Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Total revenues	$ 6,663,000	$ 18,740,000	$ 13,572,000	$ 37,886,000
Costs and operating expenses:
Depreciation and amortization expenses	(1,181,000)	(1,232,000)	(2,372,000)	(2,445,000)
General and administrative expenses	(560,000)	(581,000)	(1,926,000)	(1,341,000)
Total costs and operating expenses	(8,974,000)	(15,632,000)	(18,452,000)	(30,903,000)
Loss (income) from operations	(2,311,000)	3,108,000	(4,880,000)	6,983,000
Other income (expense):
Interest expense - mortgages	(2,241,000)	(2,330,000)	(4,556,000)	(4,727,000)
Gain from sale of real estate			12,043,000
Net gain (loss) on marketable securities	3,501,000	(53,000)	3,248,000	(198,000)
Net gain (loss) on marketable securities - Comstock	(44,000)	(66,000)	51,000	(370,000)
Impairment loss on other investments	(27,000)		(89,000)
Dividend and interest income	81,000	111,000	205,000	241,000
Trading and margin interest expense	(287,000)	(241,000)	(556,000)	(534,000)
Total other income (expense), net	983,000	(2,579,000)	10,346,000	(5,588,000)
(Loss) income before income taxes	(1,328,000)	529,000	5,466,000	1,395,000
Income tax benefit (expense)	265,000	(149,000)	(1,710,000)	(371,000)
Net (loss) income	(1,063,000)	380,000	3,756,000	1,024,000
Less: Net loss (income) attributable to the noncontrolling interest	998,000	(132,000)	729,000	(440,000)
Net (loss) income attributable to InterGroup Corporation	$ (65,000)	$ 248,000	$ 4,485,000	$ 584,000
Basic	$ (0.47)	$ 0.17	$ 1.64	$ 0.44
Diluted		0.14	1.43	0.39
Net income per share attributable to InterGroup Corporation
Basic	(0.03)	0.11	1.96	0.25
Diluted		$ 0.09	$ 1.71	$ 0.22
Weighted average number of basic common shares outstanding	2,283,229	2,302,748	2,283,657	2,306,070
Weighted average number of diluted common shares outstanding	2,617,224	2,633,143	2,617,652	2,636,465
Hotel [Member]
Revenues:
Total revenues	$ 3,109,000	$ 14,901,000	$ 6,534,000	$ 30,330,000
Costs and operating expenses:
Total costs and operating expenses	(5,133,000)	(11,730,000)	(10,166,000)	(23,078,000)
Real Estate [Member]
Revenues:
Total revenues	3,554,000	3,839,000	7,038,000	7,556,000
Costs and operating expenses:
Total costs and operating expenses	$ (2,100,000)	$ (2,089,000)	$ (3,988,000)	$ (4,039,000)