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Stockholders' Equity (Narrative) (Details) (USD $)
 0 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 0 Months Ended
Aug. 07, 2013
Jul. 10, 2012
May 10, 2012
Jun. 30, 2014
Dec. 31, 2014
item
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2009
Nov. 27, 2013
May 31, 2012
Aug. 13, 2013
Aug. 16, 2013
Jul. 09, 2012
Jul. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Votes per share         1stxs_VotesPerShare                  
Dividends declared         $ 0us-gaap_DividendsPayableCurrentAndNoncurrent                  
Dividends paid         0us-gaap_PaymentsOfDividends                  
Stock issued, value         2,853,673us-gaap_StockIssuedDuringPeriodValueNewIssues 64,594,513us-gaap_StockIssuedDuringPeriodValueNewIssues 10,411,675us-gaap_StockIssuedDuringPeriodValueNewIssues              
Reverse stock split   0.1us-gaap_StockholdersEquityNoteStockSplitConversionRatio1                        
Common stock authorized         300,000,000us-gaap_CommonStockSharesAuthorized 300,000,000us-gaap_CommonStockSharesAuthorized             100,000,000us-gaap_CommonStockSharesAuthorized  
Common stock authorized due to Amendment   300,000,000stxs_IncreaseInCommonStockSharesAuthorized                        
Common stock par value         $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare                
Warrants         2,197,883us-gaap_ClassOfWarrantOrRightOutstanding 3,021,302us-gaap_ClassOfWarrantOrRightOutstanding                
Net proceeds from sale of securities         9,100,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement                  
Paydown of the guarantees         7,000,000stxs_RepaymentOfLenderGuarantee                  
Number of shares issued upon conversion of warrants 183,478us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities                          
Aggregate number of shares issued upon conversion of subscription rights and warrants 262,450us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights                          
Total compensation cost not yet recognized related to options, stock appreciation rights and non-vested stock granted to employees         1,600,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized                  
Estimated forfeitures         1,500,000us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationForfeited                  
Total compensation cost not yet recognized related to options, stock appreciation rights and non-vested stock granted to employees, period of amortization, in years         2 years                  
Weighted average remaining life         7 years 6 months                  
Weighted average exercise price per vested share         $ 46.83stxs_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedWeightedAverageExercisePrice                  
Number of options currently exercisable         148,370us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber                  
Weighted average remaining life of vested options outstanding         3 years 6 months 29 days                  
Closing stock price     $ 3.413stxs_FairValueAssumptionsClosingStockPrice   $ 1.48stxs_FairValueAssumptionsClosingStockPrice                  
Proceeds from options exercised         0us-gaap_ProceedsFromStockOptionsExercised   0us-gaap_ProceedsFromStockOptionsExercised              
Restricted stock         0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber                  
Intrinsic value of restricted shares outstanding         0stxs_IntrinsicValueOfRestrictedSharesOutstanding                  
Intrinsic value of restricted stock units outstanding         1,000,000stxs_IntrinsicValueOfRestrictedStockUnitsOutstanding                  
Intrinsic value of vested restricted shares         100,000stxs_IntrinsicValueOfRestrictedSharesVested                  
Intrinsic value of vested restricted stock units         1,100,000stxs_IntrinsicValueOfRestrictedStockUnitsVested                  
Number of Options/SARs, Exercised         0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised                  
Weighted Average Exercise Price per Share, Granted         $ 4.04us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice                  
Adjustment for forfiture rate         100,000stxs_AdjustmentOfForfitureRateResultingReductionOfShareBasedCompensation                  
Shares authorized under plan         250,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized                  
Percentage of compensation eligible employees can use to purchase common stock, maximum               15.00%stxs_Employeestockpurchaseplanmaximumpercentageofcompensationtopurchasesharesbyeligibleparticipants            
Compensation amount eligible employees can use to purcahse common stock, maximum               25,000stxs_Employeestockpurchaseplanemployeecontributionamount            
Percentage of fair value eligible employees can purchase common stock               95.00%stxs_Employeestockpurchaseplanminimumpercentageofcommonstockfairvaluedefinedtopurchasesharesbyeligibleparticipants            
Approved proposal to increase ESPP number of shares issued       250,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized                    
Shares available under ESPP         250,000stxs_EmployeeStockPurchasePlanSharesAvailable                  
2012 Stock Incentive Plan [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Options, expiration term         10 years                  
Exercise price as percentage of fair value         100.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_PlanNameAxis
= stxs_StockIncentivePlan2012Member		                  
Director [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Options, expiration term         10 years                  
Exercise price as percentage of fair value         100.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember		                  
Initial Grant [Member] | Director [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Option vesting period         2 years                  
Annual Grants [Member] | Director [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Option vesting period         1 year                  
Incentive Stock Options [Member] | 2012 Stock Incentive Plan [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Option vesting period         3 years                  
Incentive Stock Options [Member] | First Anniversary [Member] | 2012 Stock Incentive Plan [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Option vesting, percentage         25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= stxs_IncentiveStockOptionsMember
/ us-gaap_PlanNameAxis
= stxs_StockIncentivePlan2012Member
/ us-gaap_VestingAxis
= stxs_FirstAnniversaryMember		                  
Incentive Stock Options [Member] | Subsequent Monthly Vesting [Member] | 2012 Stock Incentive Plan [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Option vesting, percentage         2.0833%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= stxs_IncentiveStockOptionsMember
/ us-gaap_PlanNameAxis
= stxs_StockIncentivePlan2012Member
/ us-gaap_VestingAxis
= stxs_SubsequentMonthlyVestingMember		                  
Stock Appreciation Rights (SARs) [Member] | 2012 Stock Incentive Plan [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Options, expiration term         10 years                  
Option vesting period         3 years                  
Stock Appreciation Rights (SARs) [Member] | First Anniversary [Member] | 2012 Stock Incentive Plan [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Option vesting, percentage         25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
/ us-gaap_PlanNameAxis
= stxs_StockIncentivePlan2012Member
/ us-gaap_VestingAxis
= stxs_FirstAnniversaryMember		                  
Stock Appreciation Rights (SARs) [Member] | Subsequent Monthly Vesting [Member] | 2012 Stock Incentive Plan [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Option vesting, percentage         2.0833%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
/ us-gaap_PlanNameAxis
= stxs_StockIncentivePlan2012Member
/ us-gaap_VestingAxis
= stxs_SubsequentMonthlyVestingMember		                  
Time Based Restricted Shares [Member] | 2012 Stock Incentive Plan [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Option vesting period         3 years                  
Restricted Stock Units [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Option vesting period         4 years                  
Restricted stock         697,751us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		 588,759us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		                
Restricted Shares [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Restricted stock           6,600us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		                
Rights [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock issued, shares                 3,400,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_RightsMember		          
Stock issued, value                 10,200,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_RightsMember		          
Pre-Stock Split [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Common stock outstanding   78,000,000us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementScenarioAxis
= stxs_PreStockSplitMember		                        
Post-Stock Split [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Common stock outstanding   7,800,000us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementScenarioAxis
= stxs_PostStockSplitMember		                        
Shares sold in private placement                   2,170,000stxs_PrivatePlacementSharesIssued
/ us-gaap_StatementScenarioAxis
= stxs_PostStockSplitMember		        
Warrants sold in private placement                   2,170,000stxs_PrivatePlacementWarrantsIssued
/ us-gaap_StatementScenarioAxis
= stxs_PostStockSplitMember		        
Duration period of warrants         6 years                  
Share price of shares sold in private placement                   $ 3.361stxs_PrivatePlacementPurchasePriceOfStock
/ us-gaap_StatementScenarioAxis
= stxs_PostStockSplitMember		        
Share price of warrants sold in private placement                   $ 1.25stxs_PrivatePlacementPurchasePriceOfWarrants
/ us-gaap_StatementScenarioAxis
= stxs_PostStockSplitMember		        
Exercise price of warrants                   $ 3.361stxs_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_StatementScenarioAxis
= stxs_PostStockSplitMember		        
Revolving Line Of Credit [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Guarantee of credit facility by lenders                           3,000,000us-gaap_GuaranteeObligationsMaximumExposure
/ us-gaap_LongtermDebtTypeAxis
= stxs_RevolvingLineOfCreditMember
Maximum [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Intrinsic value of options and stock appreciation rights outstanding         0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                  
Proceeds from options exercised           100,000us-gaap_ProceedsFromStockOptionsExercised
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                
Warrrant Exercise Price $1.98 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Warrants                           113,636us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrrantExercisePriceOnePointNinetyEightMember
Exercise price of warrants 1.98stxs_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrrantExercisePriceOnePointNinetyEightMember		                         $ 1.98stxs_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrrantExercisePriceOnePointNinetyEightMember
Aggregate number of shares issued upon conversion of subscription rights and warrants 75,758us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrrantExercisePriceOnePointNinetyEightMember		                          
Warrant Exercise Price $1.55 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Warrants                           48,387us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrantIssuanceOneMember
Exercise price of warrants                           $ 1.55stxs_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrantIssuanceOneMember
Warrant Exercise Price $5.24 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Warrants                           14,313us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrantIssuanceTwoMember
Exercise price of warrants                           $ 5.24stxs_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrantIssuanceTwoMember
Warrrant Exercise Price $3.361 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Exercise price of warrants 3.361stxs_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrrantExercisePriceThreePointThreeSixtyOneMember		                          
Aggregate number of shares issued upon conversion of subscription rights and warrants 156,204us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrrantExercisePriceThreePointThreeSixtyOneMember		                          
Warrrant Exercise Price $4.10 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Exercise price of warrants 4.10stxs_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrrantExercisePriceFourPointTenMember		                          
Aggregate number of shares issued upon conversion of subscription rights and warrants 30,488us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_WarrrantExercisePriceFourPointTenMember		                          
Sanderling Ventures PIPE Warrants [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Number of shares issued upon conversion of warrants                     308,194us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_SanderlingVenturesPipeWarrantsMember		      
Aggregate number of shares issued upon conversion of subscription rights and warrants                     650,619us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_SanderlingVenturesPipeWarrantsMember		      
Proceeds from the exercise of stock warrants                     0us-gaap_ProceedsFromWarrantExercises
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_SanderlingVenturesPipeWarrantsMember		      
Franklin Templeton PIPE Warrants [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Aggregate number of shares issued upon conversion of subscription rights and warrants                       650,618us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_FranklinTempletonPipeWarrantsMember		    
Proceeds from the exercise of stock warrants                       2,186,727us-gaap_ProceedsFromWarrantExercises
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_FranklinTempletonPipeWarrantsMember		    
Alafi Capital Company PIPE Warrants [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Aggregate number of shares issued upon conversion of subscription rights and warrants                       261,241us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_AlafiCapitalCompanyPipeWarrantsMember		    
Proceeds from the exercise of stock warrants                       $ 878,031us-gaap_ProceedsFromWarrantExercises
/ us-gaap_ClassOfWarrantOrRightAxis
= stxs_AlafiCapitalCompanyPipeWarrantsMember