CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income	$ 4,040	$ 8,774
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation of property, plant, and equipment	2,759	2,398
Amortization of intangibles		171
Accretion/Amortization of investments available for sale	(286)	(1,824)
Deferred income taxes	60	75
Change in net pension liability	(146)	(627)
Loss on disposal of property and equipment	26	24
Stock-based compensation expense	15,381	14,488
Change in asset retirement obligation	20	(107)
Provision for sales returns and bad debts	1,079	1,004
Inventory provision	1,024	3,630
Changes in working capital:
Accounts receivable	436	(32,344)
Inventories	(4,871)	(4,382)
Prepayments, deposits, and other assets	(7,085)	(2,665)
Accounts payable	3,618	(1,447)
Other current liabilities	(4,788)	1,432
Net cash provided by (used in) operating activities	11,267	(11,400)
Cash flows from investing activities:
Acquisition of property and equipment	(11,438)	(5,915)
Purchase of investments available for sale	(20,249)	(42,602)
Proceeds from sale or maturity of investments available for sale	27,206	68,622
Net cash provided by (used in) investing activities	(4,481)	20,105
Cash flows from financing activities:
Repayment of finance lease obligations	(82)	(82)
Repurchase of employee common stock for taxes withheld	(1,396)	(1,984)
Proceeds from the exercise of stock options	5,695	2,006
Proceeds from vested restricted and performance stock units	2	1
Net cash provided by (used in) financing activities	4,219	(59)
Effect of exchange rate changes on cash and cash equivalents	(1,267)	(431)
Increase in cash and cash equivalents	9,738	8,215
Cash and cash equivalents, at beginning of the period	183,038	86,480
Cash and cash equivalents, at end of the period	$ 192,776	$ 94,695