Represents the interest rate will be increase in case of default.

No definition available.

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Namespace Prefix:	staa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of commission on outstanding notes payable during the payable.

+ References

No definition available.

+ Details

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Namespace Prefix:	staa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of financing cost related to leases that have been recorded under the deposit method, as a financing or as a capital leases in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

+ References

No definition available.

+ Details

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Namespace Prefix:	staa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale Leaseback Transaction Net Proceeds Expiration Term.

+ References

No definition available.

+ Details

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Namespace Prefix:	staa_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow for payments to acquire rented equipment which is recorded as an asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The liability due as of the balance sheet date for leasebacks accounted for using the deposit method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77913982&loc=d3e50796-112755

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84164451&loc=d3e36991-112694

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_SaleLeasebackTransactionDescriptionAxis=staa_LeaseLineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=staa_NonHardwareEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=staa_HardwareequipmentmemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=staa_LeaseSchedule010Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=staa_LeaseSchedule008rMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=staa_LeaseSchedule009rMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=staa_MizuhobankmemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Liabilities (Details Textual)		1 Months Ended		12 Months Ended
Liabilities (Details Textual)	Jun. 12, 2014 USD ($)	Mar. 31, 2018 USD ($)	Jan. 31, 2017 USD ($)	Dec. 29, 2017 USD ($)	Dec. 29, 2017 JPY (¥)	Dec. 30, 2016 USD ($)	Dec. 30, 2016 JPY (¥)	Sep. 30, 2013 CHF (SFr)
Line of Credit Facility, Maximum Borrowing Capacity \| ¥					¥ 500,000,000
Line of Credit, Current				$ 4,438,000	¥ 500,000,000	$ 4,283,000	¥ 500,000,000
Line of Credit Facility, Current Borrowing Capacity				$ 1,000,000		1,000,000		SFr 1,000,000
Interest Rate Increase In Case Of Default				14.00%
Asset Retirement Obligations, Noncurrent				$ 202,000		195,000
Percentage Of Commission On Outstanding Notes Payable				0.25%
Lease Line Of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 2,000,000
Non Hardware Equipment [Member] \| Lease Line Of Credit [Member]
Sale Leaseback Transaction, Imputed Interest Rate Term			4.75% per $1
Sale Leaseback Transaction, Amount Due under Financing Arrangement				$ 1,067,000
HardwareEquipment [Member] \| Lease Line Of Credit [Member]
Sale Leaseback Transaction, Imputed Interest Rate Term			3.94% per $1
Lease Schedule 010 [Member] \| Scenario, Forecast [Member]
Payments to Acquire Equipment on Lease		$ 1,600,000
lease schedule 008R [Member]
Payments to Acquire Equipment on Lease	$ 964,612
Sale Leaseback Transaction Net Proceeds Expiration Term	36 months
lease schedule 008R [Member] \| Non Hardware Equipment [Member]
Sale Leaseback Transaction, Imputed Interest Rate Term	3.12% per $1
lease schedule 008R [Member] \| HardwareEquipment [Member]
Sale Leaseback Transaction, Imputed Interest Rate Term	2.81% per $1
lease schedule 009R [Member]
Payments to Acquire Equipment on Lease			$ 1,957,000
Sale Leaseback Transaction Net Proceeds Expiration Term			24 months
lease schedule 009R [Member] \| Non Hardware Equipment [Member]
Sale Leaseback Transaction, Imputed Interest Rate Term			4.75% per $1
lease schedule 009R [Member] \| HardwareEquipment [Member]
Sale Leaseback Transaction, Imputed Interest Rate Term			3.94% per $1
MizuhoBank [Member]
Line of Credit Facility, Interest Rate Description				(approximately 0.06% as of December 29, 2017) plus a 0.50% spread, and may be renewed quarterly (the current line expires on February 21, 2018).
Foreign Exchange [Member]
Line of Credit, Current				$ 4,438,000		$ 4,283,000