REAL ESTATE INVESTMENTS (Details Narrative)			6 Months Ended
	Dec. 24, 2020 USD ($) ft² a	Dec. 17, 2020 USD ($) ft² a	Mar. 31, 2021 USD ($) ft² $ / shares	Mar. 31, 2020 ft²	Jun. 29, 2017
Real Estate [Line Items]
Transaction costs			$ 576,000
Series C Cumulative Redeemable Preferred Stock [Member]
Real Estate [Line Items]
Cumulative redeemable preferred, stock dividend rate			6.125%		6.125%
Preferred Stock, Par or Stated Value Per Share | $ / shares			$ 0.01
Fed Ex Ground Package System Inc [Member]
Real Estate [Line Items]
Purchase of industrial building | ft²			1,300,000
Project cost			$ 3,400,000
Increase in annual rent			340,000
Fed Ex Ground Package System Inc [Member] | Minimum [Member]
Real Estate [Line Items]
Annual rent			2,200,000
Fed Ex Ground Package System Inc [Member] | Maximum [Member]
Real Estate [Line Items]
Annual rent			$ 2,600,000
Fed Ex Ground Package System Inc [Member] | Industrial Buildings [Member]
Real Estate [Line Items]
Purchase of industrial building | ft²		488,000
Area of property | a		99.0
Percentage of building area leased		100.00%
Lease term		15 years
Lease term expiration period		September 2035
Purchase price of industrial building		$ 73,300,000
Mortgage loan amortization period		15 years
Face amount of mortgages		$ 47,000,000.0
Mortgage loan on real estate, interest rate		2.95%
Annual rental income over the remaining term of lease		$ 4,600,000
Home Depot U.S.A., Inc. [Member] | Industrial Buildings [Member]
Real Estate [Line Items]
Purchase of industrial building | ft²	658,000
Area of property | a	129.9
Percentage of building area leased	100.00%
Lease term	20 years
Lease term expiration period	November 2040
Purchase price of industrial building	$ 96,700,000
Mortgage loan amortization period	17 years
Face amount of mortgages	$ 57,000,000.0
Mortgage loan on real estate, interest rate	3.25%
Annual rental income over the remaining term of lease	$ 5,500,000
Fedex and Fedex Subsidiaries [Member]
Real Estate [Line Items]
Square feet of real estate property leased | ft²			11,200,000	10,400,000
Weighted average lease maturity			7 years 9 months 18 days
Percentage of real estate property leased			46.00%	45.00%
Fedex Corporation [Member]
Real Estate [Line Items]
Percentage of real estate property leased			5.00%	5.00%
Fedex Corporation Subsidiaries [Member]
Real Estate [Line Items]
Percentage of real estate property leased			41.00%	40.00%
Amazon.com Services, Inc. [Member]
Real Estate [Line Items]
Square feet of real estate property leased | ft²			1,500,000
Percentage of real estate property leased			6.00%
Percentage of rental space and tenant account, description			As of March 31, 2021, the only tenants, other than FDX and its subsidiaries, that leased 5% or more of our total square footage were subsidiaries of Amazon.com, Inc (Amazon), which consists of five separate stand-alone leases for properties located in four different states, containing 1.5 million total square feet, comprising 6% of our total leasable square feet.
Fdx And Subsidiaries [Member] | Rental and Reimbursement Revenue [Member]
Real Estate [Line Items]
Percentage of rental space and tenant account, description			The only tenants, other than FDX and its subsidiaries, that we estimate will comprise 5% or more of our total Rental and Reimbursement Revenue for fiscal 2021 are subsidiaries of Amazon, which is estimated to be 7% of our Annualized Rental and Reimbursement Revenue for fiscal 2021 and was 6% for of our Annualized Rental and Reimbursement Revenue for fiscal 2020. For the six months ended March 31, 2021, no other tenant accounted for 5% or more of our total Rental and Reimbursement Revenue.
Percentage of aggregate rental and reimbursement revenue			55.00%	58.00%
Fdx [Member] | Rental and Reimbursement Revenue [Member]
Real Estate [Line Items]
Percentage of aggregate rental and reimbursement revenue			5.00%	5.00%
Fdx Subsidiaries [Member] | Rental and Reimbursement Revenue [Member]
Real Estate [Line Items]
Percentage of aggregate rental and reimbursement revenue			50.00%	53.00%