Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Income Taxes [Line Items]
Accrued interest and penalty	$ 0
Ending balance of unrecognized tax benefits	1,220,000	$ 1,192,000	$ 1,155,000
Unrecognized tax benefits recognition impact on income tax rate	$ 0
Earliest Tax Year
Income Taxes [Line Items]
Open Tax Year	2012
Latest Tax Year
Income Taxes [Line Items]
Open Tax Year	2020
Federal
Income Taxes [Line Items]
Net operating loss	$ 47,700,000
Net operating loss expiration year	2033
Federal | Research Tax Credit Carryforward
Income Taxes [Line Items]
Research credit	$ 2,000,000
State
Income Taxes [Line Items]
Net operating loss	$ 23,300,000
Net operating loss expiration year	2021
State | Research Tax Credit Carryforward
Income Taxes [Line Items]
Research credit	$ 2,900,000