Annual report pursuant to Section 13 and 15(d)

Stock Plans (Details 2)

v2.4.1.9
Stock Plans (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Goods and Nonemployee Services Transaction [Line Items]      
Weighted-average risk-free interest rate 2.04%us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate 0.92%us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate 0.91%us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate
Expected dividend payments $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendPayments $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendPayments $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendPayments
Expected holding period (years) 6 years 5 months 16 days [1] 3 years 10 months 24 days [1] 5 years 1 month 6 days [1]
Weighted-average volatility factor 1.65%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate [2] 1.38%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate [2] 1.75%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate [2]
Estimated forfeiture rates for options granted 31.00%ttnp_EstimatedForfeitureRatesForOptionsGrantedToManagement 31.00%ttnp_EstimatedForfeitureRatesForOptionsGrantedToManagement 31.00%ttnp_EstimatedForfeitureRatesForOptionsGrantedToManagement
[1] Expected holding period is based on historical experience of similar awards, giving consideration to the contractual terms of the stock-based awards, vesting schedules and the expectations of future employee behavior.
[2] Weighted average volatility is based on the historical volatility of our common stock.