Stockholders' Equity - Textual (Details) (USD $)
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3 Months Ended | |
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Mar. 28, 2015
Plan
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Mar. 29, 2014
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Number of equity incentive plans | 3calx_NumberOfEquityIncentivePlans | |
Stock options granted | 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross | |
Stock options, weighted average grant date fair value | $ 4.56us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | |
Stock options exercised | 84,352us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | |
Weighted-average exercise price per share, stock options | $ 6.68us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice | |
Unrecognized stock-based compensation expense, stock options | $ 7,500,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions | |
Weighted-average amortization period | 3 years 3 months | |
Taxes paid for awards vested under equity incentive plans | 506,000us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation | 473,000us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation |
Weight of historical volatility | 50.00%calx_PercentOfHistoricalVolatility | |
Weight of implied volatility | 50.00%calx_PercentOfImpliedVolatility | |
Restricted stock units (RSUs) | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Weighted-average amortization period | 2 years 3 months 40 days | |
Awards granted | 235,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
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Weighted-average grant date fair value per share | $ 9.87us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
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Awards vested | 1,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
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Taxes paid for awards vested under equity incentive plans | 4,000us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
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Unrecognized stock-based compensation expense | 10,900,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
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Restricted stock awards | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Weighted-average amortization period | 3 months 22 days | |
Awards granted | 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
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Taxes paid for awards vested under equity incentive plans | 31,000us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
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Unrecognized stock-based compensation expense | 300,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
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Employee stock purchase plan | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Weighted-average amortization period | 0 years 2 months | |
Unrecognized stock-based compensation expense | 300,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember |
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ESPP, maximum employee payroll deduction percentage | 15.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember |
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ESPP, maximum number of shares per employee | 2,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember |
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ESPP, discounted purchase price percentage | 85.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember |
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Shares available for issuance under the ESPP | 1,890,983us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember |
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Shares issued under the ESPP | 0us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember |
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Performance Restricted Stock Units | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Weighted-average amortization period | 1 year | |
Awards granted | 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |
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Taxes paid for awards vested under equity incentive plans | 500,000us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |
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Unrecognized stock-based compensation expense | 700,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |
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Period of average closing trading price ending on the last day of applicable performance period | 90 days | |
Period of average closing trading price preceding first day of performance period | 90 days | |
Shares converted into common stock | 147,916calx_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsConvertedintoCommonStock / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |
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Performance Restricted Stock Units | Minimum | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Performance period | 2 years | |
Target performance rate | 0.00%calx_TargetPerformanceRate / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
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Performance Restricted Stock Units | Maximum | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Performance period | 3 years | |
Target performance rate | 200.00%calx_TargetPerformanceRate / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
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Transition And Separation Agreement with Roger Weingarth | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Fair value of accelerated stock awards | 600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost / us-gaap_PlanNameAxis = calx_TransitionAndSeparationAgreementWithRogerWeingarthMember |
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Fair value recognized for accelerated stock awards | $ 100,000calx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalExpenseRecognized / us-gaap_PlanNameAxis = calx_TransitionAndSeparationAgreementWithRogerWeingarthMember |
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Common Stock | Performance Restricted Stock Units | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Shares of stock issued upon conversion of units | 92,359us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |
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Number of equity plans. No definition available.
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Percent of Historical Volatility No definition available.
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Percent of Implied Volatility No definition available.
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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Converted into Common Stock No definition available.
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Share-based Compensation Arrangement by Share-based Payment Award, Period of Average Closing Trading Price Ending on Last Day of Performance Period No definition available.
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Share-based Compensation Arrangement by Share-based Payment Award, Period of Average Closing Trading Price Preceding First Day of Performance Period No definition available.
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Share Based Compensation Arrangement by Share Based Payment Award Plan Modification Incremental Expense Recognized in current period. No definition available.
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Target Performance Rate No definition available.
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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. No definition available.
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Unrecognized cost of unvested options awarded to employees as compensation. No definition available.
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Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The highest quantity of shares an employee can purchase under the plan per period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Gross number of share options (or share units) granted during the period. No definition available.
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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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An excess of the fair value of the modified award over the fair value of the award immediately before the modification. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Purchase price of common stock expressed as a percentage of its fair value. No definition available.
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Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Number of shares issued during the period as a result of an employee stock purchase plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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