Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' EQUITY (Details Narrative)

v2.4.1.9
STOCKHOLDERS' EQUITY (Details Narrative) (USD $)
0 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended
Jun. 24, 2013
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Sep. 30, 2014
May 30, 2014
Apr. 30, 2014
Dec. 07, 2011
Dec. 06, 2011
Common stock, shares authorized   200,000,000us-gaap_CommonStockSharesAuthorized 200,000,000us-gaap_CommonStockSharesAuthorized 200,000,000us-gaap_CommonStockSharesAuthorized       200,000,000us-gaap_CommonStockSharesAuthorized 75,000,000us-gaap_CommonStockSharesAuthorized
Common stock, par value   $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare       $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Preferred stock, shares authorized   50,000,000us-gaap_PreferredStockSharesAuthorized 50,000,000us-gaap_PreferredStockSharesAuthorized 50,000,000us-gaap_PreferredStockSharesAuthorized       50,000,000us-gaap_PreferredStockSharesAuthorized  
Preferred stock, par value   $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare       $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare  
Reverse stock split ratio one (1) for thirteen (13) basis                
Warrants issued     770,788us-gaap_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationWarrantsIssued1            
Warrants Exercised     214,846us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised            
Warrants forfeited     46,154us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations            
Stock based compensation expense, warrants     $ 41,575MARA_StockBasedCompensationExpenseWarrants            
Proceeds from share issuance   6,388,266us-gaap_ProceedsFromIssuanceOfCommonStock   5,777,596us-gaap_ProceedsFromIssuanceOfCommonStock          
Stock-based prepaid expense   (400,471)us-gaap_IncreaseDecreaseInPrepaidExpense   29,571us-gaap_IncreaseDecreaseInPrepaidExpense          
Unrecognized compensation expense - warrants   3,465us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions 3,465us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions            
Warrants   1,926,308us-gaap_ClassOfWarrantOrRightOutstanding 1,926,308us-gaap_ClassOfWarrantOrRightOutstanding            
Preferred Stock [Member]                  
Shares issued, new         200,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
782,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
2,047,158us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
   
Value of shares issued           2,807,380us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
     
Warrants issued             511,790us-gaap_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationWarrantsIssued1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
   
Warrant Exercise Price             $ 3.75invest_InvestmentWarrantsExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
   
Common Stock 1 [Member]                  
Shares issued, new     4,808us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock1Member
           
Proceeds from share issuance     25,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock1Member
           
Grant date fair value (per share)     $ 3.90us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock1Member
           
Common Stock 2 [Member]                  
Shares issued, new     61,538us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock2Member
           
Common Stock 3 [Member]                  
Shares issued, new     923,076us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock3Member
           
Value of shares issued     2,280,000us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock3Member
           
Grant date fair value (per share)     $ 2.47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock3Member
           
Common Stock 4 [Member]                  
Shares issued, new     46,154us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock4Member
           
Grant date fair value (per share)     $ 2.925us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock4Member
           
Common Stock 5 [Member]                  
Shares issued, new     1,999,996us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock5Member
           
Proceeds from share issuance     5,200,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock5Member
           
Placement agent fees     170,000us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock5Member
           
Placement agent fees, previously paid as a retainer     30,000us-gaap_PaymentOfFinancingAndStockIssuanceCosts
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock5Member
           
Common Stock 6 [Member]                  
Shares issued, new     23,076us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock6Member
           
Value of shares issued     58,000us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock6Member
           
Grant date fair value (per share)     $ 2.515us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock6Member
           
Common Stock 7 [Member]                  
Shares issued, new     192,308us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock7Member
           
Value of shares issued     506,250us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock7Member
           
Grant date fair value (per share)     $ 2.635us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock7Member
           
Stock-based consulting expense     506,250us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock7Member
           
Common Stock 8 [Member]                  
Shares issued, new     134,616us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock8Member
           
Value of shares issued     306,251us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock8Member
           
Grant date fair value (per share)     $ 2.275us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock8Member
           
Stock-based prepaid expense     306,256us-gaap_IncreaseDecreaseInPrepaidExpense
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock8Member
           
Common Stock 9 [Member]                  
Shares issued, new     8,760us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock9Member
           
Value of shares issued     30,000us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock9Member
           
Grant date fair value (per share)     $ 3.425us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock9Member
           
Common Stock 10 [Member]                  
Shares issued, new     11,392us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock10Member
           
Value of shares issued     29,620us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock10Member
           
Warrant Exercise Price     $ 3.25invest_InvestmentWarrantsExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock10Member
           
Grant date fair value (per share)     $ 2.60us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock10Member
           
Common Stock 11 [Member]                  
Shares issued, new     307,692us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock11Member
           
Proceeds from share issuance     800,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock11Member
           
Warrant Exercise Price     $ 3.25invest_InvestmentWarrantsExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock11Member
           
Placement agent fees     35,029us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock11Member
           
Placement agent fees, previously paid as a retainer     42,375us-gaap_PaymentOfFinancingAndStockIssuanceCosts
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock11Member
           
Common Stock 12 [Member]                  
Shares issued, new     60,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock12Member
           
Value of shares issued     818,000us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock12Member
           
Grant date fair value (per share)     $ 13.63us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock12Member
           
Common Stock 13 [Member]                  
Shares issued, new     300,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock13Member
           
Value of shares issued     718,500us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock13Member
           
Grant date fair value (per share)     $ 2.39us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock13Member
           
Common Stock 14 [Member]                  
Shares issued, new     9,616us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock14Member
           
Proceeds from share issuance     25,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock14Member
           
Common Stock 15 [Member]                  
Shares issued, new     48,078us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock15Member
           
Common Stock 16 [Member]                  
Shares issued, new     200,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock16Member
           
Value of shares issued     980,000us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock16Member
           
Grant date fair value (per share)     $ 4.90us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock16Member
           
Common Stock 17 [Member]                  
Shares issued, new     26,722us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock17Member
           
Common Stock 18 [Member]                  
Shares issued, new     6,178us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock18Member
           
Value of shares issued     45,995us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock18Member
           
Common Stock 19 [Member]                  
Shares issued, new     50,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock19Member
           
Value of shares issued     $ 28,100us-gaap_StockIssuedDuringPeriodValueIssuedForNoncashConsiderations
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock19Member
           
Grant date fair value (per share)     $ 5.62us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock19Member
           
Common Stock 20 [Member]                  
Shares issued, new     84,652us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock20Member
           
Common Stock 21 [Member]                  
Shares issued, new     29,230us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= MARA_CommonStock21Member