Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 16, 2022	Jun. 30, 2021
Document Information [Line Items]
Entity Central Index Key	0000858800
Entity Registrant Name	EMCLAIRE FINANCIAL CORP
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	000-18464
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	25-1606091
Entity Address, Address Line One	612 Main Street
Entity Address, City or Town	Emlenton
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	16373
City Area Code	844
Local Phone Number	767-2311
Title of 12(b) Security	Common Stock, par value $1.25 per share
Trading Symbol	EMCF
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 68,700,000
Entity Common Stock, Shares Outstanding		2,735,212
Auditor Name	BKD, LLP
Auditor Location	Fort Wayne, Indiana
Auditor Firm ID	686