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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 28, 2018 | Sep. 29, 2017
Cash flows from operating activities: |  |
Net loss | $ (24,365) | $ (71,110)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Amortization of intangibles | 6,281 | 6,232
Depreciation | 9,910 | 11,045
Stock-based compensation | 14,202 | 11,107
Amortization of discount on convertible debt and issuance cost | 4,482 | 4,060
Restructuring, asset impairment and loss on retirement of fixed assets | 1,105 | 565
Amortization of non-cash warrant | 1,185 | 38
Deferred income taxes, net | 1,056 | 0
Foreign currency adjustments | (1,034) | 1,795
Provision for excess and obsolete inventories | 1,259 | 5,578
Allowance for doubtful accounts and returns | 1,357 | 4,309
Other non-cash adjustments, net | 286 | 298
Changes in operating assets and liabilities: |  |
Accounts receivable | (9,585) | 11,367
Inventories | 997 | 6,188
Prepaid expenses and other assets | 2,507 | 6,702
Accounts payable | (4,032) | 2,129
Deferred revenue | 1,783 | (1,098)
Income taxes payable | 461 | (2,122)
Accrued and other liabilities | (2,188) | (3,053)
Net cash provided by (used in) operating activities | 5,667 | (5,970)
Cash flows from investing activities: |  |
Proceeds from maturities of investments | 0 | 3,106
Proceeds from sales of investments | 104 | 3,792
Purchases of property and equipment | (4,703) | (9,075)
Net cash used in investing activities | (4,599) | (2,177)
Cash flows from financing activities: |  |
Proceeds from other debts and capital leases | 5,066 | 6,344
Repayment of other debts and capital leases | (6,568) | (7,008)
Proceeds from common stock issued to employees | 4,299 | 4,697
Payment of tax withholding obligations related to net share settlements of restricted stock units | (166) | (2,757)
Net cash provided by financing activities | 2,631 | 1,276
Effect of exchange rate changes on cash, cash equivalents and restricted cash | (580) | 1,471
Net increase (decrease) in cash, cash equivalents and restricted cash | 3,119 | (5,400)
Cash, cash equivalents and restricted cash at beginning of period | 58,757 | 57,420
Cash, cash equivalents and restricted cash at end of period | 61,876 | 52,020
Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets |  |
Total cash, cash equivalents and restricted cash | $ 58,757 | $ 57,420

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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3151-108585 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from debt classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition The cash inflow from sales of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt and payment of capital lease obligations. + References No definition available. + Details
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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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