CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 27, 2024	Sep. 29, 2023
Cash flows from operating activities:
Net income	$ 14,020	$ 13,591
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation of property, plant, and equipment	4,516	3,743
Amortization of intangibles		169
Accretion/Amortization of investments available for sale	(410)	(2,172)
Deferred income taxes	47	65
Change in net pension liability	(162)	(766)
Loss on disposal of property and equipment	1,668	41
Stock-based compensation expense	22,541	23,334
Change in asset retirement obligation	24	(104)
Provision for sales returns and bad debts	1,947	1,925
Inventory provision	1,873	4,090
Changes in working capital:
Accounts receivable	(9,703)	(50,436)
Inventories	(5,962)	(9,975)
Prepayments, deposits, and other assets	(12,237)	(3,584)
Accounts payable	(2,031)	(3,266)
Other current liabilities	(1,048)	5,970
Net cash provided by (used in) operating activities	15,083	(17,375)
Cash flows from investing activities:
Acquisition of property and equipment	(17,669)	(15,100)
Purchase of investments available for sale	(61,194)	(52,314)
Proceeds from sale or maturity of investments available for sale	39,141	119,359
Net cash provided by (used in) investing activities	(39,722)	51,945
Cash flows from financing activities:
Repayment of finance lease obligations	(124)	(121)
Repurchase of employee common stock for taxes withheld	(1,396)	(2,096)
Proceeds from the exercise of stock options	7,352	9,264
Proceeds from vested restricted and performance stock units	2	1
Net cash provided by financing activities	5,834	7,048
Effect of exchange rate changes on cash and cash equivalents	(230)	(666)
Increase (decrease) in cash and cash equivalents	(19,035)	40,952
Cash and cash equivalents, at beginning of the year	183,038	86,480
Cash and cash equivalents, at end of the period	$ 164,003	$ 127,432