Value of option awards calculated in accordance with FASB ASC Topic 718, using the Black-Scholes option-pricing model Value of option awards calculated in accordance with FASB ASC Topic 718, using the Black-Scholes option-pricing model [Member] Fair value of equity awards granted in covered fiscal year and that are unvested at end of such covered fiscal year – valued at year-end Fair Value of Equity Awards Granted in Covered Fiscal Year and that are Unvested at End of Such Covered Fiscal Year– Valued at Year-End [Member] Fair value of equity awards granted in covered fiscal year that vested during such covered fiscal year – valued on date of vesting FairVvalue of Equity Awards Granted in Covered Fiscal Year that Vested During Such Covered Fiscal Year Valued onDdate of Vesting [Member] Change in fair value from end of prior fiscal year to end of covered fiscal year for awards made in prior fiscal years that were unvested at end of current fiscal year Change in Fair Value from End of Prior Fiscal Year to End of Covered Fiscal Year for Awards Made in Prior Fiscal Years that were Unvested at End of Current Fiscal Year [Member] Change in fair value from end of prior fiscal year to vesting date for awards made in prior fiscal years that vested during covered fiscal year Change in Fair Value from End of Prior Fiscal Year to Vesting Date for Awards Made in Prior Fiscal Years that Vested During Covered Fiscal Year [Member]