CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2021	Oct. 02, 2020
Cash flows from operating activities:
Net income	$ 19,579	$ 2,586
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, plant, and equipment	2,671	2,276
Amortization of intangibles	26	26
Deferred income taxes	845	(1,215)
Change in net pension liability	91	522
Loss on disposal of property and equipment	2	3
Stock-based compensation expense	10,985	8,965
Provision for sales returns and bad debts	1,069	815
Inventory provision	1,097	1,195
Changes in working capital:
Accounts receivable	(7,072)	(10,975)
Inventories	1,301	(1,353)
Prepayments, deposits, and other current assets	1,288	(636)
Accounts payable	(40)	(657)
Other current liabilities	3,622	(151)
Net cash provided by operating activities	35,464	1,401
Cash flows from investing activities:
Acquisition of property and equipment	(8,956)	(6,259)
Net cash used in investing activities	(8,956)	(6,259)
Cash flows from financing activities:
Repayment of finance lease obligations	(314)	(455)
Repayment on line of credit		(511)
Proceeds from the exercise of stock options	18,322	13,986
Proceeds from vested restricted stock	1	1
Net cash provided by financing activities	18,009	13,021
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(724)	207
Increase in cash, cash equivalents and restricted cash	43,793	8,370
Cash and cash equivalents, at beginning of the period	152,453	119,968
Cash and cash equivalents, at end of the period	$ 196,246	$ 128,338