Acquisition (Details Textual)	1 Months Ended	12 Months Ended
	Dec. 16, 2016 USD ($) ft²	Dec. 29, 2016 USD ($)
Business Acquisition [Line Items]
Business Acquisition Revenue Reported By Acquired Entity		$ 5,111,000
Business Acquisition Operating Income Reported By Acquired Entity		(450,000)
Area of Land | ft²	84,000
Business Combination, Consideration Transferred	$ 65,000,000
Business Acquisition, Transaction Costs		2,037,000
Business Acquisition, Pro Forma Revenue		$ 607,934,000