INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Components of the federal income tax provision (credit)
Current tax expense	$ 2,954	$ 2,513
Deferred tax expense	629	1,347
Provision for income taxes	3,583	3,860
Source of differences between income taxes at the federal statutory rate and the provision (credit) for income taxes
Tax expense at statutory rate	3,357	3,719
Tax-exempt interest	(154)	(110)
Nondeductible expenses	249	251
Wisconsin income tax expense, net of federal impact	131
Provision for income taxes	3,583	3,860
Deferred tax assets:
NOL carryforward	1,671	2,147
Allowance for loan losses	1,277	1,144
OREO	157	177
Deferred compensation	198	253
Pension Liability	139	147
Stock compensation	159	75
Purchase accounting adjustments	832	1,507
Lease liability	928	980
Other	785	442
Total deferred tax assets	6,146	6,872
Deferred tax liabilities:
Core deposit premium	(959)	(1,108)
FHLB stock dividend	(73)	(73)
Right of use assets	(928)	(980)
Unrealized gain on securities	(522)	(273)
Other	(361)	(706)
Total deferred tax liabilities	(2,843)	(3,140)
Net deferred tax asset	3,303	$ 3,732
INCOME TAXES
Net operating loss (NOL) carryforwards	$ 8,000
Expiration period from date of origination for net operating loss carryforwards	20 years
Annual limitation for usage of NOL	$ 2,000
Annual limitation for usage of tax credits	$ 420