CAPITAL MATTERS - Summary (Details) $ in Thousands	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk weighted assets), Actual, Amount	$ 166,781	$ 160,302
Total capital (to risk weighted assets), Actual, Ratio	0.140	0.131
Total capital (to risk weighted assets), For Capital Adequacy Purposes, Amount	$ 95,059	$ 98,174
Total capital (to risk weighted assets), For Capital Adequacy Purposes, Ratio	0.080	0.080
Total capital (to risk weighted assets), To Be Well Capitalized, Amount	$ 118,824	$ 122,718
Total capital (to risk weighted assets), To Be Well Capitalized, Ratio	0.100	0.100
Tier 1 capital (to risk weighted assets), Actual, Amount	$ 153,408	$ 149,982
Tier 1 capital (to risk weighted assets), Actual, Ratio	0.129	0.122
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes, Amount	$ 71,295	$ 73,631
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes, Ratio	0.060	0.060
Tier 1 capital (to risk weighted assets), To Be Well Capitalized, Amount	$ 95,059	$ 98,174
Tier 1 capital (to risk weighted assets), To Be Well Capitalized, Ratio	0.080	0.080
Common equity tier 1 (to risk weighted assets), Actual, Amount	$ 153,408	$ 149,982
Common equity tier 1 (to risk weighted assets), Actual, Ratio	12.90%	12.20%
Common equity tier 1 (to risk weighted assets), For Capital Adequacy Purposes, Amount	$ 53,471	$ 55,223
Common equity tier 1 (to risk weighted assets), For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Common equity tier 1 (to risk weighted assets), To Be Well Capitalized, Amount	$ 77,236	$ 79,767
Common equity tier 1 (to risk weighted assets), To Be Well Capitalized, Ratio	6.50%	6.50%
Tier 1 leverage ratio (to adjusted total assets), Actual, Amount	$ 153,408	$ 149,982
Tier 1 leverage ratio (to adjusted total assets), Actual, Ratio	0.099	0.104
Tier 1 leverage ratio (to adjusted total assets), For Capital Adequacy Purposes, Amount	$ 61,942	$ 57,834
Tier 1 leverage ratio (to adjusted total assets), For Capital Adequacy Purposes, Ratio	0.040	0.040
Tier 1 leverage ratio (to adjusted total assets), To Be Well Capitalized, Amount	$ 77,427	$ 72,293
Tier 1 leverage ratio (to adjusted total assets), To Be Well Capitalized, Ratio	0.050	0.050
Citizens Community Bancorp, Inc.
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk weighted assets), Actual, Amount	$ 143,353	$ 137,259
Total capital (to risk weighted assets), Actual, Ratio	0.121	0.112
Total capital (to risk weighted assets), For Capital Adequacy Purposes, Amount	$ 95,059	$ 98,174
Total capital (to risk weighted assets), For Capital Adequacy Purposes, Ratio	0.080	0.080
Total capital (to risk weighted assets), To Be Well Capitalized, Amount	$ 118,824	$ 122,718
Total capital (to risk weighted assets), To Be Well Capitalized, Ratio	0.100	0.100
Tier 1 capital (to risk weighted assets), Actual, Amount	$ 114,980	$ 111,939
Tier 1 capital (to risk weighted assets), Actual, Ratio	0.097	0.091
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes, Amount	$ 71,295	$ 73,631
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes, Ratio	0.060	0.060
Tier 1 capital (to risk weighted assets), To Be Well Capitalized, Amount	$ 95,059	$ 998,174
Tier 1 capital (to risk weighted assets), To Be Well Capitalized, Ratio	0.080	0.080
Common equity tier 1 (to risk weighted assets), Actual, Amount	$ 114,980	$ 111,939
Common equity tier 1 (to risk weighted assets), Actual, Ratio	9.70%	9.10%
Common equity tier 1 (to risk weighted assets), For Capital Adequacy Purposes, Amount	$ 53,471	$ 55,223
Common equity tier 1 (to risk weighted assets), For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Common equity tier 1 (to risk weighted assets), To Be Well Capitalized, Amount	$ 77,236	$ 79,767
Common equity tier 1 (to risk weighted assets), To Be Well Capitalized, Ratio	6.50%	6.50%
Tier 1 leverage ratio (to adjusted total assets), Actual, Amount	$ 114,980	$ 111,939
Tier 1 leverage ratio (to adjusted total assets), Actual, Ratio	0.074	0.077
Tier 1 leverage ratio (to adjusted total assets), For Capital Adequacy Purposes, Amount	$ 61,942	$ 57,834
Tier 1 leverage ratio (to adjusted total assets), For Capital Adequacy Purposes, Ratio	0.040	0.040
Tier 1 leverage ratio (to adjusted total assets), To Be Well Capitalized, Amount	$ 77,427	$ 72,293
Tier 1 leverage ratio (to adjusted total assets), To Be Well Capitalized, Ratio	0.050	0.050