Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Commitments and Contingencies [Line Items]
Deferred rent, included in other long-term liabilities	$ 2,392	$ 1,190
Tenant improvement allowance	1,700
Standby letter of credit for lease	1,000
Restricted cash	1,602	1,780
Gross rental expense	3,800	$ 4,000	$ 3,800
Letters of credit and bank guarantees outstanding, amount	1,600
Letters of credit and bank guarantees collateralized by restricted cash	$ 1,600
Minimum product warranty range	12 months
Maximum product warranty range	24 months
Product warranty offer on sale	3 months
Pledged as Collateral for Standby Letter of Credit
Commitments and Contingencies [Line Items]
Restricted cash	$ 1,000
Maximum
Commitments and Contingencies [Line Items]
Operating lease expiration date	2024-03