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v3.19.3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 28, 2019 | Sep. 29, 2018
Cash flows from operating activities: |  |
Net income | $ 11,114 | $ 45,624
Reconciliation of net income to net cash from operating activities: |  |
Depreciation and amortization | 7,712 | 4,962
Stock-based compensation | 9,713 | 8,229
Disposal of fixed assets | (831) | 38
Inventory write-down | 4,139 | 870
Deferred income taxes | (4) | 4,668
Changes in assets and liabilities: |  |
Accounts receivable | (6,251) | 11,520
Inventories | (13,130) | (6,351)
Inventories-delivered systems | 63 | (324)
Prepaid expenses and other | (1,461) | (1,224)
Operating lease - right of use assets | 1,917 |
Accounts payable, accrued and other liabilities | (8,053) | 9,623
Deferred revenue | (1,941) | 5,126
Operating lease liabilities | (1,774) |
Income taxes payable | (2,348) | 647
Net cash provided by (used in) operating activities | (1,135) | 83,408
Cash flows from investing activities: |  |
Payments to acquire certain assets |  | (2,000)
Sales of marketable securities | 3,968 | 19,776
Maturities of marketable securities | 48,753 | 32,195
Purchases of marketable securities | (104,585) | (46,604)
Purchases of property, plant and equipment | (9,943) | (2,942)
Proceeds from sale of property, plant and equipment | 896 |
Net cash provided by (used in) investing activities | (60,911) | 425
Cash flows from financing activities: |  |
Proceeds from sale of shares under employee stock option plans and purchase plan | 4,554 | 3,826
Taxes paid on net issuance of stock awards | (2,505) | (3,122)
Repurchases of common stock under share repurchase plans |  | (22,987)
Net cash provided by (used in) financing activities | 2,049 | (22,283)
Effect of exchange rate changes on cash and cash equivalents | 55 | (346)
Net increase (decrease) in cash and cash equivalents | (59,942) | 61,204
Cash and cash equivalents, beginning of period | 110,951 | 34,899
Cash and cash equivalents, end of period | 51,009 | 96,103
Supplemental disclosure of non-cash investing activities: |  |
Transfers between inventory and property, plant and equipment, net | 1,198 | 602
Unpaid property, plant and equipment | $ 1,062 | $ 1,684

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