Note 1 - Summary of Significant Accounting Policies (Details Textual) |
12 Months Ended |
|---|---|
Dec. 31, 2016 | |
| Minimum [Member] | |
| Debt Instrument, Term | 10 years |
| Maximum [Member] | |
| Debt Instrument, Term | 30 years |
| Monroe County, Michigan [Member] | |
| Number of Stores | 14 |
| Wayne County, Michigan [Member] | |
| Number of Stores | 6 |
| Lenawee County, Michigan [Member] | |
| Number of Loan and Wealth Management Offices | 1 |