Nature of Business, Basis of Presentation and Significant Accounting Policies - Summary of Other Information Related to Leases (Details) $ in Thousands	9 Months Ended
	Sep. 28, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used by operating leases	$ 2,553
Right of use assets recognized in exchange for operating lease liabilities	779
Imputed interest - operating leases	$ 381
Weighted average remaining lease term - operating leases (months)	53 months
Weighted average discount rate - operating leases (per annum)	4.91%