CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net (loss) income	$ (4,404)	$ 7,576
Adjustments to reconcile net income to net cash and cash equivalents provided by (used in) operating activities:
Amortization of intangibles	13,732	387
Depreciation	3,103	1,254
Share-based compensation	3,955	2,163
Acquired inventory step-up amortization	9,898
Provision for doubtful accounts and inventory valuation	928	1,028
Other, net	(144)	(381)
Changes in operating assets and liabilities	(18,170)	(13,593)
Net cash and cash equivalents provided by (used in) operating activities	8,898	(1,566)
Cash flows from investing activities:
Purchases of marketable securities	(76,460)	(22,142)
Proceeds from sales of marketable securities	74,857	14,295
Purchases of property, plant and equipment	(997)	(1,320)
Net cash and cash equivalents used in investing activities	(2,600)	(9,167)
Cash flows from financing activities:
Purchase of common stock	(33,614)	(744)
Tax payments related to shares withheld for share-based compensation plans	(1,565)	(598)
Issuance of shares through share-based compensation plans	164
Net cash and cash equivalents used in financing activities	(35,015)	(1,342)
Effect of exchange rate changes on cash and cash equivalents	(636)	(145)
Net decrease in cash and cash equivalents	(29,353)	(12,220)
Cash and cash equivalents at beginning of period	130,673	112,388
Cash and cash equivalents at end of period	101,320	100,168
Supplemental disclosure of cash flow information:
Income taxes paid	$ 588	$ 114