Debt instrument extended maturity date.

No definition available.

Name:	EMRN_DebtInstrumentExtendedMaturityDate
Namespace Prefix:	EMRN_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1243-112600

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-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_BankOverdrafts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The value of the collateral (typically cash) that the entity receives in a financing transaction in exchange for securities lent. This item represents a liability in the financial statements of the lender of the securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 25
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109249708&loc=d3e113275-111724

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(m)(1)(i)(A)(ii))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_CollateralizedFinancings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromShortTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfShortTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Debt (Details Narrative) - KRW (₩) ₩ in Thousands												9 Months Ended		12 Months Ended
Debt (Details Narrative) - KRW (₩) ₩ in Thousands	Sep. 27, 2018	May 25, 2018	Nov. 03, 2017	Sep. 29, 2017	Aug. 04, 2017	Apr. 19, 2017	Apr. 18, 2017	Jul. 18, 2016	Nov. 04, 2015	Oct. 08, 2015	Jun. 02, 2015	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Short-term borrowings												₩ 168,738	₩ 436,744
Repayments of short term borrowings												471,075
Long term debt												716,400		₩ 930,000
Short Term Borrowings One [Member] \| Refinancing Agreement [Member]
Repayments of short term borrowings				₩ 26,000
Short Term Borrowings One [Member] \| Kookmin Bank [Member]
Short-term borrowings										₩ 260,000		₩ 234,000		₩ 234,000
Debt instrument maturity date										Oct. 02, 2019
Debt instrument, rate of interest												4.70%		4.70%
Short Term Borrowings Two [Member] \| Refinancing Agreement [Member]
Repayments of short term borrowings			₩ 26,000
Short Term Borrowings Two [Member] \| Kookmin Bank [Member]
Short-term borrowings									₩ 260,000			₩ 234,000		₩ 234,000
Debt instrument maturity date									Nov. 01, 2019
Debt instrument, rate of interest												5.05%		5.05%
Short Term Borrowings Three [Member] \| Extension Agreement [Member]
Repayments of short term borrowings		₩ 1,000,000
Short Term Borrowings Three [Member] \| Woori Bank [Member]
Short-term borrowings											₩ 1,000,000	₩ 900,000		₩ 1,000,000
Debt instrument maturity date											Jun. 01, 2019
Debt instrument, rate of interest												4.79%		4.27%
Short Term Borrowings Three [Member] \| Woori Bank [Member] \| Extension Agreement [Member]
Debt instrument extended maturity date		May 25, 2018
Short Term Borrowings Four [Member] \| Woori Bank [Member]
Debt instrument, rate of interest												14.00%		14.00%
Bank overdraft												₩ 61,549		₩ 57,886
Debt collateralized in savings account												5,000
Short Term Borrowings Five [Member] \| Suhyup Bank [Member]
Short-term borrowings								₩ 500,000				₩ 428,000		₩ 464,000
Debt instrument maturity date								Jul. 18, 2018
Debt instrument, rate of interest												2.50%		2.50%
Debt instrument extended maturity date								Jul. 18, 2019
Debt collateralized in savings account												₩ 3,000
Short Term Borrowings Six [Member] \| Hana Bank [Member]
Short-term borrowings					₩ 300,000							₩ 300,000		₩ 300,000
Debt instrument maturity date					Aug. 01, 2018
Debt instrument, rate of interest												2.56%		2.56%
Debt collateralized in savings account												₩ 300,000
Short Term Borrowings Seven [Member] \| GMT Co., Ltd. [Member]
Short-term borrowings						₩ 550,000						200,000		₩ 200,000
Debt instrument maturity date						Nov. 30, 2017
Debt instrument, rate of interest														6.00%
Short Term Borrowings Eight [Member] \| GNC Co., Ltd. [Member]
Short-term borrowings							₩ 300,000					300,000		₩ 300,000
Debt instrument maturity date							Nov. 30, 2017
Debt instrument, rate of interest														6.00%
Short Term Borrowings Nine [Member] \| Kwangju Bank [Member]
Short-term borrowings	₩ 130,000											₩ 130,000
Debt instrument maturity date	Aug. 24, 2019
Debt instrument, rate of interest												5.65%
Short Term Borrowings Nine [Member] \| Kwangju Bank [Member] \| 2019 [Member]
Debt instrument, rate of interest												5.65%