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Shareholders' Equity Activity for stock options and warrants (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 28,600us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	16,600us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	1,658,100us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
Common Stock Warrants, Shares		4,898,266nbs_CommonStockWarrantsShares
Weighted Average Exercise Price, Warrants Outstanding	14.12nbs_WeightedAverageExercisePriceWarrantsOutstanding	16.5nbs_WeightedAverageExercisePriceWarrantsOutstanding
Weighted Average Remaining Contractual Term warrant outstanding	2 years 1 month 13 days
Weighted Average Remaining Contractual Term, Warrants Outstanding		2 years 7 months 17 days
Aggregate Intrinsic Value, Warrants Outstanding	1,000nbs_AggregateIntrinsicValueWarrantsOutstanding	1,811,000nbs_AggregateIntrinsicValueWarrantsOutstanding
Warrant inducements	0nbs_StockIssuedDuringPeriodSharesWarrantInducements	40,407nbs_StockIssuedDuringPeriodSharesWarrantInducements
Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Equity Instruments, Outstanding [Roll Forward]
Warrants Granted	2,722nbs_WarrantsGranted
Weighted Average Exercise Price, Warrants Granted	$ 12.26nbs_WeightedAverageExercisePriceWarrantsGranted
Warrants Exercised	(333,250)nbs_WarrantsExercised
Weighted Average Exercise Price, Warrants Exercised	$ 5.16nbs_WeightedAverageExercisePriceWarrantsExercised
Warrants Expired	(100,108)nbs_WarrantsExpired
Weighted Average Exercise Price, Warrants Expired	$ 70nbs_WeightedAverageExercisePriceWarrantsExpired
Warrants Canceled	(916,674)nbs_WarrantsCanceled
Weighted Average Exercise Price, Warrants Canceled	$ 23.95nbs_WeightedAverageExercisePriceWarrantsCanceled
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value	27,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
shares, vested and expected to vest	3,550,956nbs_Sharesvestedandexpectedtovest
Weighted Average Exercise Price, Warrants vested & expected to vest	14.12nbs_WeightedAverageExercisePriceWarrantsvestedexpectedtovest
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	3,543,456us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Weighted Average Exercise Price, Warrants Exercisable	14.13nbs_WeightedAverageExercisePriceWarrantsExercisable
weighted Average Remaining Contractual Term, warrants vested	2 years 1 month 13 days
Aggregate Intrinsic Value, Warrants vested and expected to vest	1,000nbs_AggregateIntrinsicValueWarrantsvestedandexpectedtovest
Aggregate Intrinsic Value, Warrants vested	1,000nbs_AggregateIntrinsicValueWarrantsvested
Warrants Issued During Period, Value	$ 0nbs_WarrantsIssuedDuringPeriodValue	$ 149,900nbs_WarrantsIssuedDuringPeriodValue
Warrant [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Equity Instruments, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price	$ 0.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember	$ 3.71us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember	$ 4.10us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_WarrantMember
US Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 9.19us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember	$ 11.19us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 11 months 5 days	6 years 9 months 22 days
Common Stock, Shares, Outstanding	3,550,956us-gaap_CommonStockSharesOutstanding / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Weighted Average Remaining Contractual Term, Warrants Vested and Expect to Vest	2 years 1 month 13 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	4,253,465us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 9.28us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	6 years 10 months 2 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	2,265,850us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 6.72us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options and Non-Option Equity Instruments, Outstanding [Roll Forward]
Stock Options, Outstanding at December 31, 2011	2,932,191us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Stock Options Exercised	(48,987)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Stock Options Forfeited	(353,116)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Stock Options Expired	(368,704)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Stock Options, Outstanding at September 30, 2012	4,427,234us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember	2,932,191us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$ 12.94us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price	$ 6.78us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 5.53us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	2,968,379us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price	$ 10.22us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice / nbs_StockOptionsActivityAxis = nbs_UsEquityPlanMember
Options, Vested, weighted Average Remaining Contractual Term	6 years 1 month 10 days

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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