Balance Sheet Components - Accounts Receivable, Net, Prepaid Expenses and Other Current Assets, Inventories, Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 26, 2014	Dec. 31, 2013
Accounts receivable, net:
Accounts receivable	$ 81,988	$ 83,266
Less: allowances for doubtful accounts, returns and discounts	(6,348)	(8,214)
Accounts receivable, net	75,640	75,052
Inventories:
Raw materials	1,805	2,389
Work-in-process	1,780	976
Finished goods	28,927	33,561
Total inventories, net	32,512	36,926
Property and equipment, net:
Furniture and fixtures	8,796	8,227
Machinery and equipment	117,765	114,178
Leasehold improvements	8,386	7,888
Property and equipment, gross	134,947	130,293
Less: accumulated depreciation and amortization	(104,133)	(95,348)
Property and equipment, net	$ 30,814	$ 34,945