Commitments, Contingencies and Guarantees-Operating Leases (Details Textual 5)	Jun. 30, 2013
Operating Leased Assets
Operating Lease Expiration Minimum (Year)	2014
Operating Lease Expiration Maximum (Year)	2018

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

No definition available.

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