Common Stock Rights Offering (Details) - USD ($)				1 Months Ended	6 Months Ended		12 Months Ended
	Mar. 21, 2017	Mar. 20, 2017	Feb. 14, 2016	Mar. 31, 2017	Jun. 30, 2017	Jun. 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