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STOCKHOLDERS' EQUITY (Details) (USD $)
3 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 23, 2015
Mar. 31, 2010
Dec. 31, 2014
Dec. 31, 2013
Mar. 09, 2015
Class of Warrant or Right [Line Items]            
Consideration per market price 85.00%bios_ClassofWarrantorRightExercisePriceofWarrantsorRightsPercentageofMarketPrice          
Carrying value of 2015 Warrants $ 2,900,000us-gaap_WarrantsAndRightsOutstanding          
2015 Warrants [Member]            
Class of Warrant or Right [Line Items]            
Additional contribution by investors   483,559bios_ProceedsfromModificationofWarrantTerms
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_TwoThousandFifteenWarrantsMember
       
Term of warrants 10 years          
Cap on ownership after conversion, percent 19.99%bios_StockPurchaseAgreementTermsofConversionVotingCaponCommonStockOwnershipAfterConversionPercent
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_TwoThousandFifteenWarrantsMember
         
Carrying value of 2015 Warrants           $ 2,942,000us-gaap_WarrantsAndRightsOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_TwoThousandFifteenWarrantsMember
Class A Warrants            
Class of Warrant or Right [Line Items]            
Warrants issued (in shares)           1,800,000us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_ClassAWarrantsMember
Exercise price of warrants (in dollars per share)   $ 5.17us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_ClassAWarrantsMember
      $ 5.17us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_ClassAWarrantsMember
Class A Warrants Prior to Addendum            
Class of Warrant or Right [Line Items]            
Exercise price of warrants (in dollars per share)           $ 5.295us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_ClassAWarrantsPriortoAddendumMember
Class B Warrants            
Class of Warrant or Right [Line Items]            
Warrants issued (in shares)           1,800,000us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_ClassBWarrantsMember
Exercise price of warrants (in dollars per share)   $ 6.45us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_ClassBWarrantsMember
      $ 6.45us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_ClassBWarrantsMember
Class B Warrants Prior to Addendum            
Class of Warrant or Right [Line Items]            
Exercise price of warrants (in dollars per share)           $ 6.595us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_ClassBWarrantsPriortoAddendumMember
2010 Warrants [Member]            
Class of Warrant or Right [Line Items]            
Exercise price of warrants (in dollars per share)     $ 10.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_TwoThousandTenWarrantsMember
     
Term of warrants     5 years      
Warrants issued (in shares)     3,400,000bios_ClassOfWarrantOrRightIssued
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_TwoThousandTenWarrantsMember
     
Warrants exercised (in shares)       0bios_WarrantsExercised
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_TwoThousandTenWarrantsMember
   
Warrant | 2010 Warrants [Member]            
Class of Warrant or Right [Line Items]            
Common stock issued pursuant to exercise of warrants (in shares)         78,567us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_TwoThousandTenWarrantsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Warrants exercised in cashless exercise (in shares)         256,175bios_WarrantsExercisedInCashlessExercise
/ us-gaap_ClassOfWarrantOrRightAxis
= bios_TwoThousandTenWarrantsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Series A Preferred Stock            
Class of Warrant or Right [Line Items]            
Cap on ownership after conversion, percent 19.99%bios_StockPurchaseAgreementTermsofConversionVotingCaponCommonStockOwnershipAfterConversionPercent
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember