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Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Clinical Services Reimbursement | $ 0.8 | $ 0.6 | $ 2.0 | $ 1.1

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- Definition Clinical Services Reimbursement + References No definition available. + Details
Name: | nbs_ClinicalServicesReimbursement
Namespace Prefix: | nbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration