Note 14 - Disclosure of Financial Instruments Not Reported at Fair Value - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2023	Dec. 31, 2022
Cash and cash equivalents		$ 193,037	$ 167,367
Accrued interest receivable		23,777	22,157
Non-interest bearing deposits		1,714,918	1,950,198
Time deposits	[1]	863,157	472,091
Accrued interest payable		1,836	660
Reported Value Measurement [Member]
Cash and cash equivalents		193,037	167,367
HTM debt securities		445,205	473,217
Federal Home Loan Bank stock		26,241	10,928
Loans, net		5,539,009	5,132,387
Accrued interest receivable		23,777	22,157
Non-interest bearing deposits		1,714,918	1,950,198
Transaction deposits		3,824,732	3,968,963
Time deposits		863,157	472,091
Securities sold under agreement to repurchase		113,894	133,342
Federal funds purchased		11,518	8,789
Subordinated debentures		26,641	26,343
FHLB advances		350,000	50,000
Accrued interest payable		1,836	660
Estimate of Fair Value Measurement [Member]
Cash and cash equivalents		193,037	167,367
HTM debt securities		397,418	431,833
Federal Home Loan Bank stock		26,241	10,928
Loans, net		5,263,127	4,914,770
Accrued interest receivable		23,777	22,157
Non-interest bearing deposits		1,714,918	1,950,198
Transaction deposits		3,824,732	3,968,963
Time deposits		852,693	459,467
Securities sold under agreement to repurchase		113,894	133,342
Federal funds purchased		11,518	8,789
Subordinated debentures		25,988	26,460
FHLB advances		345,101	50,000
Accrued interest payable		1,836	660
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents		193,037	167,367
HTM debt securities		0	0
Federal Home Loan Bank stock		0	0
Loans, net		0	0
Accrued interest receivable		23,777	22,157
Non-interest bearing deposits		1,714,918	1,950,198
Transaction deposits		0	0
Time deposits		0	0
Securities sold under agreement to repurchase		0	0
Federal funds purchased		0	0
Subordinated debentures		0	0
FHLB advances		0	0
Accrued interest payable		1,836	660
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents		0	0
HTM debt securities		397,418	431,833
Federal Home Loan Bank stock		26,241	10,928
Loans, net		0	0
Accrued interest receivable		0	0
Non-interest bearing deposits		0	0
Transaction deposits		3,824,732	3,968,963
Time deposits		852,693	459,467
Securities sold under agreement to repurchase		113,894	133,342
Federal funds purchased		11,518	8,789
Subordinated debentures		25,988	26,460
FHLB advances		345,101	50,000
Accrued interest payable		0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalents		0	0
HTM debt securities		0	0
Federal Home Loan Bank stock		0	0
Loans, net		5,263,127	4,914,770
Accrued interest receivable		0	0
Non-interest bearing deposits		0	0
Transaction deposits		0	0
Time deposits		0	0
Securities sold under agreement to repurchase		0	0
Federal funds purchased		0	0
Subordinated debentures		0	0
FHLB advances		0	0
Accrued interest payable		$ 0	$ 0

[1] Includes $591 and $599 in brokered deposits as of September 30, 2023 and December 31, 2022, respectively.