XML 106 R75.htm IDEA: XBRL DOCUMENT
v3.19.1

LONG-TERM DEBT (Details 1) - 2022 Unsecured Notes [member] | 12 Months Ended
--- | ---
Dec. 31, 2018
2019 |
Long Term Debt [Line Items] |
Redemption price percentage of borrowings | 102.08%
2020 and thereafter |
Long Term Debt [Line Items] |
Redemption price percentage of borrowings | 101.04%
2021 and thereafter |
Long Term Debt [Line Items] |
Redemption price percentage of borrowings | 100.00%

X
- References No definition available. + Details
Name: | ngd_LongTermDebtLineItems
Namespace Prefix: | ngd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage rate of the aggregate principle amount that determines the redemption price of borrowings. + References No definition available. + Details
Name: | ngd_RedemptionPricePercentageOfBorrowings
Namespace Prefix: | ngd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ngd_RedemptionPeriodAxis=ngd_RedemptionPeriodTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=ngd_TwoThousandTwentyTwoUnsecuredNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ngd_RedemptionPeriodAxis=ngd_RedemptionPeriodThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ngd_RedemptionPeriodAxis=ngd_RedemptionperiodfourmemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |