Regulatory Capital Matters (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($) item	Dec. 31, 2016 USD ($)
Regulatory capital matters
Number of classifications for prompt corrective action regulations | item	5
Capital conservation buffer (as a percent)	1.25%
Tier one risk based minimum required capital conservation	2.50%
Total Capital (to Risk-Weighted Assets)
Actual, Amount	$ 50,225	$ 48,671
For Capital Adequacy Purposes, Amount	$ 31,711	$ 30,848
Total Capital (to Risk-Weighted Assets)
Actual, Ratio (as a percent)	12.68%	12.62%
For Capital Adequacy Purposes, Ratio (as a percent)	8.00%	8.00%
Tier I Capital (to Risk-Weighted Assets)
Actual, Amount	$ 45,327	$ 43,852
For Capital Adequacy Purposes, Amount	$ 23,783	$ 23,136
Tier I Capital (to Risk-Weighted Assets)
Actual, Ratio (as a percent)	11.44%	11.37%
For Capital Adequacy Purposes, Ratio (as a percent)	6.00%	6.00%
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
Actual Amount	$ 40,327	$ 31,585
For Capital Adequacy Purposes, Amount	$ 17,835	$ 17,352
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
Actual, Ratio (as a percent)	10.18%	8.19%
For Capital Adequacy Purposes, Ratio (as a percent)	4.50%	4.50%
Tier I Leverage Capital to Average Assets
Actual, Amount	$ 45,327	$ 43,852
For Capital Adequacy Purposes, Amount	$ 18,015	$ 17,600
Tier I Capital (to Average Assets)
Actual, Ratio (as a percent)	10.06%	9.97%
For Capital Adequacy Purposes, Ratio (as a percent)	4.00%	4.00%
Citizens First Bank, Inc.
Total Capital (to Risk-Weighted Assets)
Actual, Amount	$ 49,973	$ 48,316
For Capital Adequacy Purposes, Amount	31,688	30,843
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 39,610	$ 38,554
Total Capital (to Risk-Weighted Assets)
Actual, Ratio (as a percent)	12.62%	12.53%
For Capital Adequacy Purposes, Ratio (as a percent)	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	10.00%	10.00%
Tier I Capital (to Risk-Weighted Assets)
Actual, Amount	$ 45,075	$ 43,497
For Capital Adequacy Purposes, Amount	23,766	23,132
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 31,688	$ 30,843
Tier I Capital (to Risk-Weighted Assets)
Actual, Ratio (as a percent)	11.38%	11.28%
For Capital Adequacy Purposes, Ratio (as a percent)	6.00%	6.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
Actual Amount	$ 45,075	$ 43,497
For Capital Adequacy Purposes, Amount	17,825	17,349
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 25,747	$ 25,060
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
Actual, Ratio (as a percent)	11.38%	11.28%
For Capital Adequacy Purposes, Ratio (as a percent)	4.50%	4.50%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	6.50%	6.50%
Tier I Leverage Capital to Average Assets
Actual, Amount	$ 45,075	$ 43,497
For Capital Adequacy Purposes, Amount	18,133	17,600
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 22,666	$ 22,000
Tier I Capital (to Average Assets)
Actual, Ratio (as a percent)	9.94%	9.89%
For Capital Adequacy Purposes, Ratio (as a percent)	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	5.00%	5.00%