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v2.4.1.9

Stockholders' Equity (Details Textual) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended |
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Jun. 11, 2013 | Aug. 31, 2007 | Jan. 03, 2015 | Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011 | Mar. 25, 2013 | Jan. 31, 2014 | Jan. 02, 2015
Undesignated Preferred stock authorized |  |  | 2,000,000 us-gaap_PreferredStockSharesAuthorized | 2,000,000 us-gaap_PreferredStockSharesAuthorized |  |  |  |  |
Preferred stock Par value |  |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare |  |  |  |  |
Convertible preferred stock, shares issued |  |  | 0 us-gaap_PreferredStockSharesIssued | 0 us-gaap_PreferredStockSharesIssued |  |  |  |  |
Warrants to purchase common stock |  | 600,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights |  |  |  |  |  |  |
Exercise price of warrants |  | $ 0.01 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 |  |  |  |  |  |  |
Warrants expiration date |  | Dec. 31, 2007 |  |  |  |  |  |  |
Warrants to purchase number of common stock |  | 1.2 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight |  |  |  |  |  |  |
Purchase price of preferred stock and warrants |  | $ 10.00 irix_PurchasePriceOfPreferredStockAndWarrants |  |  |  |  |  |  |
Proceeds allocated to common stock warrants |  | $ 2,300,000 us-gaap_ProceedsFromIssuanceOfWarrants |  |  |  |  |  |  |
Common stock converted from Series A Preferred Stock, shares | 1,000,000 us-gaap_ConversionOfStockSharesIssued1 |  |  |  |  |  |  |  |
Exercisable period |  |  | 3 years 4 days |  |  |  |  |  |
Shares reserved |  |  | 1,687,912 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance |  |  |  |  |  |
Weighted-average grant date fair value of the options granted |  |  | $ 4.02 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 3.16 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 2.60 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue |  |  |  |
Total intrinsic value of options exercised |  |  | 1,900,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 1,500,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 261,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue |  |  |  |
Total unrecognized compensation cost related to non-vested share-based compensation arrangements |  |  | 1,200,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized |  |  |  |  |  |
Cost is expected to be recognized over a weighted average period |  |  | 2 years 5 months 9 days |  |  |  |  |  |
Excess tax benefits from stock-based awards |  |  | 36,000 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities |  |  |  |  |  |
Restricted stock units granted |  |  | 62,225 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod | 234,012 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod | 66,665 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod |  |  |  |
Options vested and expected to vest, Weighted Average Exercise Price |  |  | $ 4.77 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice |  |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |
Grant of non-qualified stock option |  |  |  |  |  | 20,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |
The intrinsic value of the restricted stock units |  |  |  |  |  |  |  |  | $ 8.61 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Restricted stock units granted |  |  | 59,780 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 230,509 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 55,999 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
1998 Stock Plan |  |  |  |  |  |  |  |  |
Voting rights on outstanding capital stock |  |  |  | 10.00%irix_MinimumPercentageOfVotingPowerOfOutstandingCapitalStock / us-gaap_PlanNameAxis = irix_NineteenNinetyEightStockPlanMember |  |  |  |  |
Exercise price of option |  |  |  | 110.00%irix_MinimumPercentageOfFairValueOnGrantUsedToCalculateExercisePriceForMajorShareholders / us-gaap_PlanNameAxis = irix_NineteenNinetyEightStockPlanMember |  |  |  |  |
Term of incentive stock options for major stock holders |  |  |  | 5 years |  |  |  |  |
Exercisable period |  |  |  | 4 years |  |  |  |  |
Maximum term of incentive stock options granted |  |  |  | 10 years |  |  |  |  |
Repurchase of shares |  |  | 0 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_PlanNameAxis = irix_NineteenNinetyEightStockPlanMember | 0 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_PlanNameAxis = irix_NineteenNinetyEightStockPlanMember |  |  |  |  |
Expiration date of option Plan |  |  |  | 2008-02 |  |  |  |  |
2008 Equity Incentive Plan |  |  |  |  |  |  |  |  |
Grant of non-qualified stock option |  |  |  | 300,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = irix_TwoThousandEightEquityIncentivePlanMember |  |  |  |  |
Award One | Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |
Period consider for calculation of average stock price performance prior awards vesting |  |  | 2 months |  |  |  |  |  |
Period consider for calculation of average stock price performance after awards vesting |  |  | 2 months |  |  |  |  |  |
Restricted stock units granted |  |  |  |  |  |  | 220,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember / us-gaap_PlanNameAxis = irix_AwardOneMember |  |
Total value of Market Performance Award |  |  |  |  |  |  | 258,000 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember / us-gaap_PlanNameAxis = irix_AwardOneMember |  |
Award Two | Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |
Period consider for calculation of average stock price performance prior awards vesting |  |  |  |  |  |  |  | 2 months |
Period consider for calculation of average stock price performance after awards vesting |  |  |  |  |  |  |  | 2 months |
Restricted stock units granted |  |  |  |  |  |  |  | 50,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember / us-gaap_PlanNameAxis = irix_AwardTwoMember |
Options vested and expected to vest, Weighted Average Exercise Price |  |  |  |  |  |  |  | $ 11.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember / us-gaap_PlanNameAxis = irix_AwardTwoMember |
Total value of Market Performance Award |  |  |  |  |  |  | 234,000 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember / us-gaap_PlanNameAxis = irix_AwardTwoMember |  |
Common Stock |  |  |  |  |  |  |  |  |
Preferred stock conversion to common stock, share |  | 1,000,000 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 1,000,000 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Series A Preferred Stock |  |  |  |  |  |  |  |  |
Undesignated Preferred stock authorized |  | 500,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |  |  |  |
Preferred stock Par value |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |  |  |  |
Convertible preferred stock, shares issued |  | 500,000 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |  |  |  |
Unit preferred stock |  | 1 irix_NumberOfPreferredStockUsedToCalculatePerSharePurchasePriceOfStockAndWarrants / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |  |  |  |
Proceeds from common stock |  | $ 4,900,000 us-gaap_ProceedsFromIssuanceOfPreferredStockPreferenceStockAndWarrants / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |  |  |  |

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