Note 1 - The Business of the Company (Details) $ in Millions	Mar. 11, 2016 USD ($)	Dec. 31, 2015
Bank of America Branches [Member] | Scenario, Forecast [Member]
Note 1 - The Business of the Company (Details) [Line Items]
Number Of Bank Branches	5
Payments to Acquire Deposits (in Dollars)	$ 160.0
Payments to Acquire Property, Plant, and Equipment (in Dollars)	$ 4.0
Average Daily Closing Balance of Deposits, Percentage Payment	2.83%
Redding California [Member]
Note 1 - The Business of the Company (Details) [Line Items]
Number Of Bank Branches		3
Roseville California [Member]
Note 1 - The Business of the Company (Details) [Line Items]
Number Of Bank Branches		1