XML 109 R102.htm IDEA: XBRL DOCUMENT
v3.8.0.1

SHARE CAPITAL (Details Textual) $ / shares in Units, shares in Thousands, $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2017 USD ($) | Mar. 10, 2017 $ / shares shares | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CAD ($) Numberofunits shares | Dec. 31, 2016 USD ($) | Dec. 31, 2016 CAD ($) Numberofunits shares | Dec. 31, 2015 shares
Share capital [Line Items] |  |  |  |  |  |  |  |
Number of shares outstanding | shares |  |  |  |  | 578,636 |  | 513,709 | 509,469
Stock Option Plan, Maximum Authorized Shares Percentage |  |  |  |  | 3.50% |  |  |
Weighted average fair value at measurement date, share options granted |  |  |  |  | $ 1.69 |  | $ 1.67 |
Number of share options exercisable in share-based payment arrangement | Numberofunits |  |  |  |  | 8,665,500 |  |  |
Weighted average exercise price of share options exercisable in share-based payment arrangement |  |  |  |  | $ 5.65 |  |  |
Weighted average exercise price of share options exercised in share-based payment arrangement |  |  |  |  | $ 3.31 |  | $ 3.49 |
Description of vesting requirements for share-based payment arrangement |  |  |  |  |  | The options vest one third per year over a three-year period beginning on the first anniversary of the grant date. | The options vest one third per year over a three-year period beginning on the first anniversary of the grant date. |
Weighted average remaining contractual life of outstanding share options |  |  |  |  | 2.4 |  |  |
Weighted average share price |  |  |  |  | $ 4.22 |  | $ 5.26 |
Number Of Common Shares Issued On Equity Offering | shares | [1] |  | 61,700 |  |  |  |  |
Share Price | $ / shares |  |  | $ 2.80 |  |  |  |  |
Gross Proceeds From Issuance Of Ordinary Shares |  | $ 172.9 |  |  |  |  |  |
Share issue related cost |  | 8.2 |  |  |  |  |  |
Deferred tax expense (income) |  | $ 1.9 |  | $ (131.0) |  | $ (10.8) |  |
Expense from share-based payment transactions with employees |  |  |  | $ 5.1 |  | 8.3 |  |
Stock Options [Member] |  |  |  |  |  |  |  |
Share capital [Line Items] |  |  |  |  |  |  |  |
Number of share options exercisable in share-based payment arrangement | Numberofunits |  |  |  |  | 8,700,000 |  | 8,700,000 |
Weighted average exercise price of share options exercisable in share-based payment arrangement |  |  |  |  | $ 5.65 |  | $ 6.99 |
Weighted average exercise price of share options exercised in share-based payment arrangement |  |  |  |  | $ 4.16 |  | $ 5.47 |
Bottom of range [member] |  |  |  |  |  |  |  |
Share capital [Line Items] |  |  |  |  |  |  |  |
Achieved Performance Percentage |  |  |  | 50.00% | 50.00% |  |  |
Top of range [member] |  |  |  |  |  |  |  |
Share capital [Line Items] |  |  |  |  |  |  |  |
Achieved Performance Percentage |  |  |  | 150.00% | 150.00% |  |  |
Restricted Share Unit [Member] |  |  |  |  |  |  |  |
Share capital [Line Items] |  |  |  |  |  |  |  |
Adjustments for share-based payments |  |  |  | $ 2.2 |  | 1.1 |  |
Weighted average remaining contractual life of outstanding share options |  |  |  |  | 1.7 |  | 1.7 |
Expense from share-based payment transactions with employees | [2],[3] |  |  | 1.2 |  | 2.7 |  |
Common Shares Under First Nations Agreement [Member] |  |  |  |  |  |  |  |
Share capital [Line Items] |  |  |  |  |  |  |  |
Expense from share-based payment transactions with employees | [4] |  |  | $ 2.1 |  | $ 0.0 |  |
Ordinary shares [member] |  |  |  |  |  |  |  |
Share capital [Line Items] |  |  |  |  |  |  |  |
Number of shares outstanding | shares |  |  |  |  | 578,600 |  |  |
[1] | Stock options
[2] | For the year ended December 31, 2017, $1.1 million (2016 - $2.2 million) of restricted share unit expense and $2.1 million (2016 – nil) of common shares issued under First Nations agreements expense was recognized in operating expenses.
[3] | Restricted share units
[4] | For the years ended December 31, 2017 and 2016, common shares issued under First Nations agreements prior to the commencement of commercial production at Rainy River have been capitalized to mining interests.

X
- Definition Adjustments for share-based payments to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 20 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_20_b&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_AdjustmentsForSharebasedPayments
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of tax expense (income) relating to changes in deferred tax liabilities and deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_ii&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DeferredTaxExpenseIncome
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The description of the vesting requirements for a type of share-based payment arrangement that existed at any time during the period. An entity with substantially similar types of share-based payment arrangements may aggregate this information. [Refer: Share-based payment arrangements [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_a&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfVestingRequirementsForSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expense from share-based payment transactions with employees. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of share options exercisable in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -Subparagraph b -Clause vii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_b_vii&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 79 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_79_a_iv&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_NumberOfSharesOutstanding
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of cost related to the issuance of shares. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_106_d&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ShareIssueRelatedCost
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The weighted average exercise price of share options exercisable in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -Subparagraph b -Clause vii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_b_vii&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average exercise price of share options exercised in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -Subparagraph b -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_b_iv&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value of share options granted during the period at the measurement date. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 47 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_d&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average share price. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_c&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_WeightedAverageSharePrice
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The achieve performance percentage that is multiplied by the number of PSUs granted to determine number of shares issued and cash to be paid. + References No definition available. + Details
Name: | ngd_AchievedPerformancePercentage
Namespace Prefix: | ngd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The gross proceeds from issuance of ordinary shares before deducting equity issuance cost and deferred tax recovery. + References No definition available. + Details
Name: | ngd_GrossProceedsFromIssuanceOfOrdinaryShares
Namespace Prefix: | ngd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of common shares issued on equity offering. + References No definition available. + Details
Name: | ngd_NumberOfCommonSharesIssuedOnEquityOffering
Namespace Prefix: | ngd_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The price of the common stock in open market + References No definition available. + Details
Name: | ngd_SharePrice1
Namespace Prefix: | ngd_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum percentage of shares authorized to be issued under the plan. + References No definition available. + Details
Name: | ngd_StockOptionPlanMaximumAuthorizedSharesPercentage
Namespace Prefix: | ngd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ngd_AntidilutiveSecurityItemsAxis=ngd_StockOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ngd_RestrictedShareUnitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ngd_CommonSharesUnderFirstNationsAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |