Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 32,494,507	$ 25,605,815	$ 19,845,294
Noncash Items Included in Net Income:
Depreciation & Amortization	27,203,918	23,058,744	18,445,326
Stock Compensation Expense	926,465	448,895	347,002
Gain on Sale of Securities Transactions, net	(4,398,599)	(805,513)	(2,166,766)
Gain on Sale of Real Estate Investments	0	(5,021,242)	0
Changes in:
Tenant, Deferred Rent & Other Receivables	(1,640,504)	(800,203)	(922,107)
Prepaid Expenses	(899,371)	(1,166,821)	(563,525)
Other Assets and Capitalized Lease Costs	(1,814,638)	(2,359,895)	(1,086,846)
Accounts Payable, Accrued Expenses & Other Liabilities	2,827,722	(897,495)	957,907
NET CASH PROVIDED BY OPERATING ACTIVITIES	54,699,500	38,062,285	34,856,285
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of Real Estate & Intangible Assets	(210,747,340)	(192,187,485)	(97,374,760)
Capital and Land Site Improvements	(21,566,561)	(10,541,656)	(19,674,128)
Proceeds on Sale of Real Estate	0	8,846,686	0
Return of Deposits on Real Estate	2,950,000	3,100,000	2,050,000
Deposits Paid on Acquisitions of Real Estate	(2,200,000)	(3,700,000)	(3,250,000)
Purchase of Securities Available for Sale	(19,055,956)	(16,188,760)	(27,840,200)
Proceeds from Sale of Securities Available for Sale	22,774,768	16,201,480	14,279,391
NET CASH USED IN INVESTING ACTIVITIES	(227,845,089)	(194,469,735)	(131,809,697)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from Mortgage Notes Payable	153,428,485	122,173,058	62,905,000
Principal Payments on Mortgage Notes Payable	(43,671,506)	(35,977,890)	(25,202,376)
Net (Repayments) Proceeds from Loans Payable	(4,250,702)	59,841,386	3,000,000
Financing Costs Paid on Debt	(2,646,393)	(2,917,663)	(2,070,790)
Proceeds from Underwritten Public Offering of Preferred Stock, net of offering costs	130,543,422	0	0
Proceeds from Underwritten Public Offering of CommonStock, net of offering costs	0	0	65,112,686
Proceeds from Issuance of Common Stock in the DRIP, netof Dividend Reinvestments	63,806,651	39,915,387	30,465,806
Proceeds from the Exercise of Stock Options	1,883,300	612,410	1,327,169
Preferred Dividends Paid	(8,607,032)	(8,607,032)	(8,607,032)
Common Dividends Paid, net of Reinvestments	(33,665,037)	(27,032,958)	(21,906,902)
NET CASH PROVIDED BY FINANCING ACTIVITIES	256,821,188	148,006,698	105,023,561
Net Increase (Decrease) in Cash and Cash Equivalents	83,675,599	(8,400,752)	8,070,149
Cash and Cash Equivalents at Beginning of Year	12,073,909	20,474,661	12,404,512
CASH AND CASH EQUIVALENTS AT END OF YEAR	$ 95,749,508	$ 12,073,909	$ 20,474,661