CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Total revenues	$ 19,489,000	$ 18,114,000
Costs and operating expenses:
Hotel operating expenses	(10,810,000)	(10,589,000)
Real estate operating expenses	(2,012,000)	(1,895,000)
Depreciation and amortization expenses	(1,243,000)	(1,274,000)
General and administrative expenses	(643,000)	(831,000)
Total costs and operating expenses	(14,708,000)	(14,589,000)
Income from operations	4,781,000	3,525,000
Other income (expense):
Interest expense - mortgages	(2,565,000)	(2,493,000)
Net loss on marketable securities	(171,000)	(1,022,000)
Dividend and interest income	97,000	83,000
Trading and margin interest expense	(304,000)	(313,000)
Total other expense, net	(2,943,000)	(3,745,000)
Income (loss) before income taxes	1,838,000	(220,000)
Income tax expense	(710,000)	(75,000)
Net income (loss)	1,128,000	(295,000)
Less: Net income attributable to the noncontrolling interest	(498,000)	(117,000)
Net income (loss) attributable to InterGroup	$ 630,000	$ (412,000)
Net income (loss) per share
Basic	$ 0.48	$ (0.12)
Diluted	0.43	(0.12)
Net income (loss) per share attributable to InterGroup
Basic	0.27	(0.17)
Diluted	$ 0.24	$ (0.17)
Weighted average number of basic common shares outstanding	2,333,419	2,371,765
Weighted average number of diluted common shares outstanding	2,651,419	2,371,765
Hotel [Member]
Revenues:
Total revenues	$ 15,810,000	$ 14,436,000
Real Estate [Member]
Revenues:
Total revenues	$ 3,679,000	$ 3,678,000