XML 62 R40.htm IDEA: XBRL DOCUMENT v3.10.0.1

Investments - Additional Information (Detail) - EUR (€) € in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Investment [Line Items]
Purchases of investments		€ 29,560
Proceeds from investment maturities		18,931
Foreign currency exchange gains	€ 6,917	4,111
Finance Income Expense [Member]
Investment [Line Items]
Foreign currency exchange gains	€ 3,100	€ 1,900

X

- Definition

The net gain arising from foreign exchange differences. [Refer: Foreign exchange gain (loss)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 21
-IssueDate 2018-01-01
-Paragraph 52
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2018-03-01&anchor=para_52_a&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_NetForeignExchangeGain
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The cash inflow from sales or maturity of financial instruments, classified as investing activities. [Refer: Financial instruments, class [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_16&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The cash outflow for the purchase of financial instruments. [Refer: Financial instruments, class [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_16&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	invest_InvestmentLineItems
Namespace Prefix:	invest_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	mrus_IncomeStatementLineItemLocationAxis=mrus_NetFinanceIncomeExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: