REAL ESTATE INVESTMENTS (Details Narrative) shares in Millions								1 Months Ended	9 Months Ended		12 Months Ended
	Jul. 26, 2019 USD ($) a ft²	Nov. 30, 2018 USD ($) a ft²	Oct. 19, 2018 USD ($) a ft²	Jun. 05, 2018 USD ($) ft²	Jun. 01, 2018 USD ($) ft²	Dec. 22, 2017 USD ($) ft²	Dec. 18, 2017 USD ($) ft²	Oct. 31, 2018 shares	Jun. 30, 2019 USD ($) ft²	Jun. 30, 2018 USD ($) ft²	Sep. 30, 2018 USD ($)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Transaction costs									$ 324,000
Gain on sale of property											$ 7,500,000
Percentage of gain on sale of property											51.00%
Gain on historic undepreciated cost basis											$ 1,200,000
Percentage of gain on historic undepreciated cost basis											6.00%
Common stock issued during period, shares | shares								9.2
Weighted average lease maturity									7 years 9 months 18 days
Held marketable securities									$ 171,000,000.0
Marketable securities as a percentage of undepreciated assets									8.20%
Series C Cumulative Redeemable Preferred Stock [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Cumulative redeemable preferred, stock dividend rate									6.125%
Monroe O H [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Lease term									15 years
Mortgage loan on real estate, interest rate									3.77%
Square feet of expansion to industrial building | ft²									155,000
Cost of building expansion									$ 8,600,000
Extended prior lease expiration date									February 2030 to February 2034
Increase in annual rent									$ 821,000
Rent prior to expansion									$ 980,000
Rent prior to expansion, per square foot | ft²									4.22
Rent increase to after expansion									$ 1,800,000
Rent increase to after expansion, per square foot | ft²									4.65
Increase in annual rent per year									2.00%
Average annualized rent over the term of lease									$ 2,100,000
Face amount of original mortgage									$ 6,800,000
Monroe O H [Member] | Second Mortgage Loan [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Mortgage loan amortization period									10 years 8 months 12 days
Mortgage loan on real estate, interest rate									3.85%
Face amount of new mortgage									$ 7,000,000.0
Kansas City M O [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Square feet of industrial building sold | ft²							65,000
Gross proceeds from sale of property							$ 4,900,000
Net sale proceeds							$ 4,600,000
Orangeburg N Y [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Square feet of industrial building sold | ft²						50,000
Gross proceeds from sale of property						$ 6,200,000
Net sale proceeds						$ 5,900,000
Kansas City M O And Orangeburg [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Lease termination income										$ 210,000
Weighted average of remaining rent due under each lease										80.00%
Colorado Springs C O [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Purchase of industrial building | ft²					225,000
Gross proceeds from sale of property					$ 5,800,000
Square feet of industrial building sold | ft²					68,370
Net proceeds from sale of property					$ 5,500,000
Ft Myers F L [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Purchase of industrial building | ft²				214,000
Gross proceeds from sale of property				$ 6,400,000
Square feet of industrial building sold | ft²				87,500
Net proceeds from sale of property				$ 6,100,000
Fedex And Fedex Subsidiaries [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Square feet of real estate property leased | ft²									10,500,000	9,400,000
Weighted average lease maturity									8 years 9 months 18 days
Percentage of real estate property leased									48.00%	46.00%
Percentage of rental space and tenant account, description									no other tenant accounted for 5% or more of our total rental space
Fedex And Fedex Subsidiaries [Member] | Rental And Reimbursement Revenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Percentage of rental space and tenant account, description									No other tenant accounted for 5% or more of our total Rental	No other tenant accounted for 5% or more of our total Rental
Percentage of aggregate rental and reimbursement revenue									60.00%	56.00%
Fedex Corporation [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Percentage of real estate property leased									5.00%	7.00%
Fedex Corporation [Member] | Rental And Reimbursement Revenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Percentage of aggregate rental and reimbursement revenue									5.00%	7.00%
Fedex Corporation Subsidiaries [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Percentage of real estate property leased									43.00%	39.00%
Fedex Corporation Subsidiaries [Member] | Rental And Reimbursement Revenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Percentage of aggregate rental and reimbursement revenue									55.00%	49.00%
Industrial Buildings [Member] | Fedex Ground Package System Inc [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Purchase of industrial building | ft²		127,000	347,000
Area of property | a		29.4	62.0
Percentage of building area leased		100.00%	100.00%
Lease term		10 years	15 years
Lease term expiration period		October 2028	June 2032
Purchase price of industrial building		$ 27,800,000	$ 85,200,000
Mortgage loan amortization period		15 years	15 years
Face amount of mortgages		$ 17,500,000	$ 55,000,000.0
Mortgage loan on real estate, interest rate		4.40%	4.13%
Annual rental income over the remaining term of lease		$ 1,800,000	$ 5,300,000
Industrial Buildings [Member] | Toyota Tsusho America Inc [Member] | Subsequent Event [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Purchase of industrial building | ft²	350,000
Area of property | a	45.6
Percentage of building area leased	100.00%
Lease term	10 years
Lease term expiration period	June 2029
Purchase price of industrial building	$ 25,500,000
Mortgage loan amortization period	15 years
Face amount of mortgages	$ 17,000,000.0
Mortgage loan on real estate, interest rate	4.25%
Annual rental income over the remaining term of lease	$ 1,700,000