Nature of Business, Basis of Presentation and Significant Accounting Policies - Schedule of New Accounting Standards Adoption Impacts Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Accounting Policies [Line Items]
Net Revenue	$ 76,590	$ 56,675	$ 247,507	$ 180,416
Net income	$ 11,568	$ 5,764	$ 45,624	$ 19,404
Net income per share:
Basic (in dollars per share)	$ 0.48	$ 0.23	$ 1.90	$ 0.77
Diluted (in dollars per share)	$ 0.47	$ 0.22	$ 1.86	$ 0.75
Calculated under Revenue Guidance in Effect before Topic 606 | Topic 606 Adoption [Member]
Accounting Policies [Line Items]
Net Revenue	$ 77,478		$ 244,668
Net income	$ 12,169		$ 43,779
Net income per share:
Basic (in dollars per share)	$ 0.51		$ 1.82
Diluted (in dollars per share)	$ 0.50		$ 1.78
Effect of Change Higher/(Lower) [Member] | Topic 606 Adoption [Member]
Accounting Policies [Line Items]
Net Revenue	$ (888)		$ 2,839
Net income	$ (601)		$ 1,845
Net income per share:
Basic (in dollars per share)	$ (0.03)		$ 0.08
Diluted (in dollars per share)	$ (0.03)		$ 0.08