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Shareholders' Equity Equity Issuances (Details) (USD $)
 12 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Mar. 31, 2014
May 08, 2014
Sep. 28, 2011
Feb. 28, 2013
Class of Stock [Line Items]              
Warrant inducements 0nbs_StockIssuedDuringPeriodSharesWarrantInducements 40,407nbs_StockIssuedDuringPeriodSharesWarrantInducements          
Common Stock, Shares, Issued         5,329,593us-gaap_CommonStockSharesIssued    
Proceeds from issuance of common stock $ 16,710,645us-gaap_StockIssuedDuringPeriodValueNewIssues $ 58,736,166us-gaap_StockIssuedDuringPeriodValueNewIssues $ 16,428,827us-gaap_StockIssuedDuringPeriodValueNewIssues        
Aspire Capital Purchase Agreement [Member]              
Class of Stock [Line Items]              
Committment Value Under Purchase Agreement       20,000,000nbs_CommitmentValueUnderPurchaseAgreement
/ us-gaap_SubsidiarySaleOfStockAxis
= nbs_AspireCapitalPurchaseAgreementMember		   20,000,000nbs_CommitmentValueUnderPurchaseAgreement
/ us-gaap_SubsidiarySaleOfStockAxis
= nbs_AspireCapitalPurchaseAgreementMember		  
Proceeds from Issuance of Common Stock       5,600,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_SubsidiarySaleOfStockAxis
= nbs_AspireCapitalPurchaseAgreementMember		      
Term Of Agreement In Months       24nbs_TermOfAgreementInMonths
/ us-gaap_SubsidiarySaleOfStockAxis
= nbs_AspireCapitalPurchaseAgreementMember		   24nbs_TermOfAgreementInMonths
/ us-gaap_SubsidiarySaleOfStockAxis
= nbs_AspireCapitalPurchaseAgreementMember		  
Discount Applied To Weighted Average Price       5.00%nbs_DiscountAppliedToWeightedAveragePrice
/ us-gaap_SubsidiarySaleOfStockAxis
= nbs_AspireCapitalPurchaseAgreementMember		      
Proceeds from issuance of common stock 10,900,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= nbs_AspireCapitalPurchaseAgreementMember		            
Purchase Commitment, Remaining Minimum Amount Committed 19,100,000us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted
/ us-gaap_SubsidiarySaleOfStockAxis
= nbs_AspireCapitalPurchaseAgreementMember		            
Aspire Capital Purchase Agreement [Member]              
Class of Stock [Line Items]              
Stock Issued During Period, Shares, New Issues       800,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ dei_LegalEntityAxis
= nbs_AspireCapitalPurchaseAgreementMember		      
Common Stock, Shares, Issued       150,000us-gaap_CommonStockSharesIssued
/ dei_LegalEntityAxis
= nbs_AspireCapitalPurchaseAgreementMember		     1,600,000us-gaap_CommonStockSharesIssued
/ dei_LegalEntityAxis
= nbs_AspireCapitalPurchaseAgreementMember
Purchase Commitment, Remaining Minimum Amount Committed       $ 30,000,000us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted
/ dei_LegalEntityAxis
= nbs_AspireCapitalPurchaseAgreementMember