Loans Receivable - Summary of Age Analysis of Past Due Receivables (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Past due receivables	$ 356,476	$ 570,334
Past due receivables Current	3,611,741	5,590,547
Total Financing Receivables	3,968,217	6,160,881
Recorded Investment > 90 Days and not Accruing	184,288	327,705
31-60 Days Past Due [Member]
Past due receivables	91,953	157,988
61-90 Days Past Due [Member]
Past due receivables	80,235	84,640
Greater Than 90 Days [Member]
Past due receivables	$ 184,288	$ 327,705

Financing receivables.

No definition available.

Name:	MRAL_FinancingReceivablesNet
Namespace Prefix:	MRAL_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Financing receivables that are current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=MRAL_FinancingReceivablesThirtyOneToSixtyDaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=MRAL_FinancingReceivablesSixteyOneToNinetyDaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=MRAL_FinancingReceivablesEqualToGreaterThanNintyOneDaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: