Note 8 - Loans Receivable, Net - Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Current year	$ 36,291		$ 128,145
One year before	167,338		126,865
Two years before	130,511		140,690
Three years before	137,102		86,764
Four years before	79,116		30,565
Prior	83,189		117,699
Revolving	69,692		69,909
Total	703,239		700,637
Current year, writen off	0		0
One year before gross write-offs	0		63
Two years before gross write-offs	0		53
Three years before gross write-offs	3		4
Four years before gross write-offs	3		6
Prior gross write-offs	0		15
Revolving gross write-offs	23		186
Total loans gross write-offs	29	$ 62	327
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Current year	11,864		21,126
One year before	57,279		6,224
Two years before	11,947		18,620
Three years before	18,059		10,091
Four years before	8,768		919
Prior	1,764		47,336
Revolving	724		5,612
Total	110,405		109,928
Current year, writen off	0		0
One year before gross write-offs	0		0
Two years before gross write-offs	0		0
Three years before gross write-offs	0		0
Four years before gross write-offs	0		0
Prior gross write-offs	0		0
Revolving gross write-offs	0		0
Total loans gross write-offs	0	(0)	0
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]
Current year	6,996		13,446
One year before	40,228		1,791
Two years before	9,160		13,688
Three years before	12,633		9,830
Four years before	8,518		683
Prior	1,481		33,644
Revolving	397		5,300
Total	79,413		78,382
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Caution [Member]
Current year	4,510		7,182
One year before	16,723		3,661
Two years before	1,676		4,932
Three years before	5,014		62
Four years before	61		118
Prior	160		12,176
Revolving	239		233
Total	28,383		28,364
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member]
Current year	358		364
One year before	194		75
Two years before	0		0
Three years before	0		0
Four years before	0		0
Prior	0		781
Revolving	0		0
Total	552		1,220
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member]
Current year	0		134
One year before	134		697
Two years before	1,111		0
Three years before	412		199
Four years before	189		118
Prior	123		735
Revolving	88		79
Total	2,057		1,962
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member]
Current year	7,316		36,144
One year before	38,459		59,607
Two years before	56,715		52,991
Three years before	51,209		11,128
Four years before	10,973		11,485
Prior	31,349		20,990
Revolving	12,034		11,305
Total	208,055		203,650
Current year, writen off	0		0
One year before gross write-offs	0		0
Two years before gross write-offs	0		0
Three years before gross write-offs	0		0
Four years before gross write-offs	0		0
Prior gross write-offs	0		0
Revolving gross write-offs	0		0
Total loans gross write-offs	0	(0)	0
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Pass [Member]
Current year	4,574		25,712
One year before	27,003		38,130
Two years before	36,698		42,248
Three years before	40,474		6,611
Four years before	6,659		6,651
Prior	21,645		16,280
Revolving	11,875		11,131
Total	148,928		146,763
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Caution [Member]
Current year	2,483		9,170
One year before	10,340		17,725
Two years before	17,147		9,839
Three years before	10,088		3,742
Four years before	3,702		4,586
Prior	7,778		3,244
Revolving	159		174
Total	51,697		48,480
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Special Mention [Member]
Current year	259		1,097
One year before	951		2,016
Two years before	1,562		63
Three years before	220		413
Four years before	250		248
Prior	306		64
Revolving	0		0
Total	3,548		3,901
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Substandard [Member]
Current year	0		165
One year before	165		1,736
Two years before	1,308		841
Three years before	427		362
Four years before	362		0
Prior	1,620		1,402
Revolving	0		0
Total	3,882		4,506
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Current year	9,165		47,854
One year before	57,212		48,862
Two years before	50,784		61,535
Three years before	61,331		60,895
Four years before	55,739		17,240
Prior	45,323		47,913
Revolving	10,664		4,210
Total	290,218		288,509
Current year, writen off	0		0
One year before gross write-offs	0		0
Two years before gross write-offs	0		0
Three years before gross write-offs	0		0
Four years before gross write-offs	0		0
Prior gross write-offs	0		0
Revolving gross write-offs	0		0
Total loans gross write-offs	0	(0)	0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Pass [Member]
Current year	5,276		29,719
One year before	30,698		27,652
Two years before	28,063		51,892
Three years before	51,056		44,891
Four years before	43,432		12,724
Prior	32,243		27,983
Revolving	6,692		1,696
Total	197,460		196,557
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Caution [Member]
Current year	3,889		17,770
One year before	18,646		15,057
Two years before	16,210		7,994
Three years before	9,520		15,307
Four years before	11,626		3,315
Prior	10,606		8,076
Revolving	3,972		2,415
Total	74,469		69,934
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Current year	0		198
One year before	7,277		138
Two years before	132		874
Three years before	0		438
Four years before	432		1,201
Prior	2,474		11,109
Revolving	0		99
Total	10,315		14,057
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Substandard [Member]
Current year	0		167
One year before	591		6,015
Two years before	6,379		775
Three years before	755		259
Four years before	249		0
Prior	0		745
Revolving	0		0
Total	7,974		7,961
Commercial and Agricultural Loans [Member]
Current year	5,681		15,011
One year before	7,154		7,198
Two years before	6,802		4,035
Three years before	3,452		3,359
Four years before	2,573		340
Prior	580		1,325
Revolving	5,241		5,602
Total	31,483		36,870
Current year, writen off	0		0
One year before gross write-offs	0		23
Two years before gross write-offs	0		35
Three years before gross write-offs	0		0
Four years before gross write-offs	0		0
Prior gross write-offs	0		2
Revolving gross write-offs	0		22
Total loans gross write-offs	0	21	82
Commercial and Agricultural Loans [Member] | Pass [Member]
Current year	2,415		5,750
One year before	2,477		3,239
Two years before	3,024		2,992
Three years before	2,768		2,370
Four years before	1,653		320
Prior	521		470
Revolving	4,128		4,457
Total	16,986		19,598
Commercial and Agricultural Loans [Member] | Caution [Member]
Current year	741		9,233
One year before	4,546		3,356
Two years before	3,184		941
Three years before	569		889
Four years before	899		10
Prior	11		814
Revolving	905		952
Total	10,855		16,195
Commercial and Agricultural Loans [Member] | Special Mention [Member]
Current year	2,525		7
One year before	6		429
Two years before	422		0
Three years before	0		70
Four years before	0		0
Prior	0		0
Revolving	110		100
Total	3,063		606
Commercial and Agricultural Loans [Member] | Substandard [Member]
Current year	0		21
One year before	125		174
Two years before	172		102
Three years before	115		30
Four years before	21		10
Prior	48		41
Revolving	98		93
Total	579		471
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Current year	0		0
One year before	0		0
Two years before	0		0
Three years before	0		0
Four years before	0		0
Prior	0		0
Revolving	39,317		37,837
Total	39,317		37,837
Current year, writen off	0		0
One year before gross write-offs	0		0
Two years before gross write-offs	0		0
Three years before gross write-offs	0		0
Four years before gross write-offs	0		0
Prior gross write-offs	0		0
Revolving gross write-offs	0		0
Total loans gross write-offs	0	(0)	0
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Pass [Member]
Current year	0		0
One year before	0		0
Two years before	0		0
Three years before	0		0
Four years before	0		0
Prior	0		0
Revolving	29,004		29,142
Total	29,004		29,142
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Caution [Member]
Current year	0		0
One year before	0		0
Two years before	0		0
Three years before	0		0
Four years before	0		0
Prior	0		0
Revolving	8,003		7,612
Total	8,003		7,612
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Special Mention [Member]
Current year	0		0
One year before	0		0
Two years before	0		0
Three years before	0		0
Four years before	0		0
Prior	0		0
Revolving	1,834		534
Total	1,834		534
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Substandard [Member]
Current year	0		0
One year before	0		0
Two years before	0		0
Three years before	0		0
Four years before	0		0
Prior	0		0
Revolving	476		549
Total	476		549
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Current year	2,265		8,010
One year before	7,234		4,974
Two years before	4,263		3,509
Three years before	3,051		1,291
Four years before	1,063		581
Prior	4,173		135
Revolving	1,712		5,343
Total	23,761		23,843
Current year, writen off	0		0
One year before gross write-offs	0		40
Two years before gross write-offs	0		18
Three years before gross write-offs	3		4
Four years before gross write-offs	3		6
Prior gross write-offs	0		13
Revolving gross write-offs	23		164
Total loans gross write-offs	29	$ 41	245
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Pass [Member]
Current year	1,704		5,328
One year before	4,741		3,386
Two years before	2,904		2,205
Three years before	1,939		776
Four years before	616		338
Prior	3,896		52
Revolving	1,408		5,039
Total	17,208		17,124
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Caution [Member]
Current year	509		2,550
One year before	2,371		1,501
Two years before	1,299		1,243
Three years before	1,050		434
Four years before	367		217
Prior	250		78
Revolving	287		285
Total	6,133		6,308
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Special Mention [Member]
Current year	52		132
One year before	112		56
Two years before	31		22
Three years before	15		0
Four years before	0		0
Prior	0		0
Revolving	10		8
Total	220		218
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Substandard [Member]
Current year	0		0
One year before	10		31
Two years before	29		39
Three years before	47		81
Four years before	80		26
Prior	27		5
Revolving	7		11
Total	$ 200		$ 193