Organization (Narrative) (Details)			1 Months Ended				5 Months Ended	12 Months Ended
	Sep. 22, 2020 USD ($)	Sep. 20, 2020 USD ($)	Jul. 31, 2021 shares	Jun. 30, 2021 $ / shares	May 31, 2021 $ / shares	Mar. 31, 2020 USD ($)	Sep. 30, 2020 item	Dec. 31, 2021 USD ($) store item $ / shares shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($)	Dec. 31, 2017 store	Jan. 31, 2022 USD ($)	Nov. 19, 2021 USD ($)	Sep. 30, 2021 USD ($)	Oct. 31, 2020 USD ($)
Business Acquisition [Line Items]
Number of publicly-traded companies after spin-off | item								2
Purchase and retirement, value								$ 22,835,000
Revenues								313,597,000	$ 173,229,000	$ 203,724,000
Revenue from customers								303,557,000	167,573,000	185,368,000
Repayments Of Long Term Debt								22,096,000	16,459,000	3,947,000
Share repurchase program, value															$ 10,000,000.0
Loss from noncontrolling interest									1,248,000	1,902,000
Cash and cash equivalents								118,045,000	90,037,000	20,723,000
Real estate investment impairment								0		0
Impairment losses									22,384,000
Right-of-use asset impairment									0
Altman [Member]
Business Acquisition [Line Items]
Consolidated method ownership percentage								50.00%
MOD Pizza [Member]
Business Acquisition [Line Items]
Number of stores open | store											60
Number of stores transferred | store								7
Number of stores closed | store								2
Disposal group, impairment loss								$ 6,700,000	4,000,000.0	2,700,000
Number of stores performing below expectations | store								3
BBXRE [Member] | Notes Payable [Member]
Business Acquisition [Line Items]
Debt face amount		$ 75,000,000.0
Interest rate		6.00%
Cumulative compounded rate of interest		8.00%
Debt Instrument, Maturity Date		Sep. 30, 2025
Repayments Of Long Term Debt								$ 25,000,000.0
Notes Payable								50,000,000.0
IT'SUGAR, LLC [Member]
Business Acquisition [Line Items]
Number of stores open for existing owners | item							100
Loss from noncontrolling interest	$ 3,300,000
Cash and cash equivalents	$ 1,045,000
Renin [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Business Acquisition [Line Items]
Revenue from customers								$ 50,300,000	$ 34,200,000	$ 20,200,000
Risk percentage								16.00%	19.70%	10.00%
Renin [Member] | Revenue Benchmark [Member] | Customer Two Concentration Risk [Member]
Business Acquisition [Line Items]
Revenue from customers								$ 42,800,000	$ 29,400,000
Risk percentage								13.60%	17.00%
Renin [Member] | Revenue Benchmark [Member] | Customer Three Concentration Risk [Member]
Business Acquisition [Line Items]
Revenue from customers								$ 30,400,000
Risk percentage								9.70%
Class A Common Stock [Member]
Business Acquisition [Line Items]
Share repurchased, price per share | $ / shares					$ 6.75
Number of shares repurchased | shares			1,402,785
Common stock, shares authorized | shares								30,000,000	30,000,000
Class A Common Stock [Member] | Maximum [Member]
Business Acquisition [Line Items]
Share repurchased, price per share | $ / shares				$ 8.00
Class B Common Stock [Member]
Business Acquisition [Line Items]
Common stock, shares authorized | shares								4,000,000
Renin [Member] | Reportable Segments [Member]
Business Acquisition [Line Items]
Revenues								$ 146,255,000	$ 93,036,000	$ 67,537,000
Number of major customers | item								3
Cash and cash equivalents								$ 1,369,000	2,438,000
Renin [Member] | Customer Concentration Risk [Member] | Reportable Segments [Member]
Business Acquisition [Line Items]
Revenue from customers								123,500,000
Renin [Member] | Outside United States [Member] | Reportable Segments [Member]
Business Acquisition [Line Items]
Revenue from customers								50,600,000
IT'SUGAR, LLC [Member]
Business Acquisition [Line Items]
Impairment losses						$ 20,300,000
IT'SUGAR, LLC [Member] | Reportable Segments [Member]
Business Acquisition [Line Items]
Revenues								84,251,000
Cash and cash equivalents								$ 9,792,000
IT'SUGAR, LLC [Member] | BBX Sweet Holdings [Member]
Business Acquisition [Line Items]
Consolidated method ownership percentage								90.00%
DIP Facility [Member] | IT'SUGAR, LLC [Member]
Business Acquisition [Line Items]
Debt face amount								$ 11,000,000.0
Interest rate								5.00%
Maximum borrowing capacity								$ 4,000,000.0
Repurchase Plan [Member]
Business Acquisition [Line Items]
Share repurchased, price per share | $ / shares								$ 9.36
Repurchase Plan [Member] | Class A Common Stock [Member]
Business Acquisition [Line Items]
Share repurchase program, value													$ 14,500,000
Number of shares repurchased | shares								2,425,229
Repurchase Plan [Member] | Class A Common Stock [Member] | Minimum [Member]
Business Acquisition [Line Items]
Share repurchase program, value														$ 10,000,000
Repurchase Plan [Member] | Class A Common Stock [Member] | Maximum [Member]
Business Acquisition [Line Items]
Share repurchase program, value														$ 20,000,000
Repurchase Plan [Member] | Class B Common Stock [Member]
Business Acquisition [Line Items]
Number of shares repurchased | shares								14,394
Repurchase Plan [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Share repurchase program, value												$ 15,000,000.0
Trade Sales [Member]
Business Acquisition [Line Items]
Revenue from customers								$ 238,078,000	147,210,000	180,319,000
Trade Sales [Member] | Renin [Member] | Reportable Segments [Member]
Business Acquisition [Line Items]
Revenue from customers								146,255,000	93,036,000	67,537,000
Trade Sales [Member] | IT'SUGAR, LLC [Member] | Reportable Segments [Member]
Business Acquisition [Line Items]
Revenue from customers								84,215,000
Sales Of Real Estate Inventory [Member]
Business Acquisition [Line Items]
Revenue from customers								$ 65,479,000	$ 20,363,000	$ 5,049,000