Significant Accounting Policies - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 26, 2020 USD ($)	Dec. 28, 2019 USD ($)	Dec. 29, 2018 USD ($)
Significant Accounting Policies [Line Items]
Contractual support period	1 year
Stock plan offering period	6 months
Expected dividend yield	0.00%
Advertising expenses	$ 1.3	$ 1.5	$ 0.9
Foreign currency transaction loss	0.2	3.7	2.5
Revenue reserves recorded for potential sales returns	$ 2.4	$ 3.5	$ 4.3
Software warranty period	90 days
Lease renewal term	6 years
Restructuring payment timing period	4 years
Customer Concentration Risk | Revenue | Customer One
Significant Accounting Policies [Line Items]
Concentration risk	11.00%	13.00%	13.00%
Customer Concentration Risk | Revenue | Customer Two
Significant Accounting Policies [Line Items]
Concentration risk			15.00%
Restricted Stock Units | New Hire Employee
Significant Accounting Policies [Line Items]
Award vesting period	4 years
Performance Stock Units
Significant Accounting Policies [Line Items]
Award performance period	3 years
Vesting 1 | Restricted Stock Units | Existing Employees
Significant Accounting Policies [Line Items]
Award vesting period	2 years
Vesting 1 | Performance Stock Units | Existing Employees
Significant Accounting Policies [Line Items]
Award vesting period	1 year
Vesting 2 | Restricted Stock Units | Existing Employees
Significant Accounting Policies [Line Items]
Award vesting period	3 years
Vesting 2 | Performance Stock Units | Existing Employees
Significant Accounting Policies [Line Items]
Award vesting period	2 years
Vesting 3 | Restricted Stock Units | Existing Employees
Significant Accounting Policies [Line Items]
Award vesting period	4 years
Vesting 3 | Performance Stock Units | Existing Employees
Significant Accounting Policies [Line Items]
Award vesting period	3 years
Minimum
Significant Accounting Policies [Line Items]
Payment term	30 days
Purchase commitment time frame	12 months
Product warranty period	1 year
Lease term	1 year
Minimum | Performance Stock Units
Significant Accounting Policies [Line Items]
Ranges of number of shares issued on vesting of PSUs	0
Maximum
Significant Accounting Policies [Line Items]
Payment term	120 days
Purchase commitment time frame	24 months
Product warranty period	5 years
Lease term	11 years
Maximum | Performance Stock Units
Significant Accounting Policies [Line Items]
Ranges of number of shares issued on vesting of PSUs	2