Subsequent Events (Details Narrative)				12 Months Ended
	Oct. 17, 2016 USD ($) ft²	Oct. 14, 2016 USD ($) $ / shares	Oct. 03, 2016 USD ($) $ / shares	Sep. 30, 2016 USD ($) ft² $ / shares shares	Sep. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2014 USD ($) $ / shares	Oct. 27, 2016 USD ($) ft² a	Oct. 02, 2016 USD ($) ft²	Sep. 14, 2016 shares
Subsequent Event [Line Items]
Preferred Stock Called for Redemption				$ 53,493,750	$ 0
Preferred stock cash payment per share | $ / shares				$ (0.14)	$ (0.14)	$ (0.17)
Preferred stock total dividend value				$ 9,020,470	$ 8,607,032	$ 8,607,032
Series A Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock, shares issued | shares				0	2,139,750
Preferred stock, shares outstanding | shares				0	2,139,750
Cumulative redeemable preferred, stock dividend rate					7.625%
Preferred stock cash payment per share | $ / shares				$ 1.90625	$ 1.90625	$ 1.90625
Preferred stock total dividend value				$ 4,078,902	$ 4,078,902	$ 4,078,902
Subsequent Event [Member]
Subsequent Event [Line Items]
Rent prior to expansion			$ 499,000
Subsequent Event [Member] | Series A Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock, shares issued | shares									2,139,750
Preferred stock, shares outstanding | shares									2,139,750
Cumulative redeemable preferred, stock dividend rate		7.625%		7.625%					7.625%
Preferred stock redemption price | $ / shares		$ 25.00
Preferred Stock Called for Redemption		$ 53,493,750
Preferred stock accrued dividend per share | $ / shares		$ 0.23299
Preferred stock called for cash payment		$ 498,540
Preferred stock cash payment per share | $ / shares		$ 25.23299
Preferred stock total dividend value		$ 53,992,290
Deemed dividend				$ 2,942,149
Subsequent Event [Member] | Dividend One [Member] | Board of Directors [Member]
Subsequent Event [Line Items]
Dividend declared per share | $ / shares			$ 0.16
Dividends payable, date to be paid			Dec. 15, 2016
Dividend payable date of record			Nov. 15, 2016
Subsequent Event [Member] | Dividend Two [Member] | Board of Directors [Member]
Subsequent Event [Line Items]
Dividend declared per share | $ / shares			$ 0.4921875
Dividends payable, date to be paid			Dec. 15, 2016
Dividend payable date of record			Nov. 15, 2016
Subsequent Event [Member] | Dividend Three [Member] | Board of Directors [Member]
Subsequent Event [Line Items]
Dividend declared per share | $ / shares			$ 0.3317708
Dividends payable, date to be paid			Dec. 15, 2016
Dividend payable date of record			Nov. 15, 2016
Subsequent Event [Member] | Fiscal 2017 [Member]
Subsequent Event [Line Items]
Purchase of industrial building | ft²				16,340,000
Rent increased to after expansion of building located in Edinburg, TX				6.68%
Subsequent Event [Member] | Vacant Building [Member]
Subsequent Event [Line Items]
Square foot of building sold | ft²							59,425
Subsequent Event [Member] | White Bear Lake MN [Member]
Subsequent Event [Line Items]
Occupancy prior to sale							100.00%
Occupancy after the sale							99.60%
Total acres of property | a							4.78
Sales price of industrial building							$ 4,272,000
Subsequent Event [Member] | Fedex Ground Package System Inc. [Member] | Edinburg [Member]
Subsequent Event [Line Items]
Expansion of industrial building located in Edinburg, TX | ft²								50,741
Cost of expansion								$ 4,988,000
Lease term			10 years
Lease expiration date description			September 2021 through September 2026
Rent prior to expansion			$ 598,000
Rent increased to expansion, per square foot | $ / shares			$ 5.27
Rent increased to after expansion			$ 1,097,000
Rent increased to expansion per square foot | $ / shares			$ 6.68
Subsequent Event [Member] | Buffalo MSA [Member] | Hamburg, NY [Member]
Subsequent Event [Line Items]
Purchase of industrial building | ft²	338,584
Purchase price of industrial building	$ 35,100,000
Lease expiration date description	fifteen years through March 2031
Percentage of real estate property leased	100.00%
Mortgage loans on real estate, term of loan	15 years
Face amount of mortgages	$ 23,500,000
Mortgage loans on real estate, interest rate	4.03%
Annual rental income over the remaining term of lease	$ 2,308,000