INVESTMENT IN REAL PROPERTY; OPTION TO LEASE AGREEMENT (Details)	3 Months Ended
Mar. 30, 2019 USD ($)
Investment in real property option to lease agreement [Abstract]
Purchase price of property	$ 1,300,000

The cash outflow from the acquisition of real estate property.

No definition available.

Name:	bdl_PaymentsToAcquireRealPropertyImprovementsAndVacantRealProperty
Namespace Prefix:	bdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration