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Stockholders' Equity (Details Textual) (USD $)
 0 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended
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     2,000,000us-gaap_PreferredStockSharesAuthorized 2,000,000us-gaap_PreferredStockSharesAuthorized          
Preferred stock Par value     $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare          
Convertible preferred stock, shares issued     0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued          
Warrants to purchase common stock   600,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights              
Exercise price of warrants   $ 0.01us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1              
Warrants expiration date   Dec. 31, 2007              
Warrants to purchase number of common stock   1.2us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight              
Purchase price of preferred stock and warrants   $ 10.00irix_PurchasePriceOfPreferredStockAndWarrants              
Proceeds allocated to common stock warrants   $ 2,300,000us-gaap_ProceedsFromIssuanceOfWarrants              
Common stock converted from Series A Preferred Stock, shares 1,000,000us-gaap_ConversionOfStockSharesIssued1                
Exercisable period     3 years 4 days            
Shares reserved     1,687,912us-gaap_CommonStockCapitalSharesReservedForFutureIssuance            
Weighted-average grant date fair value of the options granted     $ 4.02us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 3.16us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 2.60us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue        
Total intrinsic value of options exercised     1,900,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue 1,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue 261,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue        
Total unrecognized compensation cost related to non-vested share-based compensation arrangements     1,200,000us-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     36,000us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities            
Restricted stock units granted     62,225us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod 234,012us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod 66,665us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod        
Options vested and expected to vest, Weighted Average Exercise Price     $ 4.77us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice            
Restricted Stock Units (RSUs)                  
Grant of non-qualified stock option           20,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		      
The intrinsic value of the restricted stock units                 $ 8.61us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
Restricted stock units granted     59,780us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		 230,509us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		 55,999us-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     0us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
/ us-gaap_PlanNameAxis
= irix_NineteenNinetyEightStockPlanMember		 0us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
/ us-gaap_PlanNameAxis
= irix_NineteenNinetyEightStockPlanMember		          
Expiration date of option Plan       2008-02          
2008 Equity Incentive Plan                  
Grant of non-qualified stock option       300,000us-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             220,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= irix_AwardOneMember		    
Total value of Market Performance Award             258,000us-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               50,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= irix_AwardTwoMember		  
Options vested and expected to vest, Weighted Average Exercise Price               $ 11.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= irix_AwardTwoMember		  
Total value of Market Performance Award             234,000us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= irix_AwardTwoMember		    
Common Stock                  
Preferred stock conversion to common stock, share   1,000,000us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		   1,000,000us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		          
Series A Preferred Stock                  
Undesignated Preferred stock authorized   500,000us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember		              
Preferred stock Par value   $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember		              
Convertible preferred stock, shares issued   500,000us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember		              
Unit preferred stock   1irix_NumberOfPreferredStockUsedToCalculatePerSharePurchasePriceOfStockAndWarrants
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember		              
Proceeds from common stock   $ 4,900,000us-gaap_ProceedsFromIssuanceOfPreferredStockPreferenceStockAndWarrants
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember