ORGANIZATION (Details)	Jun. 30, 2020 item
ORGANIZATION
Number of casinos operated	5
Number of casinos owned	4
Number of casinos located within a hotel owned by a third party	1

Number Of Casinos Located Within Real Estate Owned By Third Party

No definition available.

Name:	fll_NumberOfCasinosLocatedWithinRealEstateOwnedByThirdParty
Namespace Prefix:	fll_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant