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Stockholders' Equity (Narrative) (Details) - USD ($) | Jun. 30, 2018 | May 16, 2018 | Apr. 17, 2018
--- | --- | --- | ---
IA Bancorp [Member] | Common Stock [Member] |  |  |
Shares issued upon conversion |  | 82,950 |
IA Bancorp [Member] | Series E Preferred Stock [Member] |  |  |
Conversion of stock, shares converted |  | 438,889 |
Common Stock [Member] |  |  |
Stock issued in acquisition | $ 9,952,000 |  |
Common Stock [Member] | IA Bancorp [Member] |  |  |
Stock issued in acquisition |  |  | $ 631,896
Series E Preferred Stock [Member] | IA Bancorp [Member] |  |  |
Stock issued in acquisition |  |  | $ 438,889
Preferred stock, dividend rate |  |  | 6.00%
Series F Preferred Stock [Member] | IA Bancorp [Member] |  |  |
Stock issued in acquisition |  |  | $ 6,465

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