Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v2.4.1.9
Debt (Details) (USD $)
0 Months Ended
Sep. 17, 2014
Dec. 31, 2014
Feb. 04, 2015
Jan. 31, 2011
West Texas State Bank | Revolving Credit Facility        
Debt Instrument [Line Items]        
Maximum borrowing capacity 8,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_LineOfCreditFacilityAxis
= mpet_WestTexasStateBankMember
     
Outstanding balance on line of credit   3,500,000us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_LineOfCreditFacilityAxis
= mpet_WestTexasStateBankMember
   
West Texas State Bank | Prime Rate | Revolving Credit Facility        
Debt Instrument [Line Items]        
Interest rate 3.25%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_LineOfCreditFacilityAxis
= mpet_WestTexasStateBankMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember
     
West Texas State Bank | Floor Rate | Revolving Credit Facility        
Debt Instrument [Line Items]        
Interest rate 3.25%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_LineOfCreditFacilityAxis
= mpet_WestTexasStateBankMember
/ us-gaap_VariableRateAxis
= mpet_FloorRateMember
     
West Texas State Bank | Subsequent Event | Revolving Credit Facility        
Debt Instrument [Line Items]        
Outstanding balance on line of credit     3,500,000us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_LineOfCreditFacilityAxis
= mpet_WestTexasStateBankMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Jonah Bank of Wyoming | Letter of Credit        
Debt Instrument [Line Items]        
Maximum borrowing capacity   25,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LetterOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= mpet_JonahBankofWyomingMember
   
Notes Payable | Note Payable Due June 2014        
Debt Instrument [Line Items]        
Outstanding principal       $ 1,700,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= mpet_NotePayableDueJune2014Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableToBanksMember