Note 6 - Qualified Affordable Housing Partnership Investments - Original Investment in LIHTC Projects (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Tax Credits and Benefits			$ 405		$ 848
Amortization of Investments	$ 164	$ 180	335	$ 360	598
Net Income Tax Benefit			70		250
Original Investment	7,954		7,954		7,954
Current Recorded Investment	3,882		3,882		4,217
Unfunded Liability Obligation	467		467		485
Raymond James California Housing Opportunities Fund II [Member]
Tax Credits and Benefits			112		238
Amortization of Investments			94		192
Net Income Tax Benefit			18		46
Original Investment	2,000		2,000		2,000
Current Recorded Investment	1,267		1,267		1,361
Unfunded Liability Obligation	45		45		45
WNC Institutional Tax Credit Fun 38 L.P. [Member]
Tax Credits and Benefits			70		143
Amortization of Investments			53		100
Net Income Tax Benefit			17		43
Original Investment	1,000		1,000		1,000
Current Recorded Investment	644		644		698
Unfunded Liability Obligation	55		55		73
Merritt Community Capital Corporation Fund XV, L.P. [Member]
Tax Credits and Benefits			136		266
Amortization of Investments			100		106
Net Income Tax Benefit			36		160
Original Investment	2,500		2,500		2,500
Current Recorded Investment	1,614		1,614		1,713
Unfunded Liability Obligation	367		367		367
California Affordable Housing Fund [Member]
Tax Credits and Benefits			87		201
Amortization of Investments			88		200
Net Income Tax Benefit			(1)		1
Original Investment	2,454		2,454		2,454
Current Recorded Investment	357		357		445
Unfunded Liability Obligation