Other Income (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2016	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Income [Line Items]
Proceeds from Insurance Settlement, Investing Activities		$ 777,000	$ 0	$ 777,000	$ 0
Sale Leaseback Transaction, Net Proceeds, Investing Activities	$ 1,619,000
Other Nonoperating Income		$ 417,000
Other Operating Income (Expense) [Member]
Other Income [Line Items]
Sale Leaseback Transaction, Current Period Gain Recognized	1,415,000
Sale Leaseback Transaction, Deferred Gain, Net	$ 65,000