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Stock-Based Compensation - Additional Information (Detail) (USD $)
0 Months Ended 3 Months Ended 12 Months Ended
Sep. 03, 2013
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2011
Dec. 31, 2009
Jun. 19, 2012
Oct. 29, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stockholders equity note, stock split, conversion ratio 1.1533us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 0.2us-gaap_StockholdersEquityNoteStockSplitConversionRatio1            
Share-based compensation arrangement by share-based payment award, options, grants in period, gross     2,422,309us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 603,139us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross        
Share-based compensation     $ 1,840,000us-gaap_ShareBasedCompensation $ 941,000us-gaap_ShareBasedCompensation        
Share based compensation, expense recognized     0us-gaap_AllocatedShareBasedCompensationExpense          
Share-based compensation arrangement by share-based payment award, options, outstanding, intrinsic value     6,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue          
Share-based compensation arrangement by share-based payment award, options, exercisable, intrinsic value     4,800,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1          
Share-based compensation arrangement by share-based payment award, options, vested and expected to vest, outstanding, aggregate intrinsic value     6,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue          
Share-based compensation arrangement by share-based payment award, options, vested in period, fair value     1,054,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 880,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1        
Employee service share-based compensation, nonvested awards, Compensation cost not yet recognized, total     3,818,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized          
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition     2 years 10 months 24 days          
Merger Agreement [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stockholders equity note, stock split, conversion ratio 1.1533us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_BusinessAcquisitionAxis
= trxc_MergerAgreementMember
             
Unvested Options [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation arrangement by share-based payment award, options, grants in period, gross     2,422,309us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= trxc_UnvestedOptionsMember
603,139us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= trxc_UnvestedOptionsMember
       
Share-based compensation arrangement by share-based payment award, options, grants in period, weighted average grant date fair value     $ 2.87trxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnvestedOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= trxc_UnvestedOptionsMember
$ 0.95trxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnvestedOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= trxc_UnvestedOptionsMember
       
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value     $ 996,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= trxc_UnvestedOptionsMember
$ 348,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= trxc_UnvestedOptionsMember
       
June 19, 2012 Amendment [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common stock, capital shares reserved for future issuance             1,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardDateAxis
= trxc_AmendmentOneMember
 
October 29, 2013 Amendment [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common stock, capital shares reserved for future issuance               4,940,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardDateAxis
= trxc_AmendmentTwoMember
Incentive Compensation Plan 2006 [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation arrangement by share-based payment award, options, grants in period, gross     80,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= trxc_IncentiveCompensationPlan2006Member
  3,378,189us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= trxc_IncentiveCompensationPlan2006Member
1,110,053us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= trxc_IncentiveCompensationPlan2006Member
   
Stock appreciation rights maximum term     10 years          
Incentive Compensation Plan 2007 [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation arrangement by share-based payment award, maximum number of shares per employee     500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee
/ us-gaap_PlanNameAxis
= trxc_IncentiveCompensationPlan2007Member
100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee
/ us-gaap_PlanNameAxis
= trxc_IncentiveCompensationPlan2007Member
       
Incentive Compensation Plan 2007 [Member] | Stock Appreciation Rights (SARs) [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation arrangement by share-based payment award, maximum number of shares per employee     1,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee
/ us-gaap_AwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
/ us-gaap_PlanNameAxis
= trxc_IncentiveCompensationPlan2007Member
200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee
/ us-gaap_AwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
/ us-gaap_PlanNameAxis
= trxc_IncentiveCompensationPlan2007Member