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Stock-Based Compensation (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 03, 2015	Apr. 04, 2014
Schedule of Employee Service Share-based Compensation [Line Items]
Total stock compensation expense	$ 994us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	$ 1,500us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1
Amounts capitalized as part of inventory	122staa_CompensationCostCapitalised	78staa_CompensationCostCapitalised
Total	1,116us-gaap_AllocatedShareBasedCompensationExpense	1,578us-gaap_AllocatedShareBasedCompensationExpense
General and administrative [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Total stock compensation expense	593us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1 / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember	928us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1 / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember
Marketing and selling [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Total stock compensation expense	251us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1 / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingAndMarketingExpenseMember	302us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1 / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingAndMarketingExpenseMember
Research and development [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Total stock compensation expense	$ 150us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1 / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember	$ 270us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1 / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember

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- Definition

Reflects the capitalized compensation cost.

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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- Definition

Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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