STOCKHOLDERS' EQUITY - Options (Details Narrative)

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STOCKHOLDERS' EQUITY - Options (Details Narrative)																														12 Months Ended
	Oct. 14, 2015 period installment $ / shares shares	Sep. 16, 2015 $ / shares shares	Apr. 07, 2015 USD ($) period $ / shares shares	Mar. 18, 2015 installment $ / shares shares	Mar. 06, 2015 installment $ / shares shares	Feb. 05, 2015 period $ / shares shares	Jan. 20, 2015	Oct. 31, 2014 period $ / shares shares	Sep. 16, 2014 period $ / shares shares	Aug. 29, 2014 period $ / shares shares	Jul. 18, 2014 shares	Jun. 18, 2014 shares	Jun. 15, 2014 period $ / shares shares	May. 15, 2014 period $ / shares shares	May. 14, 2014 period $ / shares shares	Apr. 15, 2014 period $ / shares shares	Nov. 18, 2013 USD ($) installment $ / shares shares	Nov. 11, 2013 USD ($) $ / shares shares	Aug. 19, 2013 item $ / shares shares	Jun. 28, 2013 item	Jun. 25, 2013 item $ / shares shares	Jun. 19, 2013 period employee item $ / shares shares	Jun. 11, 2013 period director $ / shares shares	May. 22, 2013	Apr. 17, 2013	Mar. 08, 2013 $ / shares shares	Mar. 01, 2013 period $ / shares shares	Jan. 28, 2013 period $ / shares shares	Nov. 14, 2012 period $ / shares shares	Dec. 31, 2015 USD ($)	Sep. 15, 2015 period	Dec. 31, 2014 USD ($)
Consulting Agreement Term																				1 year				1 year	12 months
Granted | shares		80,000
Number of consultants | item																				2
Option term	10 years
Option price | $ / shares	$ 1.86
Value of stock issued for services | $																														$ 900,500
Number of monthly installments | period			12													12
Expected term	6 years 6 months						6 years 6 months	5 years 9 months
Volatility	49.00%
Discount rate	1.57%
Unrecognized compensation expense, options | $																														$ 2,856,485
Intrinsic value, stock options outstanding | $																																$ 0
Consultants
Granted | shares	70,000
Option term	10 years
Option price | $ / shares	$ 1.86
Number of monthly installments | installment	24
Expected term	6 years 6 months
Volatility	49.00%
Discount rate	1.57%
Stock Option
Consulting Agreement Term																		3 years
Granted | shares			280,000	20,000	20,000	25,000		160,000	60,000	290,000			40,000			20,000		600,000	607,692		134,614	46,154
Number of term options | item																			2		4	2
Number of consultants | item																			2		4
Option term		10 years	10 years	5 years	5 years	5 years		10 years	5 years	10 years			5 years	10 years		5 years		5 years	5 years		5 years	5 years
Option price | $ / shares		$ 2.03	$ 6.76	$ 6.61	$ 7.37	$ 6.80		$ 6.40	$ 7.445	$ 5.62			$ 5.05			$ 3.295		$ 2.85	$ 2.925		$ 3.425	$ 2.47
Vesting on first anniversary (as a percent)																		33.00%	33.00%		33.00%	33.00%
Vesting on second anniversary (as a percent)																			33.00%		33.00%	33.00%
Vesting on third anniversary (as a percent)																		34.00%	34.00%		34.00%	34.00%
Value of stock issued for services | $																		$ 984,447
Number of employee | employee																						2
Percent vested upon execution of the GRQ Consulting Agreement			25.00%
Percent vested after execution			2.083%
Number of monthly installments	24			12	12	24			12				24																		12
Cancelled | shares												600,000
Number of annual installments | period								36		36
Expected term		5 years 6 months		3 years	3 years	3 years 3 months			3 years				3 years 3 months			3 years		2 years 6 months
Volatility		47.00%		41.00%	41.00%	47.00%	62.00%	53.00%	49.00%				50.00%			51.00%		100.00%
Discount rate		1.72%		0.92%	1.16%	0.92%	1.95%	1.78%	1.04%				1.05%			0.84%
Risk free interest rate																		0.65%
Monthly retainer | $			$ 27,000
Stock Option | Chief Financial Officer
Employment Agreement Term																	2 years											1 year
Granted | shares											19,114						230,000											76,924
Option term																	10 years											10 years
Option price | $ / shares																	$ 2.95											$ 3.25
Value of stock issued for services | $																	$ 511,036
Number of monthly installments | installment																	24
Number of annual installments | period																												3
Expected term																	5 years
Volatility																	101.00%
Risk free interest rate																	1.40%
Stock Option | Chief Technology Officer
Granted | shares																						19,230					153,846
Option term																											5 years
Option price | $ / shares																											$ 5.525
Number of monthly installments | period																											24
Cancelled | shares																						134,616
Stock Option | Chief Operating Officer
Employment Agreement Term																											2 years
Granted | shares																						76,924					76,924
Option term																											5 years
Option price | $ / shares																						$ 2.47					$ 5.525
Number of monthly installments | period																						24					24
Stock Option | Chief Executive Officer
Employment Agreement Term																													2 years
Granted | shares																	200,000												307,692
Option term																	10 years												10 years
Option price | $ / shares																	$ 2.965												$ 3.25
Value of stock issued for services | $																	$ 442,692
Number of monthly installments																	24												24
Expected term																	5 years												5 years
Volatility																	100.00%												192.00%
Risk free interest rate																	1.33%												0.61%
Stock Option | Chief Executive Officer And Two Directors
Granted | shares																							353,846
Option term																							5 years
Option price | $ / shares																							$ 2.625
Number of directors | director																							2
Number of monthly installments | period																							24
Stock Option | Existing Employees
Granted | shares															80,000
Option term															10 years
Option price | $ / shares															$ 4.165
Vesting on first anniversary (as a percent)															33.00%
Vesting on second anniversary (as a percent)															33.00%
Vesting on third anniversary (as a percent)															34.00%
Number of annual installments | period															3
Expected term															6 years 6 months
Volatility															63.00%
Discount rate															1.97%
Stock Option | Director
Granted | shares											7,608															15,384
Option term																										5 years
Option price | $ / shares																										$ 3.25
Vesting on first anniversary (as a percent)																										33.00%
Vesting on second anniversary (as a percent)																										33.00%
Vesting on third anniversary (as a percent)																										34.00%
Stock Option | Consultants
Option term															5 years
Stock Option | Consultant One Member
Granted | shares																							30,770
Option term																							5 years
Option price | $ / shares																							$ 2.625
Number of monthly installments | period																							24
Stock Option | Minimum
Percent Of Gross Proceeds																		2.00%
Stock Option | Maximum
Percent Of Gross Proceeds																		5.00%
Stock Option 2
Granted | shares								100,000
Option term								10 years
Option price | $ / shares								$ 6.40
Number of annual installments | period								36
Expected term								5 years 9 months
Volatility								53.00%
Discount rate								1.78%
Stock Option 2 | Consultants
Granted | shares															160,000
Option price | $ / shares															$ 4.165
Vesting on first anniversary (as a percent)															33.00%
Vesting on second anniversary (as a percent)															33.00%
Vesting on third anniversary (as a percent)															34.00%
Number of annual installments | period															3
Expected term															3 years 6 months
Volatility															50.00%
Discount rate															1.00%
Stock Option 3
Granted | shares								680,000						290,000
Option term								10 years
Option price | $ / shares								$ 6.40						$ 4.165
Number of monthly installments | period								24
Number of annual installments | period														36
Expected term								5 years 9 months						6 years 6 months
Volatility								53.00%						63.00%
Discount rate								1.78%						1.97%
Stock Option 4
Granted | shares								30,000
Option term								5 years
Option price | $ / shares								$ 6.40
Number of monthly installments | period								24
Expected term								3 years 3 months
Volatility								49.00%
Discount rate								1.03%
Time Based Shares
Granted | shares			70,000
Option price | $ / shares			$ 6.76
Expected term			6 years 3 months
Volatility			53.00%
Discount rate			1.53%
Time Based Shares | Minimum
Option price | $ / shares			$ 8.99
Performance Shares
Granted | shares			70,000
Option price | $ / shares			$ 6.76
Expected term			10 years
Volatility			61.00%
Discount rate			1.89%
Performance Shares | Minimum
Option price | $ / shares			$ 10.14

X

- Definition Represents the period of the consulting agreement is effective, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details Name: mara_ConsultingAgreementTerm Namespace Prefix: mara_ Data Type: xbrli:durationItemType Balance Type: na Period Type: duration

X

- Definition Represents the period of the employment agreement is effective, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details Name: mara_EmploymentAgreementTerm Namespace Prefix: mara_ Data Type: xbrli:durationItemType Balance Type: na Period Type: duration

X

- Definition Represents the number of consultants. + References No definition available. + Details Name: mara_NumberOfConsultants Namespace Prefix: mara_ Data Type: xbrli:integerItemType Balance Type: na Period Type: duration

X

- Definition Represents information pertaining to number of directors. + References No definition available. + Details Name: mara_NumberOfDirectors Namespace Prefix: mara_ Data Type: xbrli:integerItemType Balance Type: na Period Type: duration

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- Definition Represents information pertaining to number of employee. + References No definition available. + Details Name: mara_NumberOfEmployees Namespace Prefix: mara_ Data Type: xbrli:integerItemType Balance Type: na Period Type: duration

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- Definition Represents information pertaining to number of term options. + References No definition available. + Details Name: mara_NumberOfTermOptions Namespace Prefix: mara_ Data Type: xbrli:integerItemType Balance Type: na Period Type: duration

X

- Definition The percentage of gross proceeds to be paid. + References No definition available. + Details Name: mara_PercentOfGrossProceeds Namespace Prefix: mara_ Data Type: num:percentItemType Balance Type: na Period Type: duration

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- Definition Number of annual installments from grant date over which an equity-based award is paid + References No definition available. + Details Name: mara_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAnnualInstallments Namespace Prefix: mara_ Data Type: xbrli:integerItemType Balance Type: na Period Type: instant

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- Definition Number of monthly installments from grant date over which an equity-based award is paid. + References No definition available. + Details Name: mara_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfMonthlyInstallments Namespace Prefix: mara_ Data Type: xbrli:integerItemType Balance Type: na Period Type: instant

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage vested on first anniversary after execution of an agreement. + References No definition available. + Details Name: mara_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingPercentageFirstAnnivrsary Namespace Prefix: mara_ Data Type: num:percentItemType Balance Type: na Period Type: duration

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage vested on second anniversary after execution of an agreement. + References No definition available. + Details Name: mara_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingPercentageSecondAnnivrsary Namespace Prefix: mara_ Data Type: num:percentItemType Balance Type: na Period Type: duration

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage vested on third anniversary after execution of an agreement. + References No definition available. + Details Name: mara_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingPercentageThirdAnnivrsary Namespace Prefix: mara_ Data Type: num:percentItemType Balance Type: na Period Type: duration

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage vested after execution of an agreement. + References No definition available. + Details Name: mara_Sharebasedcompensationarrangementbysharebasedpaymentawardawardvestingpercentageafterexecution Namespace Prefix: mara_ Data Type: num:percentItemType Balance Type: na Period Type: instant

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage vested upon execution of an agreement. + References No definition available. + Details Name: mara_Sharebasedcompensationarrangementbysharebasedpaymentawardawardvestingpercentageuponexecution Namespace Prefix: mara_ Data Type: num:percentItemType Balance Type: na Period Type: instant

X

- Definition Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details Name: us-gaap_EmployeeRelatedLiabilitiesCurrent Namespace Prefix: us-gaap_ Data Type: xbrli:monetaryItemType Balance Type: credit Period Type: instant

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- Definition Unrecognized cost of unvested options awarded to employees as compensation. + References No definition available. + Details Name: us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions Namespace Prefix: us-gaap_ Data Type: xbrli:monetaryItemType Balance Type: debit Period Type: instant

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- Definition Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details Name: us-gaap_FairValueAssumptionsExpectedTerm Namespace Prefix: us-gaap_ Data Type: xbrli:durationItemType Balance Type: na Period Type: duration

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- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details Name: us-gaap_FairValueAssumptionsExpectedVolatilityRate Namespace Prefix: us-gaap_ Data Type: num:percentItemType Balance Type: na Period Type: duration

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- Definition Risk-free interest rate assumption used in valuing an instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details Name: us-gaap_FairValueAssumptionsRiskFreeInterestRate Namespace Prefix: us-gaap_ Data Type: num:percentItemType Balance Type: na Period Type: duration

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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details Name: us-gaap_FairValueInputsDiscountRate Namespace Prefix: us-gaap_ Data Type: num:percentItemType Balance Type: na Period Type: duration

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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details Name: us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod Namespace Prefix: us-gaap_ Data Type: xbrli:sharesItemType Balance Type: na Period Type: duration

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details Name: us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross Namespace Prefix: us-gaap_ Data Type: xbrli:sharesItemType Balance Type: na Period Type: duration

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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details Name: us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue Namespace Prefix: us-gaap_ Data Type: xbrli:monetaryItemType Balance Type: debit Period Type: instant

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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + Details Name: us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice Namespace Prefix: us-gaap_ Data Type: num:perShareItemType Balance Type: na Period Type: duration

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- Definition Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details Name: us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1 Namespace Prefix: us-gaap_ Data Type: xbrli:durationItemType Balance Type: na Period Type: duration

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- Definition Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders. + References No definition available. + Details Name: us-gaap_StockIssuedDuringPeriodValueIssuedForServices Namespace Prefix: us-gaap_ Data Type: xbrli:monetaryItemType Balance Type: credit Period Type: duration

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- Details Name: us-gaap_TitleOfIndividualAxis=mara_ConsultantsMember Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_AwardTypeAxis=us-gaap_StockOptionMember Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_TitleOfIndividualAxis=us-gaap_ChiefFinancialOfficerMember Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_TitleOfIndividualAxis=mara_ChiefTechnologyOfficerMember Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_TitleOfIndividualAxis=us-gaap_ChiefOperatingOfficerMember Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_TitleOfIndividualAxis=us-gaap_ChiefExecutiveOfficerMember Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_TitleOfIndividualAxis=mara_ExistingEmployeesMember Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_TitleOfIndividualAxis=us-gaap_DirectorMember Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_RangeAxis=us-gaap_MinimumMember Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_RangeAxis=us-gaap_MaximumMember Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_AwardTypeAxis=mara_StockOption3Member Namespace Prefix: Data Type: na Balance Type: Period Type:

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- Details Name: us-gaap_AwardTypeAxis=mara_StockOption4Member Namespace Prefix: Data Type: na Balance Type: Period Type:

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