Emclaire Financial Corp - Condensed Financial Statements, Parent Corporation Only - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Operating activities:
Net income	$ 4,277	$ 3,986
Adjustments to reconcile net income to net cash provided by operating activities:
Realized gains on sales of available for sale securities, net	(346)	(82)
Net cash provided by operating activities	8,214	5,660
Investing activities:
Net cash used in investing activities	(42,364)	(14,513)
Financing activities:
Proceeds from exercise of stock options	1,375	0
Dividends paid	(2,374)	(2,232)
Net cash provided by financing activities	30,956	14,875
Net increase (decrease) in cash and cash equivalents	(3,194)	6,022
Cash and cash equivalents at beginning of period	17,568	11,546
Cash and cash equivalents at end of period	14,374	17,568
Parent Company
Operating activities:
Net income	4,277	3,986
Adjustments to reconcile net income to net cash provided by operating activities:
Undistributed equity in net income of subsidiary	(1,529)	(1,244)
Realized gains on sales of available for sale securities, net	(168)	0
Other, net	35	(101)
Net cash provided by operating activities	2,615	2,641
Investing activities:
Sales (purchases) of investment securities	417	0
Investment in subsidiaries	(1,000)	(7,500)
Net cash used in investing activities	(583)	(7,500)
Financing activities:
Net change in borrowings	(1,000)	7,000
Proceeds from exercise of stock options	1,375	4
Dividends paid	(2,374)	(2,232)
Net cash provided by financing activities	(1,999)	4,772
Net increase (decrease) in cash and cash equivalents	33	(87)
Cash and cash equivalents at beginning of period	20	107
Cash and cash equivalents at end of period	$ 53	$ 20