Stockholders' Equity - Activity of Stock Options (Detail) (USD $)
|
12 Months Ended | |
---|---|---|
Dec. 31, 2014
|
Dec. 31, 2013
|
|
Options Outstanding, Number of Shares | ||
Beginning Balance (in shares) | 5,422,130us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | |
Forfeited (in shares) | (1,660,354)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod | (693,644)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod |
Exercised (in shares) | (321,696)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | (137,097)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised |
Granted (in shares) | 992,452us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod | 687,840us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod |
Ending Balance (in shares) | 4,289,631us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | |
Options Outstanding, Price per Share Range | ||
Beginning Balance, lower limit (in dollars per share) | $ 0.35luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimitBalance | $ 0.35luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimitBalance |
Beginning Balance, upper limit (in dollars per share) | $ 6.55luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperLimit | $ 6.74luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperLimit |
Forfeited, lower limit (in dollars per share) | $ 0.35luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansForfeituresInPeriodExercisePriceRangeLowerRangeLimit | $ 0.35luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansForfeituresInPeriodExercisePriceRangeLowerRangeLimit |
Forfeited, upper limit (in dollars per share) | $ 6.55luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansForfeituresInPeriodExercisePriceRangeUpperRangeLimit | $ 6.74luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansForfeituresInPeriodExercisePriceRangeUpperRangeLimit |
Exercised, lower limit (in dollars per share) | $ 0.35luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisedInPeriodExercisePriceRangeLowerRangeLimit | $ 0.35luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisedInPeriodExercisePriceRangeLowerRangeLimit |
Exercised, upper limit (in dollars per share) | $ 1.27luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisedInPeriodExercisePriceRangeUpperRangeLimit | $ 1.18luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisedInPeriodExercisePriceRangeUpperRangeLimit |
Granted, lower limit (in dollars per share) | $ 1.37luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansGrantsInPeriodExercisePriceRangeLowerRangeLimit | $ 1.20luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansGrantsInPeriodExercisePriceRangeLowerRangeLimit |
Granted, upper limit (in dollars per share) | $ 1.53luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansGrantsInPeriodExercisePriceRangeUpperRangeLimit | $ 1.31luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansGrantsInPeriodExercisePriceRangeUpperRangeLimit |
Ending Balance, lower limit (in dollars per share) | $ 0.35luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimitBalance | $ 0.35luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimitBalance |
Ending Balance, upper limit (in dollars per share) | $ 6.55luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperLimit | $ 6.55luna_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperLimit |
Options Outstanding, Weighted Average Exercise Price | ||
Beginning balance (in dollars per share) | $ 2.19us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | |
Forfeited (in dollars per share) | $ 2.22us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice | $ 2.08us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice |
Exercised (in dollars per share) | $ 0.73us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice | $ 0.56us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice |
Granted (in dollars per share) | $ 1.43us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice | $ 1.29us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice |
Ending balance (in dollars per share) | $ 1.93us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | |
Options Outstanding, Aggregate Intrinsic Value beginning balance (in shares) | $ 784,154us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue | $ 639,904us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue |
Options Outstanding, Aggregate Intrinsic Value ending balance (in shares) | 512,901us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue | 784,154us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue |
Options Exercisable, beginning balance (in shares) | 3,775,388us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber | |
Options Exercisable, ending balance (in shares) | 3,111,199us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber | |
Options Exercisable, Weighted Average Exercise Price, beginning balance (in dollars per share) | $ 2.37us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice | |
Options Exercisable, Weighted Average Exercise Price, ending balance (in dollars per share) | $ 2.11us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice | |
Options Exercisable, Aggregate Intrinsic Value, beginning balance | 697,826us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 | 604,292us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 |
Options Exercisable, Aggregate Intrinsic Value, ending balance | $ 453,032us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 | $ 697,826us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 |
X | ||||||||||
- Definition
Share Based Compensation, Shares Authorized under Stock Option Plans, Exercised in Period, Exercise Price Range, Lower Range Limit No definition available.
|
X | ||||||||||
- Definition
Share Based Compensation, Shares Authorized under Stock Option Plans, Exercised in Period, Exercise Price Range, Upper Range Limit No definition available.
|
X | ||||||||||
- Details
|
X | ||||||||||
- Definition
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit Balance No definition available.
|
X | ||||||||||
- Definition
Share Based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Limit No definition available.
|
X | ||||||||||
- Definition
Share Based Compensation, Shares Authorized under Stock Option Plans, Forfeitures in Period, Exercise Price Range, Lower Range Limit No definition available.
|
X | ||||||||||
- Definition
Share Based Compensation, Shares Authorized under Stock Option Plans, Forfeitures in Period, Exercise Price Range, Upper Range Limit No definition available.
|
X | ||||||||||
- Definition
Share Based Compensation, Shares Authorized under Stock Option Plans, Grants in Period, Exercise Price Range, Lower Range Limit No definition available.
|
X | ||||||||||
- Definition
Share Based Compensation, Shares Authorized under Stock Option Plans, Grants in Period, Exercise Price Range, Upper Range Limit No definition available.
|
X | ||||||||||
- Definition
Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Details
|
X | ||||||||||
- Definition
Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Details
|
X | ||||||||||
- Definition
Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
|
X | ||||||||||
- Definition
Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
|
X | ||||||||||
- Definition
Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
|
X | ||||||||||
- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|