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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Apr. 01, 2016
Cash flows from operating activities: |  |
Net loss | $ (24,027) | $ (25,180)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Amortization of intangibles | 2,069 | 2,783
Depreciation | 3,599 | 3,317
Stock-based compensation | 3,251 | 3,094
Amortization of discount on convertible debt | 1,316 | 1,187
Restructuring, asset impairment and loss on retirement of fixed assets | 187 | 1,675
Amortization of non-cash warrant | 416 | 0
Loss on impairment of long-term investment | 0 | 1,476
Provision for excess and obsolete inventories | 387 | 418
Allowance for doubtful accounts and returns | 2,700 | 739
Other non-cash adjustments, net | 72 | 0
Changes in operating assets and liabilities, net of effects of acquisition: |  |
Accounts receivable | 14,388 | (10,894)
Inventories | 942 | (51)
Prepaid expenses and other assets | (3,151) | (6,078)
Accounts payable | (6,687) | (3,890)
Deferred revenue | 5,435 | 24,963
Income taxes payable | 6 | (13)
Accrued and other liabilities | (3,999) | 1,046
Net cash used in operating activities | (3,096) | (5,408)
Cash flows from investing activities: |  |
Acquisition of business, net of cash acquired | 0 | (69,532)
Proceeds from maturities of investments | 3,106 | 7,394
Purchases of property and equipment | 3,792 | 0
Purchases of property and equipment | (3,217) | (2,664)
Net cash provided by (used in) investing activities | 3,681 | (64,802)
Cash flows from financing activities: |  |
Payment of convertible debt issuance costs | 0 | (582)
Proceeds from other debts and capital leases | 0 | 262
Repayment of other debts and capital leases | (953) | (114)
Proceeds from common stock issued to employees | 2,114 | 2,074
Payment of tax withholding obligations related to net share settlements of restricted stock units | (2,383) | (955)
Net cash (used in) provided by financing activities | (1,222) | 685
Effect of exchange rate changes on cash and cash equivalents | 294 | 330
Net decrease in cash and cash equivalents | (343) | (69,195)
Cash and cash equivalents at beginning of period | 55,635 | 126,190
Cash and cash equivalents at end of period | $ 55,292 | $ 56,995

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- Definition Amount of cash inflow from debt classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=66902209&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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