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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 26, 2020 | Dec. 28, 2019 | Dec. 29, 2018
Cash flows from operating activities: |  |  |
Net income | $ 78,523 | $ 39,346 | $ 104,036
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 20,694 | 17,185 | 14,314
Amortization | 27,991 | 27,672 | 29,373
Accretion of discount on investments | (2) | (365) | (10)
Reduction in the carrying amount of right-of-use assets | 5,955 | 5,269 | 0
Stock-based compensation expense | 23,830 | 23,176 | 17,827
Amortization of debt issuance costs | 32 | 160 | 390
Deferred income tax provision (benefit) | (562) | 4,954 | (74,908)
Provision for excess and obsolete inventories | 13,117 | 10,421 | 10,479
Acquired inventory step-up amortization | 838 | 465 | 0
Loss on disposal of long-lived assets | 451 | 486 | 325
Gain on contingent consideration | (2,879) | 0 | 0
Foreign currency transaction losses (gains) | (968) | 408 | 125
Loss on derivative instruments | 372 | 110 | 0
Changes in assets and liabilities: |  |  |
Accounts receivable | (3,545) | 481 | (13,830)
Inventories | (22,191) | (14,295) | (21,298)
Prepaid expenses and other current assets | (6,207) | 230 | 1,204
Other assets | 179 | (441) | 707
Accounts payable | 16,788 | (27) | 3,050
Accrued liabilities | 13,892 | 7,517 | (6,219)
Other liabilities | 362 | 166 | 3,109
Deferred revenues | 8,901 | 3,130 | 26
Operating lease liabilities | (6,315) | (5,000) | 0
Net cash provided by operating activities | 169,256 | 121,048 | 68,700
Cash flows from investing activities: |  |  |
Acquisition of property, plant and equipment | (55,865) | (20,847) | (19,869)
Acquisition of business, net of cash acquired | (51,880) | (20,524) | 0
Proceeds from sale of subsidiary | 82 | 132 | 94
Proceeds from sale of property and property, plant and equipment | 0 | 0 | 23
Purchases of marketable securities | (51,224) | (76,327) | (30,566)
Proceeds from maturities of marketable securities | 59,965 | 51,214 | 29,023
Net cash used in investing activities | (98,922) | (66,352) | (21,295)
Cash flows from financing activities: |  |  |
Proceeds from issuances of common stock | 10,010 | 8,093 | 7,712
Tax withholdings related to net share settlements of equity awards | (15,450) | (8,025) | (5,791)
Proceeds from term loan | 18,000 | 23,354 | 0
Payments on term loan | (43,417) | (30,000) | (41,250)
Payment of term loan issuance costs | (78) | 0 | 0
Net cash used in financing activities | (30,935) | (6,578) | (39,329)
Effect of exchange rate changes on cash, cash equivalents and restricted cash | 3,762 | (727) | (256)
Net increase in cash, cash equivalents and restricted cash | 43,161 | 47,391 | 7,820
Cash, cash equivalents and restricted cash, beginning of year | 147,937 | 100,546 | 92,726
Cash, cash equivalents and restricted cash, end of year | 191,098 | 147,937 | 100,546
Supplemental disclosure of non-cash investing and financing activities: |  |  |
Operating lease, right-of-use assets obtained in exchange for lease obligations | 1,912 | 36,709 | 0
Contingent consideration payable related to FRT acquisition | 0 | 5,364 | 0
Change in accounts payable and accrued liabilities related to property, plant and equipment purchases | 2,545 | 866 | 2,290
Supplemental disclosure of cash flow information: |  |  |
Income taxes paid, net | 9,150 | 4,324 | 4,576
Cash paid for interest | 867 | 1,405 | 3,113
Reconciliation of cash, cash equivalents and restricted cash: |  |  |
Total cash, cash equivalents and restricted cash | $ 191,098 | $ 100,546 | $ 92,726

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