Note 8 - Qualified Affordable Housing Partnership Investments - Original Investment in LIHTC Projects (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Original Investment	$ 7,954		$ 7,954
Current Recorded Investment	4,046		4,217
Unfunded Liability Obligation	478		485
Tax Credits and Benefits	203		843
Amortization of Investments	171	$ 180	598
Net Income Tax Benefit	32		245
Raymond James California Housing Opportunities Fund II [Member]
Original Investment	2,000		2,000
Current Recorded Investment	1,317		1,361
Unfunded Liability Obligation	45		45
Tax Credits and Benefits	56		227
Amortization of Investments	45		192
Net Income Tax Benefit	11		35
WNC Institutional Tax Credit Fun 38 L.P. [Member]
Original Investment	1,000		1,000
Current Recorded Investment	671		698
Unfunded Liability Obligation	66		73
Tax Credits and Benefits	35		140
Amortization of Investments	26		100
Net Income Tax Benefit	9		40
Merritt Community Capital Corporation Fund XV, L.P. [Member]
Original Investment	2,500		2,500
Current Recorded Investment	1,657		1,713
Unfunded Liability Obligation	367		367
Tax Credits and Benefits	68		274
Amortization of Investments	56		106
Net Income Tax Benefit	12		168
California Affordable Housing Fund [Member]
Original Investment	2,454		2,454
Current Recorded Investment	401		445
Unfunded Liability Obligation
Tax Credits and Benefits	44		202
Amortization of Investments	44		200
Net Income Tax Benefit			$ 2