CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2016	Apr. 03, 2015
Cash flows from operating activities:
Net loss	$ (25,180)	$ (2,657)
Adjustments to reconcile net loss to net cash provided by operating activities:
Amortization of intangibles	2,783	1,907
Depreciation	3,317	3,493
Stock-based compensation	3,094	4,134
Amortization of discount on convertible debt	1,187	0
Restructuring, asset impairment and loss on retirement of fixed assets	1,675	3
Loss on impairment of long-term investment	1,476	2,505
Provision for excess and obsolete inventories	418	454
Allowance for doubtful accounts, returns and discounts	739	(367)
Excess tax benefits from stock-based compensation	0	(120)
Changes in operating assets and liabilities, net of effects of acquisition:
Accounts receivable	(10,894)	(1,353)
Inventories	(51)	775
Prepaid expenses and other assets	(6,078)	(13,062)
Accounts payable	(3,890)	3,380
Deferred revenue	24,963	10,105
Income taxes payable	(13)	(501)
Accrued and other liabilities	1,046	(6,819)
Net cash (used in) provided by operating activities	(5,408)	1,877
Cash flows from investing activities:
Acquisition of business, net of cash acquired	(69,532)	0
Proceeds from maturities of investments	7,394	9,648
Purchases of property and equipment	(2,664)	(3,651)
Purchases of long-term investments	0	(85)
Net cash (used in) provided by investing activities	(64,802)	5,912
Cash flows from financing activities:
Payment of convertible debt issuance costs	(582)	0
Increase in other debts and capital leases	262	0
Repayment of other debts and capital leases	(114)	0
Payments for repurchase of common stock	0	(5,182)
Proceeds from common stock issued to employees	2,074	6,110
Payment of tax withholding obligations related to net share settlements of restricted stock units	(955)	(2,078)
Excess tax benefits from stock-based compensation	0	120
Net cash provided by (used in) financing activities	685	(1,030)
Effect of exchange rate changes on cash and cash equivalents	330	(135)
Net (decrease) increase in cash and cash equivalents	(69,195)	6,624
Cash and cash equivalents at beginning of period	126,190	73,032
Cash and cash equivalents at end of period	$ 56,995	$ 79,656