Leases - Balance Sheet Components (Details) - USD ($) $ in Thousands	Jun. 26, 2021	Dec. 31, 2020
Leases [Abstract]
Right-of-use assets	$ 14,084	$ 15,847
Lease liabilities, current	5,301	4,886
Lease liabilities, non-current	$ 9,922	$ 11,974
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets	Other Assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued and other current liabilities (Note 6)	Accrued and other current liabilities (Note 6)
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Long-Term Liabilities	Other Long-Term Liabilities