ORGANIZATION (Details)	Dec. 31, 2020 item
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 sports skins operating	6
INDIANA
Number of sports skins operating	3
COLORADO
Number of sports skins operating	3

Number Of Casinos Located Within Real Estate Owned By Third Party

No definition available.

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