XML 104 R76.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Short Term Investments (Schedule of Short Term Investments) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Short Term Investments [abstract] |  |
Term deposits and similar instruments | $ 29,500 | $ 41,100

X
- Definition Disclosure of short term investments [abstract]. + References No definition available. + Details
Name: | fsm_DisclosureOfShortTermInvestmentsAbstract
Namespace Prefix: | fsm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of current investments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_CurrentInvestments
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant