CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) $ in Thousands	9 Months Ended
	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)
Cash flows from operating activities:
Net loss	$ (19,201)	$ (63,349)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	30,740	45,591
Impairment of acquired intangible assets	12,486	36,198
Amortization of debt issuance costs and discount	1,847	1,680
(Gain) loss on sale or maturity of marketable securities	(18)	237
Gain on forward contracts	(105)	(72)
Stock-based compensation expense	9,908	9,286
Gain on disposal of fixed assets	(135)	(197)
Gain on sale of building	0	(4,624)
Loss on sale of assets and business units	0	1,496
Impairment of cost-method investment	266	692
Changes in assets and liabilities:
Accounts receivable, net	(18,736)	20,687
Inventories	13,892	1,519
Prepaid expenses and other assets	(11,729)	3,839
Accounts payable and accrued expenses (includes restructuring)	1,661	(17,901)
Accrued payroll obligations	(557)	(2,002)
Income taxes payable	309	(711)
Deferred income	0
Net cash provided by operating activities	20,560	35,746
Cash flows from investing activities:
Proceeds from sales of and maturities of short-term marketable securities	5,000	9,689
Purchases of marketable securities	(9,603)	(7,420)
Proceeds from sale of building	0	7,895
Cash paid for costs of sale of building	0	(1,004)
Capital expenditures	(6,178)	(12,325)
Proceeds from sale of assets and business units	0	967
Short-term loan to cost-method investee	0	(2,000)
Cash paid for software licenses	(6,144)	(6,472)
Net cash used in investing activities	(16,925)	(10,670)
Cash flows from financing activities:
Restricted stock unit tax withholdings	(1,600)	(2,787)
Proceeds from issuance of common stock	28,051	3,452
Repayment of debt	(27,884)	(33,679)
Net cash used in financing activities	(1,433)	(33,014)
Effect of exchange rate change on cash	(1,124)	1,381
Net increase (decrease) in cash and cash equivalents	1,078	(6,557)
Beginning cash and cash equivalents	106,815	106,552
Ending cash and cash equivalents	107,893	99,995
Supplemental cash flow information:
Change in unrealized gain (loss) related to marketable securities, net of tax, included in Accumulated other comprehensive loss	(16)	72
Income taxes paid, net of refunds	2,716	2,308
Interest paid	13,976	16,379
Accrued purchases of plant and equipment	332	51
Note receivable resulting from sale of assets and business units	0
Product
Changes in assets and liabilities:
Deferred income	0	3,862
Licensing and services
Changes in assets and liabilities:
Deferred income	$ (68)	$ (485)