Equity, Regulatory Capital and Dividend Restrictions (Details) - Wells Federal Bank - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier I capital (to average assets), Actual Amount	$ 28,734	$ 25,380
Tier I capital (to average assets), Minimum for Capital Adequacy Purposes, Amount	10,967	10,255
Tier I capital (to average assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 13,709	$ 12,819
Tier I capital (to average assets), Actual Percent	10.48%	9.90%
Tier I capital (to average assets), Minimum for Capital Adequacy Purposes, Percent	4.00%	4.00%
Tier I capital (to average assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Percent	5.00%	5.00%
Common equity Tier I capital (to risk weighted assets), Actual Amount	$ 28,734
Common equity Tier I capital (to risk weighted assets), Minimum for Capital Adequacy Purposes, Amount	8,884
Common equity Tier I capital (to risk weighted assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 12,832
Common equity Tier I capital (to risk weighted assets), Actual Percent	14.56%
Common equity Tier I capital (to risk weighted assets), Minimum for Capital Adequacy Purposes, Percent	4.50%
Common equity Tier I capital (to risk weighted assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Percent	6.50%
Tier I capital (to risk weighted assets), Actual Amount	$ 28,734	$ 25,380
Tier I capital (to risk weighted assets), Minimum for Capital Adequacy Purposes, Amount	11,845	7,478
Tier I capital (to risk weighted assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 15,793	$ 11,217
Tier I capital (to risk weighted assets), Actual Percent	14.56%	13.58%
Tier I capital (to risk weighted assets), Minimum for Capital Adequacy Purposes, Percent	6.00%	4.00%
Tier I capital (to risk weighted assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Percent	8.00%	6.00%
Total risk based capital (to risk weighted assets), Actual Amount	$ 30,722	$ 27,566
Total risk based capital (to risk weighted assets), Minimum for Capital Adequacy Purposes, Amount	15,793	14,956
Total risk based capital (to risk weighted assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 19,742	$ 18,695
Total risk based capital (to risk weighted assets), Actual Percent	15.56%	14.74%
Total risk based capital (to risk weighted assets), Minimum for Capital Adequacy Purposes, Percent	8.00%	8.00%
Total risk based capital (to risk weighted assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Percent	10.00%	10.00%