Nature of Business, Basis of Presentation and Significant Accounting Policies - Summary of Other Information Related to Leases (Details) $ in Thousands	6 Months Ended
	Jun. 29, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used by operating leases	$ 1,582
Right of use assets recognized in exchange for operating lease liabilities	698
Imputed interest - operating leases	$ 254
Weighted average remaining lease term - operating leases (months)	61 months
Weighted average discount rate - operating leases (per annum)	4.88%