Nature of Business, Basis of Presentation and Significant Accounting Policies - Summary of Other Information Related to Leases (Details) $ in Thousands	3 Months Ended
	Mar. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used by operating leases	$ 789
Right of use assets recognized in exchange for operating lease liabilities	698
Imputed interest - operating leases	$ 120
Weighted average remaining lease term - operating leases (months)	62 months
Weighted average discount rate - operating leases (per annum)	4.86%