Employee Benefit Plans (Details 1) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Jan. 02, 2015
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Jan. 03, 2014
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Dec. 28, 2012
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Swiss Plan [Member] | |||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
Service cost | $ 297us-gaap_DefinedBenefitPlanServiceCost / staa_AllCountriesAxis = staa_SwissPlanMember |
$ 320us-gaap_DefinedBenefitPlanServiceCost / staa_AllCountriesAxis = staa_SwissPlanMember |
$ 301us-gaap_DefinedBenefitPlanServiceCost / staa_AllCountriesAxis = staa_SwissPlanMember |
Interest cost | 114us-gaap_DefinedBenefitPlanInterestCost / staa_AllCountriesAxis = staa_SwissPlanMember |
101us-gaap_DefinedBenefitPlanInterestCost / staa_AllCountriesAxis = staa_SwissPlanMember |
116us-gaap_DefinedBenefitPlanInterestCost / staa_AllCountriesAxis = staa_SwissPlanMember |
Expected return on plan assets | (97)us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets / staa_AllCountriesAxis = staa_SwissPlanMember |
(96)us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets / staa_AllCountriesAxis = staa_SwissPlanMember |
(100)us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets / staa_AllCountriesAxis = staa_SwissPlanMember |
Actuarial loss (Gain) recognized in current year | 24staa_DefinedBenefitPlanActuarialLossRecognizedInCurrentYear / staa_AllCountriesAxis = staa_SwissPlanMember |
55staa_DefinedBenefitPlanActuarialLossRecognizedInCurrentYear / staa_AllCountriesAxis = staa_SwissPlanMember |
54staa_DefinedBenefitPlanActuarialLossRecognizedInCurrentYear / staa_AllCountriesAxis = staa_SwissPlanMember |
Prior service loss recognized in current year | 0us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax / staa_AllCountriesAxis = staa_SwissPlanMember |
0us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax / staa_AllCountriesAxis = staa_SwissPlanMember |
0us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax / staa_AllCountriesAxis = staa_SwissPlanMember |
Transition obligation recognized in current year | 0us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax / staa_AllCountriesAxis = staa_SwissPlanMember |
0us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax / staa_AllCountriesAxis = staa_SwissPlanMember |
0us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax / staa_AllCountriesAxis = staa_SwissPlanMember |
Amendments | 0us-gaap_DefinedBenefitPlanPlanAmendments / staa_AllCountriesAxis = staa_SwissPlanMember |
0us-gaap_DefinedBenefitPlanPlanAmendments / staa_AllCountriesAxis = staa_SwissPlanMember |
0us-gaap_DefinedBenefitPlanPlanAmendments / staa_AllCountriesAxis = staa_SwissPlanMember |
Net periodic pension cost | 338us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost / staa_AllCountriesAxis = staa_SwissPlanMember |
380us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost / staa_AllCountriesAxis = staa_SwissPlanMember |
371us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost / staa_AllCountriesAxis = staa_SwissPlanMember |
Japan Plan [Member] | |||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
Service cost | 157us-gaap_DefinedBenefitPlanServiceCost / staa_AllCountriesAxis = staa_JapanPlanMember |
158us-gaap_DefinedBenefitPlanServiceCost / staa_AllCountriesAxis = staa_JapanPlanMember |
185us-gaap_DefinedBenefitPlanServiceCost / staa_AllCountriesAxis = staa_JapanPlanMember |
Interest cost | 9us-gaap_DefinedBenefitPlanInterestCost / staa_AllCountriesAxis = staa_JapanPlanMember |
8us-gaap_DefinedBenefitPlanInterestCost / staa_AllCountriesAxis = staa_JapanPlanMember |
13us-gaap_DefinedBenefitPlanInterestCost / staa_AllCountriesAxis = staa_JapanPlanMember |
Net amortization of transition obligation | 12us-gaap_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligation / staa_AllCountriesAxis = staa_JapanPlanMember |
12us-gaap_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligation / staa_AllCountriesAxis = staa_JapanPlanMember |
16us-gaap_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligation / staa_AllCountriesAxis = staa_JapanPlanMember |
Actuarial loss (Gain) recognized in current year | (10)staa_DefinedBenefitPlanActuarialLossRecognizedInCurrentYear / staa_AllCountriesAxis = staa_JapanPlanMember |
(31)staa_DefinedBenefitPlanActuarialLossRecognizedInCurrentYear / staa_AllCountriesAxis = staa_JapanPlanMember |
(58)staa_DefinedBenefitPlanActuarialLossRecognizedInCurrentYear / staa_AllCountriesAxis = staa_JapanPlanMember |
Prior service cost (credit) | (1)staa_DefinedBenefitPlanPriorServiceCost / staa_AllCountriesAxis = staa_JapanPlanMember |
(1)staa_DefinedBenefitPlanPriorServiceCost / staa_AllCountriesAxis = staa_JapanPlanMember |
(1)staa_DefinedBenefitPlanPriorServiceCost / staa_AllCountriesAxis = staa_JapanPlanMember |
Net periodic pension cost | $ 167us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost / staa_AllCountriesAxis = staa_JapanPlanMember |
$ 146us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost / staa_AllCountriesAxis = staa_JapanPlanMember |
$ 155us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost / staa_AllCountriesAxis = staa_JapanPlanMember |
X | ||||||||||
- Definition
Reflects the amount of actuarial loss recognized in current year. No definition available.
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X | ||||||||||
- Definition
Reflects the prior service cost of defined benefit plan. No definition available.
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X | ||||||||||
- Definition
Amount after tax of cost (credit) due to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as a component of net periodic benefit cost. No definition available.
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X | ||||||||||
- Definition
After tax amount of transition assets (obligations), as of the date FAS 87 or 106 was initially applied, that has not yet been recognized as a component of net periodic benefit cost. No definition available.
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X | ||||||||||
- Definition
Amount included in accumulated other comprehensive income (AOCI) related to transition obligation (asset) expected to be recognized as components of net periodic benefit cost (credit) for the fiscal year that follows the most recent annual statement of financial position. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The amount of increase or decrease due to a change in the terms of an existing plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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