XML 64 R49.htm IDEA: XBRL DOCUMENT v2.4.1.9
Stock-Based Compensation (Details Narrative) (USD $)
3 Months Ended 1 Months Ended
Mar. 31, 2015
Sep. 30, 2010
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award expiration period 10 years    
Forfeiture Period after Ending Employment 90 days    
Options exercised, intrinsic value $ 100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue    
Weighted average grant date fair value of options granted (in dollars per share) $ 1.46us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue    
Estimated grant date fair value of options vested 2,700,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1    
Total unrecognized compensation cost related to stock options 10,200,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions    
Series B redeemable preferred stock 15,212,000us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsAmountNoncurrent   14,916,000us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsAmountNoncurrent
Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 9 months 1 day    
Restricted stock awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 9 months 0 days    
Phantom equity | 2011 Phantom Equity Appreciation Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share authorized (in shares)     1,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_PhantomShareUnitsPSUsMember
/ us-gaap_PlanNameAxis
= hear_PhantomEquityAppreciationPlan2011Member
Shares granted and outstanding (in shares) 784,661us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PhantomShareUnitsPSUsMember
/ us-gaap_PlanNameAxis
= hear_PhantomEquityAppreciationPlan2011Member
  807,578us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PhantomShareUnitsPSUsMember
/ us-gaap_PlanNameAxis
= hear_PhantomEquityAppreciationPlan2011Member
Weighted average exercise price of options granted and outstanding (in dollars per share) $ 0.89hear_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_PhantomShareUnitsPSUsMember
/ us-gaap_PlanNameAxis
= hear_PhantomEquityAppreciationPlan2011Member
  $ 0.88hear_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_PhantomShareUnitsPSUsMember
/ us-gaap_PlanNameAxis
= hear_PhantomEquityAppreciationPlan2011Member
Series B Redeemable Preferred Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued   1,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RedeemablePreferredStockMember
 
Fair value of shares issued   $ 12,400,000us-gaap_MandatorilyRedeemablePreferredStockFairValueDisclosure
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RedeemablePreferredStockMember
 
Par value (in dollars per share) $ 12.425371us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RedeemablePreferredStockMember
   
Non-Executives [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Forfeiture rate 10.00%hear_FairValueAssumptionsForfeitureRate
/ us-gaap_TitleOfIndividualAxis
= hear_NonExecutivesMember
   
Executive Officer [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Forfeiture rate 0.00%hear_FairValueAssumptionsForfeitureRate
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveOfficerMember