Stockholders' Equity, Regulatory Capital and Dividend Restrictions (Details) - Wells Federal Bank - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier I capital (to average assets), Actual Amount	$ 28,221	$ 25,380
Tier I capital (to average assets), Minimum for Capital Adequacy Purposes, Amount	10,884	10,255
Tier I capital (to average assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 13,605	$ 12,819
Tier I capital (to average assets), Actual Percent	10.37%	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%
Tier I capital common equity (to risk weighted assets), Actual Amount	$ 28,221
Tier I capital common equity (to risk weighted assets), Minimum for Capital Adequacy Purposes, Amount	11,166
Tier I capital common equity (to risk weighted assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 16,129
Tier I capital common equity (to risk weighted assets), Actual Percent	11.37%
Tier I capital common equity (to risk weighted assets), Minimum for Capital Adequacy Purposes, Percent	4.50%
Tier I capital common equity (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	$ 28,221	$ 25,380
Tier I capital (to risk weighted assets), Minimum for Capital Adequacy Purposes, Amount	14,889	7,478
Tier I capital (to risk weighted assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 19,851	$ 11,217
Tier I capital (to risk weighted assets), Actual Percent	11.37%	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	$ 30,384	$ 27,566
Total risk based capital (to risk weighted assets), Minimum for Capital Adequacy Purposes, Amount	19,851	14,956
Total risk based capital (to risk weighted assets), Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 24,814	$ 18,695
Total risk based capital (to risk weighted assets), Actual Percent	12.24%	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%