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Share Repurchase Program (Detail Textuals) - Share Repurchase Program - USD ($)		3 Months Ended	9 Months Ended	17 Months Ended
	Mar. 09, 2017	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2017	Apr. 26, 2016
Equity, Class of Treasury Stock [Line Items]
Maximum amount of common stock authorized to repurchase					$ 10,000,000
Repurchase common stock (in shares)		116,572	879,216	1,570,017
Repurchase common stock		$ 600,000	$ 4,200,000	$ 7,900,000
Privately negotiated transaction included in stock repurchase program
Equity, Class of Treasury Stock [Line Items]
Repurchase common stock (in shares)			210,000
Richard P. Moberg
Equity, Class of Treasury Stock [Line Items]
Repurchase common stock (in shares)	210,000
Discount on the market closing price	10.00%
Closing price of common stock before discount (in dollars per share)	$ 4.85
Closing price of common stock after discount (in dollars per share)	$ 4.36
Repurchase common stock	$ 915,600