Quarterly report pursuant to Section 13 or 15(d)

Stock Plans (Details 1)

v2.4.1.9
Stock Plans (Details 1) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Share-based Goods and Nonemployee Services Transaction [Line Items]    
Weighted-average risk-free interest rate 1.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 2.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Expected dividend payments $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendPayments $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendPayments
Expected holding period (years) 6 years 4 months 24 days [1] 6 years 6 months [1]
Weighted-average volatility factor 1.61%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate [2] 1.66%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate [2]
Estimated forfeiture rates for options granted 30.00%ttnp_EstimatedForfeitureRatesForOptionsGrantedToManagement [3] 31.00%ttnp_EstimatedForfeitureRatesForOptionsGrantedToManagement [3]
[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.
[3] Estimated forfeiture rates are based on historical data.