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Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Statement [Abstract] |  |  |
Revenue | $ 201,537 us-gaap_SalesRevenueNet | $ 155,047 us-gaap_SalesRevenueNet | $ 154,029 us-gaap_SalesRevenueNet
Cost of goods sold | 73,771 us-gaap_CostOfRevenue | 55,176 us-gaap_CostOfRevenue | 54,464 us-gaap_CostOfRevenue
Gross profit | 127,766 us-gaap_GrossProfit | 99,871 us-gaap_GrossProfit | 99,565 us-gaap_GrossProfit
Operating costs: |  |  |
Sales and marketing | 43,362 us-gaap_SellingAndMarketingExpense | 40,323 us-gaap_SellingAndMarketingExpense | 37,768 us-gaap_SellingAndMarketingExpense
Research and development | 19,497 us-gaap_ResearchAndDevelopmentExpense | 21,315 us-gaap_ResearchAndDevelopmentExpense | 18,794 us-gaap_ResearchAndDevelopmentExpense
General and administrative | 22,287 us-gaap_GeneralAndAdministrativeExpense | 21,196 us-gaap_GeneralAndAdministrativeExpense | 20,071 us-gaap_GeneralAndAdministrativeExpense
Amortization of purchased intangible assets | 4,532 us-gaap_AmortizationOfIntangibleAssets | 3,325 us-gaap_AmortizationOfIntangibleAssets | 1,905 us-gaap_AmortizationOfIntangibleAssets
Total operating costs | 89,678 us-gaap_OperatingExpenses | 86,159 us-gaap_OperatingExpenses | 78,538 us-gaap_OperatingExpenses
Operating income | 38,088 us-gaap_OperatingIncomeLoss | 13,712 us-gaap_OperatingIncomeLoss | 21,027 us-gaap_OperatingIncomeLoss
Interest income, net | 118 us-gaap_InterestIncomeExpenseNet | 162 us-gaap_InterestIncomeExpenseNet | 261 us-gaap_InterestIncomeExpenseNet
Other income, net | (286)us-gaap_OtherNonoperatingIncomeExpense | 240 us-gaap_OtherNonoperatingIncomeExpense | 409 us-gaap_OtherNonoperatingIncomeExpense
Income from continuing operations before income taxes | 37,920 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 14,114 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 21,697 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Provision for income taxes | 5,309 us-gaap_IncomeTaxExpenseBenefit | 3,147 us-gaap_IncomeTaxExpenseBenefit | 5,468 us-gaap_IncomeTaxExpenseBenefit
Net income-continuing operations | 32,611 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 10,967 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 16,229 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
Net income (loss) from discontinued operations | 873 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | 180 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | (630)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net income | $ 33,484 us-gaap_NetIncomeLoss | $ 11,147 us-gaap_NetIncomeLoss | $ 15,599 us-gaap_NetIncomeLoss
Basic income (loss) per share: |  |  |
Continuing operations | $ 0.83 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.28 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.43 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Discontinued Operations | $ 0.02 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.00 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ (0.02)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Total net income per share | $ 0.85 us-gaap_EarningsPerShareBasic | $ 0.28 us-gaap_EarningsPerShareBasic | $ 0.41 us-gaap_EarningsPerShareBasic
Diluted income (loss) per share: |  |  |
Continuing operations | $ 0.83 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.28 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.42 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Discontinued Operations | $ 0.02 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.00 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ (0.02)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Total net income per share | $ 0.85 us-gaap_EarningsPerShareDiluted | $ 0.28 us-gaap_EarningsPerShareDiluted | $ 0.40 us-gaap_EarningsPerShareDiluted
Weighted average common shares outstanding: |  |  |
Basic | 39,337 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 38,873 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 38,068 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted | 39,499 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 39,158 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 38,677 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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- Definition The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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