Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2018	Sep. 30, 2017
Accumulated amortization of intangible assets	$ 13,267,014	$ 13,404,318
Accumulated amortization of lease costs	3,331,272	3,393,187
Accumulated amortization of financing costs	$ 807,345	$ 619,555
Common stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	192,039,750	192,039,750
Common Stock, shares issued	78,846,177	75,630,521
Common Stock, shares outstanding	78,846,177	75,630,521
Excess Stock, par value	$ 0.01	$ 0.01
Excess Stock , shares authorized	200,000,000	200,000,000
Excess Stock , shares issued
Excess Stock , shares outstanding
Series C Preferred Stock [Member]
Cumulative redeemable preferred, stock dividend rate	6.125%	6.125%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	12,400,000	12,400,000
Preferred stock, shares issued	11,095,376	9,839,445
Preferred stock, shares outstanding	11,095,376	9,839,445