Note 5 - Low Income Housing Tax Credit Partnerships (Details Textual) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Qualified Affordable Housing Project Investments Term (Year)	23 years
Proportional Amortization Method Qualified Affordable Housing Project Investments	$ 2,627	$ 2,927
Proportional Amortization Method Qualified Affordable Housing Project Investments Unfunded Liability Obligation	$ 945	$ 1,319
Minimum [Member]
Qualified Affordable Housing Project Investments Return Rate	2.00%
Maximum [Member]
Qualified Affordable Housing Project Investments Return Rate	6.00%