XML 157 R114.htm IDEA: XBRL DOCUMENT v3.20.1

Income Taxes (Schedule of Unrecognized Deductible Temporary Difference and Unused Tax Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [line items]
Non capital losses	$ 72,156	$ 81,188
Provision	5,074	5,173
Share issue costs	2,174	3,354
Mineral properties, plant and equipment		244
Lease obligation	656
Derivative liabilities	894
Capital losses	2,496	2,326
Investment in associates	1,397
Unrecognized deductible temporary differences	84,847	92,285
MEXICO
Income Taxes [line items]
Non capital losses	369	349
Investment in associates	198,214	97,705
PERU
Income Taxes [line items]
Non capital losses	70	238
Investment in associates	$ 54,618	$ 69,669

X

- Definition

Income Taxes [line items].

+ References

No definition available.

+ Details

Name:	fsm_IncomeTaxesLineItems
Namespace Prefix:	fsm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Unrecognized tax benefits capital loss carryforwards..

+ References

No definition available.

+ Details

Name:	fsm_UnrecognizedTaxBenefitsCapitalLossCarryforwards
Namespace Prefix:	fsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Unrecognized tax benefits related to derivatives.

+ References

No definition available.

+ Details

Name:	fsm_UnrecognizedTaxBenefitsRelatedToDerivatives
Namespace Prefix:	fsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Unrecognized tax benefits related to mineral property, plant and equipment.

+ References

No definition available.

+ Details

Name:	fsm_UnrecognizedTaxBenefitsRelatedToMineralPropertyPlantAndEquipment
Namespace Prefix:	fsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Unrecognized tax losses deductible temporary differences and tax credits.

+ References

No definition available.

+ Details

Name:	fsm_UnrecognizedTaxLossesDeductibleTemporaryDifferencesAndTaxCredits
Namespace Prefix:	fsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Unused tax credits related to lease obligations.

+ References

No definition available.

+ Details

Name:	fsm_UnusedTaxCreditsRelatedToLeaseObligations
Namespace Prefix:	fsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Unused tax losses related to provision and other.

+ References

No definition available.

+ Details

Name:	fsm_UnusedTaxLossesRelatedToProvisionAndOther
Namespace Prefix:	fsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The aggregate amount of temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements, for which deferred tax liabilities have not been recognised as a result of satisfying both of the following conditions: (a) the parent, investor, joint venturer or joint operator is able to control the timing of the reversal of the temporary difference; and (b) it is probable that the temporary difference will not reverse in the foreseeable future. [Refer: Associates [member]; Subsidiaries [member]; Temporary differences [member]; Investments in subsidiaries]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2018-01-01
-Paragraph 81
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_f&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount of unused tax credits for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax credits [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2018-01-01
-Paragraph 81
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_e&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2018-01-01
-Paragraph 81
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_e&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_MX
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_PE
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: