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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2022 | Oct. 01, 2021
Cash flows from operating activities: |  |
Net income | $ 32,902 | $ 19,579
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation of property, plant, and equipment | 3,101 | 2,671
Amortization of intangibles | 22 | 26
Accretion/Amortization of investments available for sale | (307) |
Deferred income taxes | 23 | 845
Change in net pension liability | 40 | 91
Loss on disposal of property and equipment |  | 2
Stock-based compensation expense | 15,375 | 10,985
Provision for sales returns and bad debts | 361 | 1,069
Inventory provision | 2,020 | 1,097
Changes in working capital: |  |
Accounts receivable | (13,108) | (7,072)
Inventories | (4,123) | 1,301
Prepayments, deposits, and other current assets | 526 | 1,288
Accounts payable | (1,834) | (40)
Other current liabilities | (2,253) | 3,622
Net cash provided by operating activities | 32,745 | 35,464
Cash flows from investing activities: |  |
Acquisition of property and equipment | (14,083) | (8,956)
Purchase of investments available for sale | (95,576) |
Net cash used in investing activities | (109,659) | (8,956)
Cash flows from financing activities: |  |
Repayment of finance lease obligations | (85) | (314)
Proceeds from the exercise of stock options | 8,179 | 18,322
Proceeds from vested restricted stock | 1 | 1
Net cash provided by financing activities | 8,095 | 18,009
Effect of exchange rate changes on cash and cash equivalents | (1,645) | (724)
Increase (decrease) in cash and cash equivalents | (70,464) | 43,793
Cash and cash equivalents, at beginning of the period | 199,706 | 152,453
Cash and cash equivalents, at end of the period | $ 129,242 | $ 196,246

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