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STOCKHOLDERS' EQUITY (Details 1) (Common Stock Option [Member], USD $)
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3 Months Ended |
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Mar. 31, 2015
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Common Stock Option [Member]
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| Number of Options | |
| Options outstanding, beginning |
3,017,690us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Granted |
65,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Cancelled | |
| Forfeited |
418,349us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Exercised | |
| Options outstanding, ending |
2,664,342us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Options Exercisable |
1,239,781MARA_OptionsExercisable / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Options expected to vest |
1,424,560MARA_OptionsExpectedToVest / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Weighted Average Exercise Price | |
| Weighted average exercise price, beginning balance |
$ 4.64us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Granted |
$ 6.92us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Cancelled | |
| Forfeited |
$ 5.71us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Exercised | |
| Weighted average exercise price, ending balance |
$ 4.52us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Weighted average fair value of options granted during the period |
$ 2.12MARA_WeightedAverageFairValueOfOptionsGrantedDuringPeriod / us-gaap_StatementEquityComponentsAxis = MARA_CommonStockOptionMember |
| Weighted Average Remaining Life | |
| Weighted Average Remaining Life, beginning | 7 years 9 months 7 days |
| Granted | 4 years 11 months 5 days |
| Forfeited | 9 years 2 months 8 days |
| Weighted Average Remaining Life, ending | 7 years 1 month 28 days |
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- Details
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- Definition
Options Exercisable. No definition available.
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- Definition
Options expected to vest. No definition available.
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- Details
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- Definition
Weighted average fair value of options granted during the period. No definition available.
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- Details
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- Definition
Weighted Average Remaining Life, beginning. No definition available.
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- Definition
Weighted Average Remaining Life, ending. No definition available.
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- Definition
No authoritative reference available. No definition available.
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- Definition
No authoritative reference available. No definition available.
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- Definition
For presentations that combine terminations, 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 or that expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average price of options that were either forfeited or expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- 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
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- Definition
Gross number of share options (or share units) granted during the period. No definition available.
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- Definition
Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- 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
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- Definition
Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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- Definition
Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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- Definition
Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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