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Note 14 - Capital Stock (Details) - Capital Stock Issued and Outstanding (USD $) In Thousands, except Share data, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Convertible Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Balance, December 31 | 34,481,261 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_ConvertiblePreferredStockMember | 34,476,038 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_ConvertiblePreferredStockMember
Balance, December 31 | $ 310,028 fsrv_CaptialStockIssuedAndOutstandingValue / us-gaap_StatementClassOfStockAxis = us-gaap_ConvertiblePreferredStockMember | $ 300,392 fsrv_CaptialStockIssuedAndOutstandingValue / us-gaap_StatementClassOfStockAxis = us-gaap_ConvertiblePreferredStockMember
Subordinate Voting Shares [Member] |  |
Class of Stock [Line Items] |  |
Balance, December 31 | 1,325,694 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = fsrv_SubordinateVotingSharesMember | 1,325,694 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = fsrv_SubordinateVotingSharesMember
Balance, December 31 | 373 fsrv_CaptialStockIssuedAndOutstandingValue / us-gaap_StatementClassOfStockAxis = fsrv_SubordinateVotingSharesMember | 373 fsrv_CaptialStockIssuedAndOutstandingValue / us-gaap_StatementClassOfStockAxis = fsrv_SubordinateVotingSharesMember
Multiple Voting Shares [Member] |  |
Class of Stock [Line Items] |  |
Balance, December 31 | 35,806,955 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = fsrv_MultipleVotingSharesMember | 35,801,732 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = fsrv_MultipleVotingSharesMember
Balance, December 31 | $ 310,401 fsrv_CaptialStockIssuedAndOutstandingValue / us-gaap_StatementClassOfStockAxis = fsrv_MultipleVotingSharesMember | $ 300,765 fsrv_CaptialStockIssuedAndOutstandingValue / us-gaap_StatementClassOfStockAxis = fsrv_MultipleVotingSharesMember

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- Definition Represents the value of the capital stock issued and outstanding. + References No definition available. + Details
Name: | fsrv_CaptialStockIssuedAndOutstandingValue
Namespace Prefix: | fsrv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
Name: | us-gaap_SharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=fsrv_MultipleVotingSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=fsrv_SubordinateVotingSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |