Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Cash flows from operating activities:
Net income (loss)	$ 47,392	$ 43,493	$ (26,322)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,140	33,056	39,261
Stock-based compensation expense	40,372	18,899	13,646
Amortization of right-of-use assets	5,960	5,797	0
Amortization of debt issuance costs and discount	400	1,659	2,230
Loss on refinancing of long-term debt	0	2,235	0
Impairment of operating lease right-of-use asset	0	977	0
Impairment of acquired intangible assets	0	0	12,486
Other non-cash adjustments	(256)	(374)	(79)
Changes in assets and liabilities:
Accounts receivable, net	336	(4,027)	(3,978)
Inventories, net	(9,619)	12,116	13,177
Prepaid expenses and other assets	(6,441)	3,740	(11,667)
Accounts payable	(16,820)	12,470	(3,470)
Accrued expenses	5,715	(3,209)	16,795
Accrued payroll obligations	4,624	4,039	(1,051)
Operating lease liabilities, current and long-term portions	(5,715)	(6,896)	0
Income taxes payable	599	162	498
Deferred licensing and services revenue	0	0	(68)
Net cash provided by operating activities	91,687	124,137	51,458
Cash flows from investing activities:
Capital expenditures	(12,121)	(15,590)	(8,384)
Cash paid for software licenses	(8,747)	(9,601)	(8,123)
Proceeds from sales of and maturities of short-term marketable securities	0	9,655	5,000
Purchases of marketable securities	0	0	(9,603)
Net cash used in investing activities	(20,868)	(15,536)	(21,110)
Cash flows from financing activities:
Restricted stock unit tax withholdings	(26,965)	(10,084)	(2,370)
Proceeds from issuance of common stock	10,103	17,166	29,288
Purchases of treasury stock	(14,989)	0	0
Proceeds from long-term debt	50,000	206,500	0
Original issue discount and debt issuance costs	0	(2,086)	0
Repayment of long-term debt	(26,250)	(321,408)	(43,759)
Net cash used in financing activities	(8,101)	(109,912)	(16,841)
Effect of exchange rate change on cash	1,533	341	(1,271)
Net increase (decrease) in cash and cash equivalents	64,251	(970)	12,236
Beginning cash and cash equivalents	118,081	119,051	106,815
Ending cash and cash equivalents	182,332	118,081	119,051
Supplemental disclosure of cash flow information and non-cash investing and financing activities:
Interest paid	3,700	10,995	18,607
Operating lease payments	7,713	8,425	0
Income taxes paid, net of refunds	1,868	3,393	3,054
Accrued purchases of plant and equipment	975	826	110
Operating lease right-of-use assets obtained in exchange for lease obligations	$ 2,645	$ 747	$ 0