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v2.4.1.9

Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Cash flows from operating activities: |  |  |
Net loss | $ (39,674)us-gaap_NetIncomeLoss | $ (43,413)us-gaap_NetIncomeLoss | $ (89,266)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Depreciation and amortization | 7,408 us-gaap_DepreciationAndAmortization | 8,949 us-gaap_DepreciationAndAmortization | 12,337 us-gaap_DepreciationAndAmortization
Loss on goodwill and purchased intangible assets impairment | 0 us-gaap_GoodwillAndIntangibleAssetImpairment | 0 us-gaap_GoodwillAndIntangibleAssetImpairment | 49,521 us-gaap_GoodwillAndIntangibleAssetImpairment
Impairment loss on equipment, leasehold improvements and software license intangible assets | 0 nvtl_ImpairmentLossOnEquipmentAndSoftwareLicenseIntangibleAssets | 418 nvtl_ImpairmentLossOnEquipmentAndSoftwareLicenseIntangibleAssets | 100 nvtl_ImpairmentLossOnEquipmentAndSoftwareLicenseIntangibleAssets
Provision for bad debts, net of recoveries | 86 us-gaap_ProvisionForDoubtfulAccounts | 1,936 us-gaap_ProvisionForDoubtfulAccounts | 439 us-gaap_ProvisionForDoubtfulAccounts
Net impairment loss on marketable securities | 0 us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments | 0 us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments | 39 us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments
Provision for excess and obsolete inventory | 3,382 us-gaap_InventoryWriteDown | 4,344 us-gaap_InventoryWriteDown | 2,843 us-gaap_InventoryWriteDown
Share-based compensation expense | 3,588 us-gaap_ShareBasedCompensation | 3,443 us-gaap_ShareBasedCompensation | 7,500 us-gaap_ShareBasedCompensation
Change in fair value of warrant liability and fair value of beneficial conversion feature on convertible Series C preferred shares | 3,725 nvtl_FairValueAdjustmentofWarrantsCashPortion | 0 nvtl_FairValueAdjustmentofWarrantsCashPortion | 0 nvtl_FairValueAdjustmentofWarrantsCashPortion
Shareholder litigation loss | 0 nvtl_ContingentLossForLitigationNoncashPortion | 14,326 nvtl_ContingentLossForLitigationNoncashPortion | 0 nvtl_ContingentLossForLitigationNoncashPortion
Non-cash income tax expense | 87 nvtl_NonCashIncomeTaxExpenseBenefit | 220 nvtl_NonCashIncomeTaxExpenseBenefit | 462 nvtl_NonCashIncomeTaxExpenseBenefit
Changes in assets and liabilities: |  |  |
Accounts receivable | 15,688 us-gaap_IncreaseDecreaseInAccountsReceivable | 730 us-gaap_IncreaseDecreaseInAccountsReceivable | (6,242)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories | (13,392)us-gaap_IncreaseDecreaseInInventories | 6,879 us-gaap_IncreaseDecreaseInInventories | 420 us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other assets | (2,403)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (489)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (1,237)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable | 10,036 us-gaap_IncreaseDecreaseInAccountsPayable | (19,237)us-gaap_IncreaseDecreaseInAccountsPayable | (10,433)us-gaap_IncreaseDecreaseInAccountsPayable
Accrued expenses, income taxes, and other | (4,798)us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities | (4,733)us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities | 3,638 us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities
Net cash used in operating activities | (16,267)us-gaap_NetCashProvidedByUsedInOperatingActivities | (26,627)us-gaap_NetCashProvidedByUsedInOperatingActivities | (29,879)us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities: |  |  |
Purchases of property and equipment | (1,753)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (5,011)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (4,579)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of intangible assets | (431)us-gaap_PaymentsToAcquireIntangibleAssets | 0 us-gaap_PaymentsToAcquireIntangibleAssets | (104)us-gaap_PaymentsToAcquireIntangibleAssets
Purchases of marketable securities | (1,359)us-gaap_PaymentsToAcquireMarketableSecurities | (24,262)us-gaap_PaymentsToAcquireMarketableSecurities | (44,216)us-gaap_PaymentsToAcquireMarketableSecurities
Marketable securities maturities / sales | 23,975 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities | 40,897 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities | 46,696 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Net cash provided by (used in) investing activities | 20,432 us-gaap_NetCashProvidedByUsedInInvestingActivities | 11,624 us-gaap_NetCashProvidedByUsedInInvestingActivities | (2,203)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities: |  |  |
Proceeds from the issuances of Series C preferred and common stock, net of issuance costs | 14,163 us-gaap_ProceedsFromIssuanceOrSaleOfEquity | 0 us-gaap_ProceedsFromIssuanceOrSaleOfEquity | 0 us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Proceeds from the issuance of short-term debt, net of issuance costs | 0 us-gaap_ProceedsFromRepaymentsOfShortTermDebt | 20,300 us-gaap_ProceedsFromRepaymentsOfShortTermDebt | 14,000 us-gaap_ProceedsFromRepaymentsOfShortTermDebt
Principal repayments of short-term debt | (2,566)us-gaap_RepaymentsOfShortTermDebt | (17,734)us-gaap_RepaymentsOfShortTermDebt | (14,000)us-gaap_RepaymentsOfShortTermDebt
Repayment of litigation settlement note payable, including interest | (5,026)us-gaap_PaymentsForLegalSettlements | 0 us-gaap_PaymentsForLegalSettlements | 0 us-gaap_PaymentsForLegalSettlements
Borrowings on revolving credit facility | 5,158 us-gaap_ProceedsFromLinesOfCredit | 0 us-gaap_ProceedsFromLinesOfCredit | 0 us-gaap_ProceedsFromLinesOfCredit
Principal payments under capital lease obligations | 0 us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations | 0 us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations | (46)us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations
Taxes paid on vested restricted stock units net of proceeds from stock option exercises and ESPP | (821)nvtl_ProceedsFromStockOptionExercisesAndEsppNetOfTaxesPaidOnVestedRestrictedStockUnits | (552)nvtl_ProceedsFromStockOptionExercisesAndEsppNetOfTaxesPaidOnVestedRestrictedStockUnits | 1,166 nvtl_ProceedsFromStockOptionExercisesAndEsppNetOfTaxesPaidOnVestedRestrictedStockUnits
Net cash provided by financing activities | 10,908 us-gaap_NetCashProvidedByUsedInFinancingActivities | 2,014 us-gaap_NetCashProvidedByUsedInFinancingActivities | 1,120 us-gaap_NetCashProvidedByUsedInFinancingActivities
Effect of exchange rates on cash and cash equivalents | (131)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | (144)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | (63)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net increase (decrease) in cash and cash equivalents | 14,942 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (13,133)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (31,025)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period | 2,911 us-gaap_CashAndCashEquivalentsAtCarryingValue | 16,044 us-gaap_CashAndCashEquivalentsAtCarryingValue | 47,069 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period | 17,853 us-gaap_CashAndCashEquivalentsAtCarryingValue | 2,911 us-gaap_CashAndCashEquivalentsAtCarryingValue | 16,044 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash paid during the year for: |  |  |
Interest | 119 us-gaap_InterestPaidNet | 65 us-gaap_InterestPaidNet | 17 us-gaap_InterestPaidNet
Income taxes | 108 us-gaap_IncomeTaxesPaidNet | 121 us-gaap_IncomeTaxesPaidNet | 104 us-gaap_IncomeTaxesPaidNet
Supplemental disclosures of non-cash activities: |  |  |
Building rent incentives to fund leasehold improvements | 0 nvtl_BuildingRentIncentivesToFundLeaseholdImprovements | 359 nvtl_BuildingRentIncentivesToFundLeaseholdImprovements | 0 nvtl_BuildingRentIncentivesToFundLeaseholdImprovements
Issuance of common stock for litigation settlement | 5,000 us-gaap_StockIssued1 | 0 us-gaap_StockIssued1 | 0 us-gaap_StockIssued1
Initial fair value of warrant liability recorded upon issuance of Series C preferred and common stock | 4,939 nvtl_MarketableEquitySecuritiesReceivedInSettlementOfNoteReceivable | 0 nvtl_MarketableEquitySecuritiesReceivedInSettlementOfNoteReceivable | 0 nvtl_MarketableEquitySecuritiesReceivedInSettlementOfNoteReceivable
Issuance of common stock for conversion of Series C preferred shares | $ 940 us-gaap_ConversionOfStockAmountIssued1 | $ 0 us-gaap_ConversionOfStockAmountIssued1 | $ 0 us-gaap_ConversionOfStockAmountIssued1

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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e565-108580 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 + Details
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- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + 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 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Cash outflow for purchase of trading, available-for-sale securities and held-to-maturity securities. + 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 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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