Acquisition (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Jul. 01, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs		$ 300
Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized		11,200
Restructuring and Related Cost, Expected Cost		600
GemGroup Inc [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Jul. 01, 2014
Escrow Deposit	$ 2,000
Payments to Acquire Businesses, Gross	19,750
Business Combination, Consideration Transferred, Liabilities Incurred		$ 266
Business Combination, Consideration Transferred	$ 20,016