Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Commitments and Contingencies [Line Items]
Letters of credit and bank guarantees outstanding, amount	$ 787,000
Letters of credit and bank guarantees collateralized by restricted cash	$ 787,000
Minimum product warranty range	12 months
Maximum product warranty range	24 months
Product warranty offer on sale	3 months
Maximum
Commitments and Contingencies [Line Items]
Operating lease expiration date		2024-03