SUMMARY OF MORTGAGE NOTES PAYABLE (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Debt Instrument [Line Items]
Mortgage Notes Payable		$ 832,184	$ 799,507
Mortgage Notes Payable [Member]
Debt Instrument [Line Items]
Mortgage Notes Payable		$ 839,622	807,371
Mortgage Notes Payable [Member] | Topeka, KS [Member]
Debt Instrument [Line Items]
Fixed Rate	[1]	6.50%
Maturity date	[1]	Aug. 10, 2021
Mortgage Notes Payable	[1]	$ 0	288
Mortgage Notes Payable [Member] | Streetsboro, OH (Cleveland) [Member]
Debt Instrument [Line Items]
Fixed Rate	[2]	5.50%
Maturity date	[2]	Nov. 01, 2021
Mortgage Notes Payable	[2]	$ 7,332	8,025
Mortgage Notes Payable [Member] | Kansas City, MO [Member]
Debt Instrument [Line Items]
Fixed Rate	[1]	5.18%
Maturity date	[1]	Dec. 01, 2021
Mortgage Notes Payable	[1]	$ 0	6,273
Mortgage Notes Payable [Member] | Olive Branch, MS (Memphis, TN)(Anda Pharmaceuticals, Inc.) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.80%
Maturity date		Apr. 01, 2022
Mortgage Notes Payable		$ 5,558	6,259
Mortgage Notes Payable [Member] | Waco, TX [Member]
Debt Instrument [Line Items]
Fixed Rate		4.75%
Maturity date		Aug. 01, 2022
Mortgage Notes Payable		$ 3,280	3,613
Mortgage Notes Payable [Member] | Houston, TX [Member]
Debt Instrument [Line Items]
Fixed Rate	[1]	6.88%
Maturity date	[1]	Sep. 10, 2022
Mortgage Notes Payable	[1]	$ 0	1,102
Mortgage Notes Payable [Member] | Tolleson, AZ (Phoenix) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.95%
Maturity date		Nov. 01, 2022
Mortgage Notes Payable		$ 1,103	2,010
Mortgage Notes Payable [Member] | Edwardsville, KS (Kansas City)(International Paper) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.45%
Maturity date		Nov. 01, 2023
Mortgage Notes Payable		$ 6,804	7,627
Mortgage Notes Payable [Member] | Spring, TX (Houston) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.01%
Maturity date		Dec. 01, 2023
Mortgage Notes Payable		$ 5,931	6,623
Mortgage Notes Payable [Member] | Memphis, TN [Member]
Debt Instrument [Line Items]
Fixed Rate		4.50%
Maturity date		Jan. 01, 2024
Mortgage Notes Payable		$ 2,364	3,304
Mortgage Notes Payable [Member] | Oklahoma City, OK (FDX Ground) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.35%
Maturity date		Jul. 01, 2024
Mortgage Notes Payable		$ 1,767	2,341
Mortgage Notes Payable [Member] | Indianapolis, IN [Member]
Debt Instrument [Line Items]
Fixed Rate		4.00%
Maturity date		Sep. 01, 2024
Mortgage Notes Payable		$ 7,366	8,431
Mortgage Notes Payable [Member] | Frankfort, KY (Lexington) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.84%
Maturity date		Dec. 15, 2024
Mortgage Notes Payable		$ 13,483	14,611
Mortgage Notes Payable [Member] | Carrollton, TX (Dallas) [Member]
Debt Instrument [Line Items]
Fixed Rate		6.75%
Maturity date		Feb. 01, 2025
Mortgage Notes Payable		$ 3,781	4,733
Mortgage Notes Payable [Member] | Altoona, PA [Member]
Debt Instrument [Line Items]
Fixed Rate	[3]	4.00%
Maturity date	[3]	Oct. 01, 2025
Mortgage Notes Payable	[3]	$ 1,987	2,426
Mortgage Notes Payable [Member] | Green Bay, WI [Member]
Debt Instrument [Line Items]
Fixed Rate	[3]	4.00%
Maturity date	[3]	Oct. 01, 2025
Mortgage Notes Payable	[3]	$ 1,613	1,971
Mortgage Notes Payable [Member] | Stewartville, MN (Rochester) [Member]
Debt Instrument [Line Items]
Fixed Rate	[3]	4.00%
Maturity date	[3]	Oct. 01, 2025
Mortgage Notes Payable	[3]	$ 1,292	1,578
Mortgage Notes Payable [Member] | Carlstadt, NJ (New York, NY) [Member]
Debt Instrument [Line Items]
Fixed Rate	[4]	5.25%
Maturity date	[4]	May 15, 2026
Mortgage Notes Payable	[4]	$ 0	1,227
Mortgage Notes Payable [Member] | Roanoke, VA (FDX Ground) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.84%
Maturity date		Jul. 01, 2026
Mortgage Notes Payable		$ 2,866	3,395
Mortgage Notes Payable [Member] | Livonia, MI (Detroit) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.45%
Maturity date		Dec. 01, 2026
Mortgage Notes Payable		$ 4,267	4,973
Mortgage Notes Payable [Member] | Oklahoma City, OK (Amazon) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.64%
Maturity date		Dec. 01, 2027
Mortgage Notes Payable		$ 16,501	17,369
Mortgage Notes Payable [Member] | Olive Branch, MS (Memphis, TN) (Milwaukee Tool) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.76%
Maturity date		Oct. 01, 2028
Mortgage Notes Payable		$ 16,095	18,042
Mortgage Notes Payable [Member] | Tulsa, OK [Member]
Debt Instrument [Line Items]
Fixed Rate		4.58%
Maturity date		Nov. 01, 2028
Mortgage Notes Payable		$ 1,267	1,413
Mortgage Notes Payable [Member] | Oklahoma City, OK (Bunzl) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.13%
Maturity date		Jul. 01, 2029
Mortgage Notes Payable		$ 4,243	4,692
Mortgage Notes Payable [Member] | Lindale, TX (Tyler) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.57%
Maturity date		Nov. 01, 2029
Mortgage Notes Payable		$ 4,393	4,827
Mortgage Notes Payable [Member] | Sauget, IL (St. Louis, MO) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.40%
Maturity date		Nov. 01, 2029
Mortgage Notes Payable		$ 6,659	7,322
Mortgage Notes Payable [Member] | Jacksonville, FL (FDX Ground) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.93%
Maturity date		Dec. 01, 2029
Mortgage Notes Payable		$ 12,587	13,854
Mortgage Notes Payable [Member] | Lancaster, OH (Columbus) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.47%
Maturity date		Jan. 01, 2030
Mortgage Notes Payable		$ 8,311	9,091
Mortgage Notes Payable [Member] | Imperial, PA (Pittsburgh) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.63%
Maturity date		Apr. 01, 2030
Mortgage Notes Payable		$ 8,734	9,586
Mortgage Notes Payable [Member] | Monroe, OH (Cincinnati) [Member]
Debt Instrument [Line Items]
Fixed Rate	[5]	3.77%
Maturity date	[5]	Apr. 01, 2030
Mortgage Notes Payable	[5]	$ 5,567	6,107
Mortgage Notes Payable [Member] | Monroe, OH, (Cincinnati) [Member]
Debt Instrument [Line Items]
Fixed Rate	[5]	3.85%
Maturity date	[5]	Apr. 01, 2030
Mortgage Notes Payable	[5]	$ 5,886	6,453
Mortgage Notes Payable [Member] | Greenwood, IN (Indianapolis) (Ulta) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.91%
Maturity date		Jun. 01, 2030
Mortgage Notes Payable		$ 15,855	17,346
Mortgage Notes Payable [Member] | Ft. Worth, TX (Dallas) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.56%
Maturity date		Sep. 01, 2030
Mortgage Notes Payable		$ 16,364	17,879
Mortgage Notes Payable [Member] | Concord, NC (Charlotte) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.87%
Maturity date		Dec. 01, 2030
Mortgage Notes Payable		$ 14,197	15,449
Mortgage Notes Payable [Member] | Covington, LA (New Orleans) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.08%
Maturity date		Jan. 01, 2031
Mortgage Notes Payable		$ 8,917	9,686
Mortgage Notes Payable [Member] | Burlington, WA (Seattle/Everett) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.67%
Maturity date		May 01, 2031
Mortgage Notes Payable		$ 14,264	15,471
Mortgage Notes Payable [Member] | Louisville, KY [Member]
Debt Instrument [Line Items]
Fixed Rate		3.74%
Maturity date		Jul. 01, 2031
Mortgage Notes Payable		$ 5,267	5,702
Mortgage Notes Payable [Member] | Colorado Springs, CO [Member]
Debt Instrument [Line Items]
Fixed Rate		3.90%
Maturity date		Jul. 01, 2031
Mortgage Notes Payable		$ 13,469	14,571
Mortgage Notes Payable [Member] | Davenport, FL (Orlando) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.89%
Maturity date		Sep. 01, 2031
Mortgage Notes Payable		$ 19,243	20,788
Mortgage Notes Payable [Member] | Olathe, KS (Kansas City) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.96%
Maturity date		Sep. 01, 2031
Mortgage Notes Payable		$ 16,217	17,513
Mortgage Notes Payable [Member] | Hamburg, NY (Buffalo) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.03%
Maturity date		Nov. 01, 2031
Mortgage Notes Payable		$ 17,411	18,770
Mortgage Notes Payable [Member] | Ft. Myers, FL [Member]
Debt Instrument [Line Items]
Fixed Rate		3.97%
Maturity date		Jan. 01, 2032
Mortgage Notes Payable		$ 10,873	11,707
Mortgage Notes Payable [Member] | Savannah, GA (Shaw) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.53%
Maturity date		Feb. 01, 2032
Mortgage Notes Payable		$ 26,273	28,324
Mortgage Notes Payable [Member] | Walker, MI (Grand Rapids) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.86%
Maturity date		May 01, 2032
Mortgage Notes Payable		$ 16,027	17,219
Mortgage Notes Payable [Member] | Mesquite, TX (Dallas) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.60%
Maturity date		Jul. 01, 2032
Mortgage Notes Payable		$ 25,461	27,350
Mortgage Notes Payable [Member] | Aiken, SC (Augusta GA) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.20%
Maturity date		Jul. 01, 2032
Mortgage Notes Payable		$ 12,003	12,861
Mortgage Notes Payable [Member] | Homestead, FL (Miami) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.60%
Maturity date		Jul. 01, 2032
Mortgage Notes Payable		$ 19,193	20,616
Mortgage Notes Payable [Member] | Mobile, AL [Member]
Debt Instrument [Line Items]
Fixed Rate		4.14%
Maturity date		Jul. 01, 2032
Mortgage Notes Payable		$ 15,609	16,728
Mortgage Notes Payable [Member] | Concord, NC, (Charlotte) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.80%
Maturity date		Sep. 01, 2032
Mortgage Notes Payable		$ 20,587	22,067
Mortgage Notes Payable [Member] | Kenton, OH [Member]
Debt Instrument [Line Items]
Fixed Rate		4.45%
Maturity date		Oct. 01, 2032
Mortgage Notes Payable		$ 9,592	10,247
Mortgage Notes Payable [Member] | Stow, OH [Member]
Debt Instrument [Line Items]
Fixed Rate		4.17%
Maturity date		Oct. 01, 2032
Mortgage Notes Payable		$ 10,106	10,809
Mortgage Notes Payable [Member] | Charleston, SC (FDX) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.23%
Maturity date		Dec. 01, 2032
Mortgage Notes Payable		$ 11,444	12,222
Mortgage Notes Payable [Member] | Daytona Beach, FL [Member]
Debt Instrument [Line Items]
Fixed Rate		4.25%
Maturity date		May 31, 2033
Mortgage Notes Payable		$ 16,170	17,219
Mortgage Notes Payable [Member] | Charleston, SC (FDX Ground) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.82%
Maturity date		Sep. 01, 2033
Mortgage Notes Payable		$ 25,171	26,794
Mortgage Notes Payable [Member] | Braselton, GA (Atlanta) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.02%
Maturity date		Oct. 01, 2033
Mortgage Notes Payable		$ 33,730	35,856
Mortgage Notes Payable [Member] | Buckner, KY (Louisville) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.17%
Maturity date		Nov. 01, 2033
Mortgage Notes Payable		$ 12,993	13,796
Mortgage Notes Payable [Member] | Trenton, NJ [Member]
Debt Instrument [Line Items]
Fixed Rate		4.13%
Maturity date		Nov. 01, 2033
Mortgage Notes Payable		$ 47,039	49,955
Mortgage Notes Payable [Member] | Savannah, GA (FDX Ground) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.40%
Maturity date		Dec. 01, 2033
Mortgage Notes Payable		$ 15,091	16,001
Mortgage Notes Payable [Member] | Lafayette, IN [Member]
Debt Instrument [Line Items]
Fixed Rate		4.25%
Maturity date		Aug. 01, 2034
Mortgage Notes Payable		$ 15,234	16,101
Mortgage Notes Payable [Member] | Whitsett, NC (Greensboro) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.10%
Maturity date		Jun. 01, 2035
Mortgage Notes Payable		$ 28,277	29,902
Mortgage Notes Payable [Member] | Ogden, UT (Salt Lake City) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.18%
Maturity date		Jun. 01, 2035
Mortgage Notes Payable		$ 7,805	8,251
Mortgage Notes Payable [Member] | Oklahoma City, OK, (Amazon) [Member]
Debt Instrument [Line Items]
Fixed Rate		3.00%
Maturity date		Oct. 01, 2035
Mortgage Notes Payable		$ 9,272	9,750
Mortgage Notes Payable [Member] | Plain City (Columbus), OH [Member]
Debt Instrument [Line Items]
Fixed Rate		2.95%
Maturity date		Jan. 01, 2036
Mortgage Notes Payable		$ 45,322	0
Mortgage Notes Payable [Member] | Greenwood (Indianapolis), IN (Amazon II) [Member]
Debt Instrument [Line Items]
Fixed Rate		4.27%
Maturity date		Nov. 01, 2037
Mortgage Notes Payable		$ 48,802	50,855
Mortgage Notes Payable [Member] | Locust Grove (Atlanta), GA [Member]
Debt Instrument [Line Items]
Fixed Rate		3.25%
Maturity date		Jan. 01, 2038
Mortgage Notes Payable		$ 55,307	$ 0

[1] Loan was paid in full during fiscal 2021.

[2] Loan was paid in full subsequent to fiscal yearend 2021 on November 1, 2021.

[3] One self-amortizing loan is secured by Altoona, PA, Green Bay, WI and Stewartville (Rochester), MN.

[4] This property was sold during fiscal 2021 and loan was paid in full at closing.

[5] Two self-amortizing loans secured by same property.