Commitments, Contingencies and Guarantees (Details Textual 5) (USD $)	Jan. 01, 2012	Jan. 31, 2012 Milpitas, California [Member]
Operating Leased Assets [Line Items]
Operating Lease Expiration Minimum (Year)	2012
Operating Lease Expiration Maximum (Year)	2016	2013
Property Acquisition
Real Estate Investment Property, at Cost		$ 87,500,000
Property, Plant or Equipment Acquired (Amount)		5
Property, Plant or Equipment Under Operating Lease (Amount)		3
Operating Leases, Future Minimum Payments Due	$ 24,259,000	$ 3,900,000

Latest date (year) of expiration of operating lease as of reported date.

No definition available.

Name:	sndk_OperatingLeaseExpirationMaximumYear
Namespace Prefix:	sndk_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	instant

- Definition

Earliest date (year) of expiration of operating lease as of reported date.

+ References

No definition available.

+ Details

Name:	sndk_OperatingLeaseExpirationMinimumYear
Namespace Prefix:	sndk_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of property, plant or equipment acquired.

+ References

No definition available.

+ Details

Name:	sndk_PropertyPlantOrEquipmentAcquiredAmount
Namespace Prefix:	sndk_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of property, plant or equipment leased under an operating lease.

+ References

No definition available.

+ Details

Name:	sndk_PropertyPlantOrEquipmentUnderOperatingLeaseAmount
Namespace Prefix:	sndk_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	sndk_PropertyPurchasesAbstract
Namespace Prefix:	sndk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

The total of future contractually required payments on leases defined as operating.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 122

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 16

-Subparagraph b(i)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

+ Details

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

- Definition

Represents a total which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.1(d))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_RealEstateInvestmentPropertyAtCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant