Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 30, 2018
Lessee, Lease, Description [Line Items]
Fixed operating lease expenses	$ 7,700
Rental expense		$ 8,300	$ 8,900
Leases renewal term (up to)	5 years
Leases termination period (within)	1 year
Operating leases, the weighted-average remaining lease term	5 years 8 months 12 days
Operating leases, weighted-average discount rate	7.00%
Operating lease right-of-use assets	$ 23,591	0
Total lease liabilities	26,124	$ 0
Operating leases obligation for previously restructured facilities	$ 6,600
Minimum
Lessee, Lease, Description [Line Items]
Leases remaining term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Leases remaining term	8 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets				$ 29,900
Total lease liabilities				$ 32,300