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

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.

No definition available.

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Namespace Prefix:	fll_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration