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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable (Details) $ in Millions | May 31, 2022 USD ($)
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Free play |
Basis Of Presentation [Line Items] |
Receivable from sale of free play | $ 2.1

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | fll_BasisOfPresentationLineItems
Namespace Prefix: | fll_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of receivable from sale of free play. + References No definition available. + Details
Name: | fll_ReceivableFromSaleOfFreePlay
Namespace Prefix: | fll_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | srt_ProductOrServiceAxis=fll_FreePlayMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |