Common Stock Rights Offering (Details) - USD ($) |
1 Months Ended | 9 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|
Mar. 21, 2017 |
Mar. 20, 2017 |
Feb. 14, 2016 |
Mar. 31, 2017 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Dec. 31, 2016 |
|
| Shares of common stock sold in rights offering | 783,626 | 7,067,000 | 6,269,000 | ||||
| Subscription price of common shares sold in rights offering | $ 11.93 | ||||||
| Proceeds from common stock rights offering, gross | $ 9,349,000 | $ 0 | |||||
| Net proceeds from issuance of common stock | $ 9,200,000 | ||||||
| Offering-related expenses | $ 144,667 | 158,000 | $ 0 | ||||
| Preferred stock redemption | $ 10,000,000 | $ 10,000,000 | |||||
| Repayment of Trust Preferred subordinated debentures | $ 10,800,000 | ||||||
| Series A Preferred Stock [Member] | |||||||
| Preferred stock redemption | $ 10,000,000 | $ 10,000,000 | $ 10,000,000 | ||||