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Commitments and Contingencies (Details) (USD $) | 3 Months Ended | 0 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Feb. 19, 2015 sqft Y
Operating Leases, Future Minimum Payments Due [Abstract] |  |  |
2015 | $ 1,439,300 us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear |  |
2016 | 2,039,300 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears |  |
2017 | 1,841,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears |  |
2018 | 1,023,800 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears |  |
2019 and thereafter | 1,909,200 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears |  |
Total minimum lease payments | 8,252,600 us-gaap_OperatingLeasesFutureMinimumPaymentsDue |  |
Operating lease expense | 400,000 us-gaap_LeaseAndRentalExpense | 200,000 us-gaap_LeaseAndRentalExpense |
CALIFORNIA |  |  |
Operating Leased Assets [Line Items] |  |  |
Operating lease, additional space rented | 4,000 nbs_OperatingLeasesAdditionalSpaceRented / us-gaap_StatementGeographicalAxis = stpr_CA |  |
NEW JERSEY |  |  |
Operating Leased Assets [Line Items] |  |  |
Operating lease, rentable space |  |  | 18,000 nbs_OperatingLeasesRentableSpace / us-gaap_StatementGeographicalAxis = stpr_NJ
Operating leases, monthly rental payments |  |  | 25,000 nbs_OperatingLeasesMonthlyRentalPayments / us-gaap_StatementGeographicalAxis = stpr_NJ
Operating leases, number of renewal terms |  |  | 2 nbs_OperatingLeasesNumberofRenewalTerms / us-gaap_StatementGeographicalAxis = stpr_NJ
Lessee leasing arrangements, operating leases, renewal term |  |  | 5 years
Proceeds from lease assignment |  |  | 580,000 nbs_ProceedsfromLeaseAssignment / us-gaap_StatementGeographicalAxis = stpr_NJ
Security deposit liability | $ 115,000 us-gaap_SecurityDepositLiability / us-gaap_StatementGeographicalAxis = stpr_NJ |  |

X
- Definition Operating Leases, Additional Space Rented + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition Operating Leases, Monthly Rental Payments + References No definition available. + Details
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Namespace Prefix: | nbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Operating Leases, Number of Renewal Terms + References No definition available. + Details
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Namespace Prefix: | nbs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating Leases, Rentable Space + References No definition available. + Details
Name: | nbs_OperatingLeasesRentableSpace
Namespace Prefix: | nbs_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds from Lease Assignment + References No definition available. + Details
Name: | nbs_ProceedsfromLeaseAssignment
Namespace Prefix: | nbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Details
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- Definition Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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Period Type: | instant

X
- Definition Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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X
- Definition Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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Period Type: | instant

X
- Definition Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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X
- Definition Amount of required minimum rental payments maturing in the remainder of the fiscal year following the latest fiscal year ended for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This element represents money paid in advance to protect the provider of a product or service, such as a lessor, against damage or nonpayment by the buyer or tenant (lessee) during the term of the agreement. Such damages may include physical damage to the property, theft of property, and other contractual breaches. Security deposits held may be interest or noninterest bearing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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Namespace Prefix: |
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Period Type: |

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