-for-sale securities
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| US Treasury Securities [Member]
Available-for-sale securities

Fair value portion of impaired PCI loans receivables.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Fair value of contingent consideration in a business combination that is classified in shareholders' equity.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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