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Fair Value Measurements Fair value hierarchy the Company’s financial assets and liabilities (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
May 08, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Acquisition-related contingent consideration $ 18,810,000us-gaap_BusinessCombinationContingentConsiderationLiability $ 18,260,000us-gaap_BusinessCombinationContingentConsiderationLiability $ 11,900,000us-gaap_BusinessCombinationContingentConsiderationLiability
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High     90,000,000us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Accrued Liabilities and Other Liabilities 18,810,000us-gaap_AccruedLiabilitiesAndOtherLiabilities 18,260,000us-gaap_AccruedLiabilitiesAndOtherLiabilities  
Business Combination, Liabilities Arising from Contingencies, Amount Recognized 13,200,000us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized 12,800,000us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized  
Fair Value, Inputs, Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent Consideration Classified as Equity, Fair Value Disclosure 0us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 0us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		  
Accrued Liabilities and Other Liabilities 0us-gaap_AccruedLiabilitiesAndOtherLiabilities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 0us-gaap_AccruedLiabilitiesAndOtherLiabilities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		  
Fair Value, Inputs, Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent Consideration Classified as Equity, Fair Value Disclosure 0us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 0us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		  
Accrued Liabilities and Other Liabilities 0us-gaap_AccruedLiabilitiesAndOtherLiabilities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 0us-gaap_AccruedLiabilitiesAndOtherLiabilities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		  
Fair Value, Inputs, Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent Consideration Classified as Equity, Fair Value Disclosure 18,810,000us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 18,260,000us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		  
Accrued Liabilities and Other Liabilities 18,810,000us-gaap_AccruedLiabilitiesAndOtherLiabilities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 18,260,000us-gaap_AccruedLiabilitiesAndOtherLiabilities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		  
Contingent Consideration Classified as Equity [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Acquisition-related contingent consideration 18,810,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= us-gaap_ContingentConsiderationClassifiedAsEquityMember		 18,260,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= us-gaap_ContingentConsiderationClassifiedAsEquityMember		  
Amorcyte, LLC [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Acquisition-related contingent consideration 5,600,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ dei_LegalEntityAxis
= nbs_AmorcyteLlcMember		 5,500,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ dei_LegalEntityAxis
= nbs_AmorcyteLlcMember		  
Contingent Consideration Classified as Equity [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent Consideration Classified as Equity, Fair Value Disclosure $ 18,810,000us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure
/ us-gaap_ContingentConsiderationByTypeAxis
= us-gaap_ContingentConsiderationClassifiedAsEquityMember		 $ 18,260,000us-gaap_ContingentConsiderationClassifiedAsEquityFairValueDisclosure
/ us-gaap_ContingentConsiderationByTypeAxis
= us-gaap_ContingentConsiderationClassifiedAsEquityMember