Acquisitions, Expansions and Disposition (Details Narrative)																										1 Months Ended		12 Months Ended
	Aug. 26, 2016 USD ($) ft²	Aug. 19, 2016 USD ($) ft²	Aug. 01, 2016 USD ($) ft² $ / shares	Jul. 29, 2016 USD ($) ft² $ / shares	Jun. 30, 2016 USD ($) ft²	Jun. 09, 2016 USD ($) ft²	Apr. 08, 2016 USD ($) ft²	Mar. 08, 2016 USD ($) ft²	Dec. 02, 2015 USD ($) ft²	Nov. 13, 2015 USD ($) ft²	Sep. 25, 2015 USD ($) ft²	Sep. 18, 2015 USD ($) ft²	Aug. 31, 2015 USD ($) ft² $ / shares	Aug. 14, 2015 USD ($) ft²	Jun. 30, 2015 USD ($) ft² $ / shares	May 07, 2015 USD ($) ft²	Mar. 13, 2015 USD ($) ft²	Feb. 26, 2015 USD ($) ft²	Jan. 01, 2015 USD ($) $ / shares	Dec. 31, 2014 USD ($) ft²	Dec. 12, 2014 USD ($) ft²	Nov. 25, 2014 USD ($) ft²	Oct. 14, 2014 USD ($) ft²	Oct. 10, 2014 USD ($) ft²	Oct. 03, 2014 USD ($) ft²	Sep. 30, 2016 USD ($) a	Sep. 30, 2013 USD ($) ft² $ / shares	Sep. 30, 2016 USD ($) a $ / shares
Colorado Springs, CO [Member]
Purchase of industrial building | ft²						225,362
Percentage of real estate property leased						100.00%
Lease expiration date description						ten years through January 2026
Purchase price of industrial building						$ 28,845,500
lease term						15 years
Face amount of mortgages						$ 18,730,000
Mortgage loans on real estate, interest rate						3.90%
Annual rental income over the remaining term of lease						$ 1,832,000
Intangible asset related to the lease in-place						$ 345,500
Louisville, KY [Member]
Purchase of industrial building | ft²					137,500
Percentage of real estate property leased					100.00%
Lease expiration date description					ten years through June 2026
Purchase price of industrial building					$ 11,304,000
lease term					15 years
Face amount of mortgages					$ 7,350,000
Mortgage loans on real estate, interest rate					3.74%
Annual rental income over the remaining term of lease					$ 835,000
Olive Branch, MS [Member]
Expansion square feet | ft²				246,434
Lease expiration date description				April 2023 through July 2028
Cost of building expansion				$ 9,785,000
lease term																												12 years
Face amount of mortgages																										$ 25,000,000		$ 13,158,000
Mortgage loans on real estate, interest rate																										3.76%		3.76%
Lease on real estate terms				12 years
Rent increase to after expansion				$ 2,790,000
Rent increase to expansion per square foot | $ / shares				$ 3.24
Percentage of annual rent increase				1.50%
Annualized rent after expansion				$ 3,020,000
Annualized rent after expansion, per square foot				3.50
Lease expiration date																										Jan. 31, 2023		Oct. 31, 2028
Olive Branch, MS [Member] | Minimum [Member]
Square feet before expansion | ft²				615,455
Increase in annual rent				$ 847,000
Olive Branch, MS [Member] | Maximum [Member]
Size of building after acquisition | ft²				861,889
Rent prior to expansion				$ 1,943,000
Rent prior to expansion, per square foot | $ / shares				$ 3.16
Tampa, FL [Member]
Lease expiration date description			June 2024 through July 2026
Lease period			10 years
Rent prior to expansion			$ 1,493,000
Increase in annual rent			$ 131,000
Rent prior to expansion, per square foot | $ / shares			$ 8.74
Rent increase to after expansion			$ 1,624,000
Rent increase to after expansion, per square foot | $ / shares			$ 9.51
Cost of parking expansion			$ 1,303,000
Huntsville, AL [Member]
Expansion square feet | ft²			14,941
Lease expiration date description			August 2022 through July 2026
Cost of building expansion			$ 1,925,000
Lease period			10 years
Rent prior to expansion			$ 412,000
Increase in annual rent			$ 193,000
Rent prior to expansion, per square foot | $ / shares			$ 5.59
Rent increase to after expansion			$ 605,000
Rent increase to after expansion, per square foot | $ / shares			$ 6.82
Rockford, IL [Member]
Purchase of industrial building | ft²																							38,833
Percentage of real estate property leased																							100.00%
Lease expiration date description																							fifteen years through June 2027
Purchase price of industrial building																							$ 5,200,000
Face amount of mortgages																							359,000
Intangible asset related to the lease in-place																							$ 100,000
Kansas City, MO [Member]
Purchase of industrial building | ft²																						158,417
Percentage of real estate property leased																						100.00%
Lease expiration date description																						seven years through September 2021
Purchase price of industrial building																						$ 9,635,770
Mortgage loan period																						7 years
Face amount of mortgages																						$ 7,226,828
Mortgage loans on real estate, interest rate																						5.18%
Annual rental income over the remaining term of lease																						$ 736,000
Intangible asset related to the lease in-place																						$ 35,770
Mortgage loans on real estate, amortization period																						25 years
Jacksonville, FL [Member]
Purchase of industrial building | ft²																		297,579
Percentage of real estate property leased																		100.00%
Lease expiration date description																		fifteen years through December 2029
Purchase price of industrial building																		$ 30,645,954
lease term																		15 years
Face amount of mortgages																		$ 20,000,000
Mortgage loans on real estate, interest rate																		3.93%
Annual rental income over the remaining term of lease																		$ 1,992,000
Cincinnati, OH [Member]
Purchase of industrial building | ft²											63,840
Percentage of real estate property leased											100.00%
Lease expiration date description											fifteen years through August 2029
Purchase price of industrial building											$ 6,800,000
Annual rental income over the remaining term of lease											480,000
Intangible asset related to the lease in-place											$ 50,000
El Paso, TX [Member]
Expansion square feet | ft²																											51,765
Lease expiration date description																											September 2015 through September 2023
Cost of building expansion																											$ 3,800,000
lease term																											10 years
Rent prior to expansion																											$ 667,584
Rent prior to expansion, per square foot | $ / shares																											$ 7.27
Rent increase to after expansion															$ 1,345,289												$ 1,045,610
Rent increase to after expansion, per square foot | $ / shares															$ 9.33												$ 7.25
Cost of parking expansion															$ 2,472,000
Monaca (Pittsburgh), PA [Member]
Expansion square feet | ft²																				62,260
Lease expiration date description																				September 2018 through December 2024
Cost of building expansion																				$ 4,503,000
lease term																				10 years
Rent prior to expansion																			$ 381,805
Rent prior to expansion, per square foot | $ / shares																			$ 3.39
Rent increase to after expansion																			$ 820,000
Rent increase to after expansion, per square foot | $ / shares																			$ 4.69
Monaca (Pittsburgh), PA [Member] | January 1, 2020 [Member]
lease term																												10 years
Rent prior to expansion																												$ 841,600
Rent prior to expansion, per square foot | $ / shares																												$ 4.81
Rent increase to after expansion																												$ 830,800
Rent increase to after expansion, per square foot | $ / shares																												$ 4.75
Oklahoma City, OK [Member]
Expansion square feet | ft²															38,428
Lease expiration date description															March 2022 through June 2025
Cost of building expansion															$ 3,332,000
lease term															10 years
Rent prior to expansion															$ 712,532
Rent prior to expansion, per square foot | $ / shares															$ 5.94
Rent increase to after expansion															$ 1,048,250
Rent increase to after expansion, per square foot | $ / shares															$ 6.62
Waco, TX [Member]
Expansion square feet | ft²													48,116
Lease expiration date description													May 2022 through August 2025
Cost of building expansion													$ 4,125,000
lease term													10 years
Rent prior to expansion													$ 659,324
Rent prior to expansion, per square foot | $ / shares													$ 6.43
Rent increase to after expansion													$ 1,078,383
Rent increase to after expansion, per square foot | $ / shares													$ 7.16
Monroe, NC [Member]
Sales price of industrial building												$ 9,000,000
Net proceeds from sale of property												8,847,000
Rent prior to sale of property												571,000
Real estate property historic cost												$ 5,557,000
Description of property sold												The Company purchased this property in 2001 and it had a historic cost basis of approximately $5,557,000 and a net book value (net of accumulated depreciation) of approximately $3,825,000. The sale resulted in a realized gain of approximately $5,021,000, representing a 131% gain over the depreciated U.S. GAAP basis and a realized gain on a historic cost of approximately $3,290,000, representing a 59% gain over the Company’s historic cost basis.
Real estate property book value												$ 3,825,000
Gain on sale of property												5,021,000
Realized gain on sale of property historic cost												$ 3,290,000
Sale of industrial building, ft | ft²												160,000
White Bear Lake, MN [Member] | October 27, 2016 [Member]
Occupancy prior to sale																										99.60%		99.60%
Occupancy after the sale																										100.00%		100.00%
Real estate property book value																										$ 4,272,000		$ 4,272,000
Square feet of property sold																										$ 59,425		$ 59,425
Area of property | a																										4.78		4.78
Charlotte Metropolitan Statistical Area [Member] | Concord, NC [Member]
Purchase of industrial building | ft²										330,717
Percentage of real estate property leased										100.00%
Lease expiration date description										ten years through July 2025
Purchase price of industrial building										$ 31,975,897
lease term										15 years
Face amount of mortgages										$ 20,780,000
Mortgage loans on real estate, interest rate										3.87%
Annual rental income over the remaining term of lease										$ 2,078,000
New Orleans MSA [Member] | Covington, LA [Member]
Purchase of industrial building | ft²									175,315
Percentage of real estate property leased									100.00%
Lease expiration date description									ten years through June 2025
Purchase price of industrial building									$ 18,410,000
lease term									15 years
Face amount of mortgages									$ 12,890,000
Mortgage loans on real estate, interest rate									4.08%
Annual rental income over the remaining term of lease									$ 1,258,000
Pittsburgh MSA [Member] | Imperial, PA [Member]
Purchase of industrial building | ft²								125,860
Percentage of real estate property leased								100.00%
Lease expiration date description								ten years through December 2025
Purchase price of industrial building								$ 20,032,864
lease term								14 years
Face amount of mortgages								$ 13,000,000
Mortgage loans on real estate, interest rate								3.63%
Annual rental income over the remaining term of lease								$ 1,311,000
Intangible asset related to the lease in-place								$ 82,864
Seattle/Everett MSA [Member] | Burlington, WA [Member]
Purchase of industrial building | ft²							210,445
Percentage of real estate property leased							100.00%
Lease expiration date description							fifteen years through August 2030
Purchase price of industrial building							$ 30,662,080
lease term							15 years
Face amount of mortgages							$ 20,221,000
Mortgage loans on real estate, interest rate							3.67%
Annual rental income over the remaining term of lease							$ 1,962,000
Intangible asset related to the lease in-place							$ 451,400
Orlando MSA [Member] | Davenport, FL [Member]
Purchase of industrial building | ft²		310,922
Percentage of real estate property leased		100.00%
Lease expiration date description		fifteen years through April 2031
Purchase price of industrial building		$ 37,780,000
lease term		15 years
Face amount of mortgages		$ 26,400,000
Mortgage loans on real estate, interest rate		3.89%
Annual rental income over the remaining term of lease		$ 2,604,000
Kansas City MSA [Member] | Olathe, KS [Member]
Purchase of industrial building | ft²	313,763
Percentage of real estate property leased	100.00%
Lease expiration date description	fifteen years through May 2031
Purchase price of industrial building	$ 31,737,000
lease term	15 years
Face amount of mortgages	$ 22,215,000
Mortgage loans on real estate, interest rate	3.96%
Annual rental income over the remaining term of lease	$ 2,196,000
Tyler MSA [Member] | Lindale, TX [Member]
Purchase of industrial building | ft²																									163,378
Percentage of real estate property leased																									100.00%
Lease expiration date description																									ten years through June 2024
Purchase price of industrial building																									$ 10,271,355
lease term																									15 years
Face amount of mortgages																									$ 7,000,000
Mortgage loans on real estate, interest rate																									4.57%
Annual rental income over the remaining term of lease																									$ 725,000
Intangible asset related to the lease in-place																									$ 341,355
St. Louis, MO MSA [Member] | Sauget, IL [Member]
Purchase of industrial building | ft²																								198,773
Percentage of real estate property leased																								100.00%
Lease expiration date description																								fifteen years through May 2029
Purchase price of industrial building																								$ 15,231,000
lease term																								15 years
Face amount of mortgages																								$ 10,660,000
Mortgage loans on real estate, interest rate																								4.40%
Annual rental income over the remaining term of lease																								$ 1,036,000
Intangible asset related to the lease in-place																								$ 31,000
Lexington MSA [Member] | Frankfort, KY [Member]
Purchase of industrial building | ft²																					599,840
Percentage of real estate property leased																					100.00%
Lease expiration date description																					ten years through January 2025
Purchase price of industrial building																					$ 28,000,000
lease term																					10 years
Face amount of mortgages																					$ 19,600,000
Mortgage loans on real estate, interest rate																					4.84%
Annual rental income over the remaining term of lease																					$ 1,989,000
Mortgage loans on real estate, amortization period description																					amortizing over 18 years during the first 30 months, amortizing over 14 years during the next 30 months, amortizing over 11 years during the next 30 months and amortizing over 8 years during the final 30 months.
Cincinnati MSA [Member] | Monroe, OH [Member]
Purchase of industrial building | ft²																	232,200
Percentage of real estate property leased																	100.00%
Lease expiration date description																	fifteen years through February 2030
Purchase price of industrial building																	$ 13,416,000
lease term																	15 years
Face amount of mortgages																	$ 8,700,000
Mortgage loans on real estate, interest rate																	3.77%
Annual rental income over the remaining term of lease																	$ 1,045,000
Intangible asset related to the lease in-place																	$ 479,000
Indianapolis MSA [Member] | Greenwood, IN [Member]
Purchase of industrial building | ft²																671,354
Percentage of real estate property leased																100.00%
Lease expiration date description																ten years through July 2025
Purchase price of industrial building																$ 37,484,574
lease term																15 years
Face amount of mortgages																$ 24,286,230
Mortgage loans on real estate, interest rate																3.91%
Annual rental income over the remaining term of lease																$ 2,644,000
Dallas MSA [Member] | Fort Worth, TX [Member]
Purchase of industrial building | ft²														304,608
Percentage of real estate property leased														100.00%
Lease expiration date description														fifteen years through April 2030
Purchase price of industrial building														$ 35,300,832
lease term														15 years
Face amount of mortgages														$ 24,700,000
Mortgage loans on real estate, interest rate														3.56%
Annual rental income over the remaining term of lease														$ 2,362,000