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Note 11 - Other Borrowings and Unused Lines of Credit (Details) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Feb. 12, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Other borrowings |  | $ 72,032,318 | $ 66,000,000
Interest rate (as a percent) |  | 4.94% | 3.82%
Revolving line of credit |  |  |
Other borrowings |  | $ 9,000,000 |
Interest rate (as a percent) |  | 5.02% |
London Interbank Offered Rate (LIBOR) |  |  |
Variable interest rate (as a percent) | 282.00% |  |
London Interbank Offered Rate (LIBOR) | Revolving line of credit |  |  |
Variable interest rate (as a percent) |  | 2.50% |
Term Note 1 |  |  |
Other borrowings |  | $ 18,000,000 | $ 24,000,000
Interest rate (as a percent) |  | 5.52% | 4.56%
Term Note 1 | London Interbank Offered Rate (LIBOR) |  |  |
Variable interest rate (as a percent) |  | 3.00% |
Term Note 2 |  |  |
Other borrowings |  | $ 5,300,000 | $ 7,000,000
Interest rate (as a percent) |  | 5.52% | 4.56%
Term Note 2 | London Interbank Offered Rate (LIBOR) |  |  |
Variable interest rate (as a percent) |  | 3.00% |
Term notes |  |  |
Other borrowings |  | $ 23,250,000 | $ 31,000,000
Periodic payment of principal amount |  | $ 1,937,500 |

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