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

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=117815213&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=119400593&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=118932676&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=118932676&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											3 Months Ended		12 Months Ended
Debt (Details Narrative) - KRW (₩) ₩ in Thousands	Oct. 02, 2018	Sep. 27, 2018	May 25, 2018	Nov. 02, 2017	Apr. 19, 2017	Apr. 18, 2017	Jul. 18, 2016	Nov. 04, 2015	Oct. 08, 2015	Jun. 02, 2015	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Short-term borrowings												₩ 12,669
Repayments of short term borrowings											35,455	₩ 309,736
Long term debt											627,370		₩ 674,760
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													6.09%	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. 02, 2018
Debt instrument, rate of interest													6.13%	5.05%
Short Term Borrowings Three [Member] \| Extension Agreement [Member] \| May 1, 2019 [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		₩ 900,000
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 01, 2019
Short Term Borrowings Five [Member] \| Suhyup Bank [Member]
Short-term borrowings							₩ 500,000				428,000		₩ 428,000
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 Seven [Member] \| GMT Co., Ltd. [Member]
Short-term borrowings					₩ 550,000						195,000		195,000
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									₩ 59,091		₩ 94,545
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%