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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Jan. 01, 2021 | Jan. 03, 2020
Cash flows from operating activities: |  |  |
Net income | $ 24,501 | $ 5,913 | $ 14,048
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation of property, plant, and equipment | 3,608 | 3,060 | 3,665
Amortization of intangibles | 34 | 35 | 34
Deferred income taxes | 1,495 | (849) | (3,481)
Change in net pension liability | 137 | 656 | 359
Loss on disposal of property and equipment | 2 | 213 | 14
Stock-based compensation expense | 14,605 | 12,146 | 10,547
Provision for sales returns and bad debts | 318 | 835 | 275
Inventory provision | 1,654 | 1,706 | 1,580
Changes in working capital: |  |  |
Accounts receivable | (8,868) | (3,974) | (4,502)
Inventories | 66 | (1,390) | (950)
Prepayments, deposits, and other current assets | (711) | (3,753) | (1,313)
Accounts payable | 108 | (1,199) | 1,084
Other current liabilities | 7,013 | 7,552 | 4,435
Net cash provided by operating activities | 43,962 | 20,951 | 25,795
Cash flows from investing activities: |  |  |
Acquisition of property and equipment | (13,645) | (8,404) | (10,095)
Acquisition of patents and licenses |  |  | (83)
Net cash used in investing activities | (13,645) | (8,404) | (10,178)
Cash flows from financing activities: |  |  |
Repayment of finance lease obligations | (348) | (561) | (1,294)
Repayment of line of credit | 1,297 | 515 | 2,018
Proceeds from the exercise of stock options | 19,437 | 20,646 | 3,459
Proceeds from vested restricted stock | 1 | 1 | 2
Net cash provided by financing activities | 17,793 | 19,571 | 149
Effect of exchange rate changes on cash and cash equivalents | (857) | 367 | 203
Increase in cash and cash equivalents | 47,253 | 32,485 | 15,969
Cash and cash equivalents, at beginning of year | 152,453 | 119,968 | 103,999
Cash and cash equivalents, at end of year | $ 199,706 | $ 152,453 | $ 119,968

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