XML 102 R75.htm IDEA: XBRL DOCUMENT v3.21.1

Significant Accounting Policies (Schedule related to property, plant and equipment) (Details)	12 Months Ended
	Dec. 31, 2020
Land [member]
Disclosure of detailed information about property, plant and equipment [line items]
Measurement bases, property, plant and equipment	Not depreciated
Buildings [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation method, property, plant and equipment	Straight line
Buildings [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful life measured as period of time, property, plant and equipment	6 years
Buildings [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful life measured as period of time, property, plant and equipment	10 years
Mineral Properties [member]
Disclosure of detailed information about property, plant and equipment [line items]
Measurement bases, property, plant and equipment	Units of production
Depreciation method, property, plant and equipment	Declining balance
Buildings Located At Mine [member]
Disclosure of detailed information about property, plant and equipment [line items]
Measurement bases, property, plant and equipment	Units of production
Depreciation method, property, plant and equipment	Declining balance
Leasehold improvements [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation method, property, plant and equipment	Straight line
Leasehold improvements [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful life measured as period of time, property, plant and equipment	4 years
Leasehold improvements [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful life measured as period of time, property, plant and equipment	8 years
Machinery and Equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation method, property, plant and equipment	Straight line
Machinery and Equipment [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful life measured as period of time, property, plant and equipment	3 years
Machinery and Equipment [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful life measured as period of time, property, plant and equipment	12 years
Furniture and other equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation method, property, plant and equipment	Straight line
Furniture and other equipment [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful life measured as period of time, property, plant and equipment	2 years
Furniture and other equipment [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful life measured as period of time, property, plant and equipment	12 years
Transport units [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation method, property, plant and equipment	Straight line
Transport units [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful life measured as period of time, property, plant and equipment	4 years
Transport units [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful life measured as period of time, property, plant and equipment	5 years
Capital Work in Progress [member]
Disclosure of detailed information about property, plant and equipment [line items]
Measurement bases, property, plant and equipment	Not depreciated

X

- Definition

The depreciation method used for property, plant and equipment. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2020-01-01
-Paragraph 73
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_b&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The measurement bases used for determining the gross carrying amount for a class of property, plant and equipment. [Refer: Gross carrying amount [member]; Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2020-01-01
-Paragraph 73
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_a&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The useful life, measured as period of time, used for property, plant and equipment. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2020-01-01
-Paragraph 73
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_c&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_BuildingsMember
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_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_MiningPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=fsm_BuildingsLocatedAtMineMember
Namespace Prefix:
Data Type:	na
Balance Type:
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X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_LeaseholdImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_MachineryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=fsm_FurnitureAndOtherEquipmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_VehiclesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_ConstructionInProgressMember
Namespace Prefix:
Data Type:	na
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