Taxes - Schedule of Net Income and Taxable Income (Details) - USD ($)	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Net income applicable to common shareholders	$ 4,685,265	$ 6,079,537	$ 4,980,189	$ 4,786,897	$ 8,035,867	$ 3,024,100	$ 2,666,922	$ 3,271,894	$ 20,531,888	$ 16,998,783	$ 11,238,262
Book / tax difference on gains realized from capital transactions									(4,398,599)	(5,824,405)	(2,166,766)
Stock compensation expense									926,465	448,895	347,002
Deferred compensation									0	0	0
Other book / tax differences, net									(232,914)	2,342,751	(150,831)
Taxable income before adjustments									16,826,840	13,966,024	9,267,667
Add/(Less): capital gains (losses)									3,774,099	5,000,683	973,761
Estimated taxable income subject to 90% dividend requirement									$ 20,600,939	$ 18,966,707	$ 10,241,428