Note 23 - Acquisition - Assets and Liabilities Acquired (Details) - Subsequent Event [Member] $ in Thousands		1 Months Ended
	Jan. 31, 2019 USD ($)	Jan. 31, 2019 USD ($)
Merchants Holding Company [Member]
Assets acquired:
Cash and fed funds sold	$ 12,425	$ 12,425
Investment securities	107,931	107,931
Loans, gross	87,570	87,570
Allowance for loan and lease losses	(1,286)	(1,286)
Interest receivable	688	688
Premises and equipment, net	378	378
Deferred tax asset, net	1,374	1,374
Federal Home Loan Bank of San Francisco stock	1,454	1,454
Life insurance	755	755
Other assets	371	371
Core deposit intangible
Total assets acquired	211,660	211,660
Liabilities assumed:
Demand and savings deposits	152,213	152,213
Certificates of deposit	38,003	38,003
Total deposits	190,216	190,216
Other liabilities	916	916
Total liabilities assumed	191,132	191,132
Net identifiable assets acquired over liabilities assumed	20,528	20,528
Merchants Holding Company [Member]
Consideration paid:
Cash	15,300	15,300
Stock 1,834,142 shares at $10.69 per share		19,607
Total consideration		34,907
Assets acquired:
Cash and fed funds sold	12,425	12,425
Investment securities	107,380	107,380
Investment securities, adjustment		(551)
Loans, gross	85,278	85,278
Allowance for loan and lease losses
Allowance for loan and lease losses, adjustment		1,286
Interest receivable	688	688
Premises and equipment, net	2,234	2,234
Premises and equipment, net, adjustment		1,856
Deferred tax asset, net	87	87
Federal Home Loan Bank of San Francisco stock	1,454	1,454
Life insurance	755	755
Other assets	361	361
Other assets, adjustment		(10)
Core deposit intangible	4,353	4,353
Core deposit intangible, adjustment		4,353
Total assets acquired	215,015	215,015
Total assets acquired, adjustment		3,355
Liabilities assumed:
Demand and savings deposits	152,213	152,213
Certificates of deposit	38,003	38,003
Total deposits	190,216	190,216
Other liabilities	931	931
Other liabilities, adjustment		15
Total liabilities assumed	191,147	191,147
Total liabilities assumed, adjustment		15
Net identifiable assets acquired over liabilities assumed	23,868	23,868
Net identifiable assets acquired over liabilities assumed, adjustment		3,340
Goodwill	$ 11,039	$ 11,039