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Discontinued operations - Schedule of Gain (Loss) on Disposal Activity Phantom (Detail) $ in Thousands | 9 Months Ended
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Sep. 30, 2018 USD ($)
Discontinued Operations and Disposal Groups [Abstract] |
Write-off of unamortized debt costs | $ 284

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- Definition Write-off of unamortized debt costs. + References No definition available. + Details
Name: | flnt_WriteOffOfUnamortizedDebtCosts
Namespace Prefix: | flnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration