CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
REVENUE
Rental income	$ 1,909,000	$ 4,457,000
Management and other fee income	$ 141,000	$ 142,000
Type of Revenue [Extensible List]	Management and Other Fee Income [Member]	Management and Other Fee Income [Member]
Total revenue	$ 2,050,000	$ 4,599,000
EXPENSES
Property operating	1,461,000	2,908,000
Real estate taxes	333,000	953,000
Depreciation and amortization	400,000	2,075,000
General and administrative	5,292,000	15,693,000
Total expenses	7,486,000	21,629,000
Gain on sale of real estate, net	0	6,936,000
Impairment of real estate assets	(15,183,000)	0
Equity in loss of unconsolidated entities	(7,167,000)	(7,928,000)
Interest and other income (expense), net	371,000	860,000
Interest expense	(2,903,000)	(5,230,000)
Loss before income taxes	(30,318,000)	(22,392,000)
Benefit from income taxes	0	190,000
Net loss	(30,318,000)	(22,202,000)
Preferred dividends	(1,225,000)	(1,225,000)
Net loss attributable to Seritage common shareholders	$ (31,543,000)	$ (23,427,000)
Net loss per share attributable to Seritage Class A common shareholders - Basic	$ (0.56)	$ (0.42)
Net loss per share attributable to Seritage Class A common shareholders - Diluted	$ (0.56)	$ (0.42)
Weighted average Class A common shares outstanding - Basic	56,324	56,283
Weighted average Class A common shares outstanding - Diluted	56,324	56,283