Balance Sheet Components - Accounts Receivable, Net, Prepaid Expenses and Other Current Assets, Inventories, Property and Equipment, Net (Detail) - USD ($) $ in Thousands		Oct. 02, 2015		Apr. 03, 2015	Dec. 31, 2014
Accounts receivable, net:
Accounts receivable		$ 67,304			$ 81,201
Less: allowances for doubtful accounts, returns and discounts		(3,176)			(7,057)
Total		64,128			74,144
Prepaid expenses and other current assets:
Prepaid inventories to contract manufacturer(1)		14,200	[1]	$ 14,200	0	[1]
Prepaid software license to Vislink(2)	[2]	0			1,233
Other Prepayments		10,963			9,713
Deferred cost of revenue		2,794			2,524
Income tax receivable		1,914			2,316
Restricted cash(3)	[3]	1,091
Other		747			1,753
Prepaid Expense and Other Assets, Current		31,709			17,539
Inventories:
Raw materials		2,400			1,422
Work-in-process		1,526			1,255
Finished goods		35,947			30,070
Total inventories, net		39,873			32,747
Property and equipment, net:
Furniture and fixtures		7,820			7,691
Machinery and equipment		120,067			116,031
Leasehold improvements		10,307			8,140
Property and equipment, gross		138,194			131,862
Less: accumulated depreciation and amortization		(111,575)			(104,641)
Property and equipment, net		$ 26,619			$ 27,221

[1] During the first quarter of 2015, the Company made a $14.2 million advance payment for future inventory requirements to a supplier in order to secure more favorable pricing. The Company anticipates that this amount will begin to offset in the fourth quarter of 2015 through the second quarter of 2016 against the accounts payable owed to this supplier.

[2] The prepaid inventories were related to prepayment for software licenses made to Vislink (see Note 4, “Investments in Other Equity Securities” for additional information on Vislink).

[3] The Company has restricted cash of $0.5 million that serves as collateral for rent guarantees on certain operating leases in Israel. Additionally, the Company holds $0.6 million of restricted cash as collateral for its corporate card credit facility in Switzerland. These restricted funds are invested in bank deposits and cannot be withdrawn from the Company’s accounts without the prior written consent of the applicable secured party.