Note 7 - Goodwill and Intangibles (Details Textual) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jan. 14, 2022	Dec. 31, 2021
Goodwill, Ending Balance		$ 71,498,000		$ 71,498,000			$ 69,243,000
Amortization of Intangible Assets				2,249,000	$ 3,411,000
Core Deposits [Member]
Finite-Lived Intangible Assets, Gross, Total		4,200,000		4,200,000			$ 4,100,000
Amortization of Intangible Assets		$ 277,000	$ 287,000	$ 556,000	$ 588,000
Core Deposits [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)				8 years
Core Deposits [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)				10 years
Acquisition of the Honolulu, Hawaii Branch Office of the Bank of the Orient [Member]
Goodwill, Ending Balance						$ 2,300,000
Acquisition of the Honolulu, Hawaii Branch Office of the Bank of the Orient [Member] | Core Deposits [Member]
Finite-lived Intangible Assets Acquired	$ 729,000