SUMMARY OF MORTGAGE NOTES PAYABLE (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Obligation with Joint and Several Liability Arrangement [Line Items]
Mortgage Notes Payable	$ 752,900
Mortgage Notes Payable [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Mortgage Notes Payable	$ 752,916	$ 719,768
Mortgage Notes Payable [Member] | Tampa, FL (FDX Ground) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	6.00%
Maturity date	Mar. 01, 2019
Mortgage Notes Payable	$ 0	5,144
Mortgage Notes Payable [Member] | Lebanon T N Nashville [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	7.60%
Maturity date	Jul. 10, 2019
Mortgage Notes Payable	$ 0	7,217
Mortgage Notes Payable [Member] | Ft Mill S C Charlotte N C [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	7.00%
Maturity date	Oct. 10, 2019
Mortgage Notes Payable	$ 0	725
Mortgage Notes Payable [Member] | Denver, CO [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	6.07%
Maturity date	Nov. 01, 2019
Mortgage Notes Payable	$ 0	414
Mortgage Notes Payable [Member] | Hanahan S C Charleston F D X Ground [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	5.54%
Maturity date	Jan. 21, 2020
Mortgage Notes Payable	$ 0	466
Mortgage Notes Payable [Member] | Augusta, GA (FDX Ground) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	5.54%
Maturity date	Feb. 01, 2020
Mortgage Notes Payable	$ 102	339
Mortgage Notes Payable [Member] | Huntsville, AL [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	5.50%
Maturity date	Mar. 01, 2020
Mortgage Notes Payable	$ 140	371
Mortgage Notes Payable [Member] | Topeka, KS [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	6.50%
Maturity date	Aug. 10, 2021
Mortgage Notes Payable	$ 584	860
Mortgage Notes Payable [Member] | Streetsboro O H Cleveland [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	5.50%
Maturity date	Nov. 01, 2021
Mortgage Notes Payable	$ 8,680	9,300
Mortgage Notes Payable [Member] | Kansas City, MO [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	5.18%
Maturity date	Dec. 01, 2021
Mortgage Notes Payable	$ 6,457	6,633
Mortgage Notes Payable [Member] | Olive Branch M S Memphis T N Anda Pharmaceuticals Inc [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.80%
Maturity date	Apr. 01, 2022
Mortgage Notes Payable	$ 6,927	7,564
Mortgage Notes Payable [Member] | Waco, TX [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.75%
Maturity date	Aug. 01, 2022
Mortgage Notes Payable	$ 3,931	4,235
Mortgage Notes Payable [Member] | Houston, TX [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	6.88%
Maturity date	Sep. 10, 2022
Mortgage Notes Payable	$ 1,643	2,148
Mortgage Notes Payable [Member] | Tolleson A Z Phoenix [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.95%
Maturity date	Nov. 01, 2022
Mortgage Notes Payable	$ 2,882	3,720
Mortgage Notes Payable [Member] | Edwardsville K S Kansas City International Paper [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.45%
Maturity date	Nov. 01, 2023
Mortgage Notes Payable	$ 8,421	9,189
Mortgage Notes Payable [Member] | Spring T X Houston [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.01%
Maturity date	Dec. 01, 2023
Mortgage Notes Payable	$ 7,287	7,925
Mortgage Notes Payable [Member] | Memphis, TN [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.50%
Maturity date	Jan. 01, 2024
Mortgage Notes Payable	$ 4,202	5,061
Mortgage Notes Payable [Member] | Oklahoma City, OK (FDX Ground) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.35%
Maturity date	Jul. 01, 2024
Mortgage Notes Payable	$ 2,890	3,416
Mortgage Notes Payable [Member] | Indianapolis IN [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.00%
Maturity date	Sep. 01, 2024
Mortgage Notes Payable	$ 9,454	10,437
Mortgage Notes Payable [Member] | Frankfort K Y Lexington [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.84%
Maturity date	Dec. 15, 2024
Mortgage Notes Payable	$ 15,672	16,639
Mortgage Notes Payable [Member] | Carrollton T X Dallas [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	6.75%
Maturity date	Feb. 01, 2025
Mortgage Notes Payable	$ 5,623	6,456
Mortgage Notes Payable [Member] | Altoona, PA [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.00%
Maturity date	Oct. 01, 2025
Mortgage Notes Payable	$ 2,848	3,253
Mortgage Notes Payable [Member] | Green Bay, WI [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.00%
Maturity date	Oct. 01, 2025
Mortgage Notes Payable	$ 2,311	2,640
Mortgage Notes Payable [Member] | Stewartville M N Rochester [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.00%
Maturity date	Oct. 01, 2025
Mortgage Notes Payable	$ 1,852	2,116
Mortgage Notes Payable [Member] | Carlstadt, NJ (New York, NY) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	5.25%
Maturity date	May 15, 2026
Mortgage Notes Payable	$ 1,408	1,580
Mortgage Notes Payable [Member] | Roanoke, VA (FDX Ground) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.84%
Maturity date	Jul. 01, 2026
Mortgage Notes Payable	$ 3,905	4,395
Mortgage Notes Payable [Member] | Livonia M I Detroit [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.45%
Maturity date	Dec. 01, 2026
Mortgage Notes Payable	$ 5,649	6,295
Mortgage Notes Payable [Member] | Oklahoma City, OK (Amazon) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.64%
Maturity date	Dec. 01, 2027
Mortgage Notes Payable	$ 18,206	19,014
Mortgage Notes Payable [Member] | Olive Branch, MS (Memphis, TN) (Milwaukee Tool) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.76%
Maturity date	Oct. 01, 2028
Mortgage Notes Payable	$ 19,917	21,723
Mortgage Notes Payable [Member] | Tulsa, OK [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.58%
Maturity date	Nov. 01, 2028
Mortgage Notes Payable	$ 1,552	1,685
Mortgage Notes Payable [Member] | Oklahoma City, OK (Bunzl) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.13%
Maturity date	Jul. 01, 2029
Mortgage Notes Payable	$ 5,124	5,538
Mortgage Notes Payable [Member] | Lindale T X Tyler [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.57%
Maturity date	Nov. 01, 2029
Mortgage Notes Payable	$ 5,242	5,638
Mortgage Notes Payable [Member] | Sauget I L St Louis M O [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.40%
Maturity date	Nov. 01, 2029
Mortgage Notes Payable	$ 7,956	8,564
Mortgage Notes Payable [Member] | Jacksonville, FL (FDX Ground) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.93%
Maturity date	Dec. 01, 2029
Mortgage Notes Payable	$ 15,072	16,244
Mortgage Notes Payable [Member] | Imperial P A Pittsburgh [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.63%
Maturity date	Apr. 01, 2030
Mortgage Notes Payable	$ 10,407	11,200
Mortgage Notes Payable [Member] | Monroe, OH (Cincinnati) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.77%
Maturity date	Apr. 01, 2030
Mortgage Notes Payable	$ 6,626	7,126
Mortgage Notes Payable [Member] | Monroe O H Cincinnati One [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.85%
Maturity date	Apr. 01, 2030
Mortgage Notes Payable	$ 7,000	0
Mortgage Notes Payable [Member] | Greenwood I N Indianapolis [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.91%
Maturity date	Jun. 01, 2030
Mortgage Notes Payable	$ 18,780	20,159
Mortgage Notes Payable [Member] | F T Worth T X Dallas [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.56%
Maturity date	Sep. 01, 2030
Mortgage Notes Payable	$ 19,342	20,754
Mortgage Notes Payable [Member] | Concord N C Charlotte [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.87%
Maturity date	Dec. 01, 2030
Mortgage Notes Payable	$ 16,654	17,813
Mortgage Notes Payable [Member] | Covington L A New Orleans [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.08%
Maturity date	Jan. 01, 2031
Mortgage Notes Payable	$ 10,425	11,134
Mortgage Notes Payable [Member] | Burlington W A Seattle Everett [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.67%
Maturity date	May 01, 2031
Mortgage Notes Payable	$ 16,635	17,757
Mortgage Notes Payable [Member] | Louisville, KY [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.74%
Maturity date	Jul. 01, 2031
Mortgage Notes Payable	$ 6,121	6,525
Mortgage Notes Payable [Member] | Colorado Springs, CO [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.90%
Maturity date	Jul. 01, 2031
Mortgage Notes Payable	$ 15,632	16,652
Mortgage Notes Payable [Member] | Davenport F L Orlando [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.89%
Maturity date	Sep. 01, 2031
Mortgage Notes Payable	$ 22,274	23,703
Mortgage Notes Payable [Member] | Olathe K S Kansas City [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.96%
Maturity date	Sep. 01, 2031
Mortgage Notes Payable	$ 18,759	19,957
Mortgage Notes Payable [Member] | Hamburg N Y Buffalo [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.03%
Maturity date	Nov. 01, 2031
Mortgage Notes Payable	$ 20,075	21,329
Mortgage Notes Payable [Member] | Ft. Myers, FL (FDX Ground) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.97%
Maturity date	Jan. 01, 2032
Mortgage Notes Payable	$ 12,510	13,281
Mortgage Notes Payable [Member] | Savannah, GA [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.53%
Maturity date	Feb. 01, 2032
Mortgage Notes Payable	$ 30,304	32,216
Mortgage Notes Payable [Member] | Walker M I Grand Rapids [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.86%
Maturity date	May 01, 2032
Mortgage Notes Payable	$ 18,365	19,469
Mortgage Notes Payable [Member] | Mesquite T X Dallas [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.60%
Maturity date	Jul. 01, 2032
Mortgage Notes Payable	$ 29,171	30,928
Mortgage Notes Payable [Member] | Aiken S C Augusta G A [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.20%
Maturity date	Jul. 01, 2032
Mortgage Notes Payable	$ 13,683	14,471
Mortgage Notes Payable [Member] | Homestead F L Miami [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.60%
Maturity date	Jul. 01, 2032
Mortgage Notes Payable	$ 21,989	23,314
Mortgage Notes Payable [Member] | Mobile, AL [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.14%
Maturity date	Jul. 01, 2032
Mortgage Notes Payable	$ 17,802	18,832
Mortgage Notes Payable [Member] | Concord N C Charlotte One [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.80%
Maturity date	Sep. 01, 2032
Mortgage Notes Payable	$ 23,492	24,863
Mortgage Notes Payable [Member] | Kenton, OH [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.45%
Maturity date	Oct. 01, 2032
Mortgage Notes Payable	$ 10,874	11,473
Mortgage Notes Payable [Member] | Stow, OH [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.17%
Maturity date	Oct. 01, 2032
Mortgage Notes Payable	$ 11,484	12,130
Mortgage Notes Payable [Member] | Charleston, SC (FDX) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.23%
Maturity date	Dec. 01, 2032
Mortgage Notes Payable	$ 12,968	13,683
Mortgage Notes Payable [Member] | Daytona Beach, FL [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.25%
Maturity date	May 31, 2033
Mortgage Notes Payable	$ 18,224	19,188
Mortgage Notes Payable [Member] | Charleston, SC (FDX Ground) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	3.82%
Maturity date	Sep. 01, 2033
Mortgage Notes Payable	$ 28,356	29,860
Mortgage Notes Payable [Member] | Braselton G A Atlanta [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.02%
Maturity date	Oct. 01, 2033
Mortgage Notes Payable	$ 37,898	39,700
Mortgage Notes Payable [Member] | Buckner K Y Louisville [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.17%
Maturity date	Nov. 01, 2033
Mortgage Notes Payable	$ 14,566	15,307
Mortgage Notes Payable [Member] | Trenton, NJ [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.13%
Maturity date	Nov. 01, 2033
Mortgage Notes Payable	$ 52,759	0
Mortgage Notes Payable [Member] | Savannah, GA (FDX Ground) [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.40%
Maturity date	Dec. 01, 2033
Mortgage Notes Payable	$ 16,872	0
Mortgage Notes Payable [Member] | Lafayette, IN [Member]
Obligation with Joint and Several Liability Arrangement [Line Items]
Fixed Rate	4.25%
Maturity date	Aug. 01, 2034
Mortgage Notes Payable	$ 16,932	$ 0