CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income	$ 38,843	$ 13,105
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	18,964	18,887
Stock-based compensation expense	20,118	19,065
Other	1,607	337
Deferred income taxes	441	146
Foreign currency transaction (gain) loss	2,300	(2,248)
Changes in operating assets and liabilities:
Accounts receivable, net	7,933	12,081
Inventories, net	86,814	27,979
Other assets	(5,433)	(2,095)
Accounts payable and accrued expenses	(111,227)	(75,692)
Accrued compensation	(6,205)	(9,340)
Deferred revenue	4,562	3,659
Other liabilities	6,388	(1,297)
Net cash provided by operating activities	65,105	4,587
Cash flows from investing activities
Purchases of property and equipment	(8,087)	(21,870)
Net cash used in investing activities	(8,087)	(21,870)
Cash flows from financing activities
Proceeds from borrowings, net of borrowing costs	0	30,000
Repayments of borrowings	0	(30,000)
Payments for purchase of treasury stock	(566)	(792)
Proceeds from exercise of common stock options	18,947	4,356
Payments of offering costs	(585)	(1,288)
Net cash provided by financing activities	17,796	2,276
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(475)	2,224
Net increase (decrease) in cash, cash equivalents and restricted cash	74,339	(12,783)
Cash, cash equivalents and restricted cash
Beginning of period	221,120	130,788
End of period	295,459	118,005
Supplemental disclosure
Cash paid for interest	1,244	2,383
Cash paid for taxes, net of refunds	1,941	503
Supplemental disclosure of non-cash investing and financing activities
Purchases of property and equipment in accounts payable and accrued expenses	2,426	3,133
Deferred offering costs in accounts payable and accrued expenses	$ 0	$ 1,125