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v3.10.0.1

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jul. 01, 2017
Cash flows from operating activities: |  |
Net income | $ 34,056 | $ 13,640
Reconciliation of net income to net cash provided by operating activities: |  |
Depreciation and amortization | 3,326 | 3,552
Stock-based compensation | 5,017 | 4,327
Disposal of fixed assets | 51 | 98
Inventory write-down | 269 | 1,015
Deferred income taxes | 4,320 | 798
Changes in assets and liabilities: |  |
Accounts receivable | 7,193 | (4,720)
Inventories | (1,722) | (8,726)
Inventories-delivered systems | (322) | 783
Prepaid expenses and other | (3,422) | (947)
Accounts payable, accrued and other liabilities | 7,204 | (1,885)
Deferred revenue | 2,464 | 1,837
Income taxes payable | 537 | 486
Net cash provided by operating activities | 58,971 | 10,258
Cash flows from investing activities: |  |
Payments to acquire certain assets | (2,000) | (2,000)
Sales of marketable securities | 18,507 | 27,391
Maturities of marketable securities | 17,345 | 40,923
Purchases of marketable securities | (16,320) | (78,787)
Purchases of property, plant and equipment | (1,761) | (1,536)
Net cash provided by (used in) investing activities | 15,771 | (14,009)
Cash flows from financing activities: |  |
Proceeds from sale of shares under employee stock option plans and purchase plan | 2,709 | 2,865
Taxes paid on net issuance of stock awards | (2,731) | (3,392)
Net cash used in financing activities | (23,009) | (527)
Effect of exchange rate changes on cash and cash equivalents | (431) | (430)
Net increase (decrease) in cash and cash equivalents | 51,302 | (4,708)
Cash and cash equivalents, beginning of period | 34,899 | 47,062
Cash and cash equivalents, end of period | 86,201 | 42,354
Supplemental disclosure of non-cash investing activities: |  |
Transfer of property, plant and equipment to inventory | 218 | 1,531
Transfer of inventory to property, plant and equipment | 291 | 980
Property, plant and equipment included in accounts payable, accrued and other liabilities | 555 | $ 355
Share Repurchase Plans [Member] |  |
Cash flows from financing activities: |  |
Repurchases of common stock | $ (22,987) |

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