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Stockholders' Equity - Treasury Shares (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Equity, Class of Treasury Stock [Line Items]
Total cost of treasury shares acquired		$ 571,083	$ 537,014	$ 1,263,402
Common Stock
Equity, Class of Treasury Stock [Line Items]
Number of treasury shares acquired (shares)		73,208	83,675	218,682
Common Stock | 2015 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Number of treasury shares acquired (shares)	265,762	73,208	83,675	218,682
Average cost per share (in USD per share)	$ 6.05	$ 7.80	$ 6.42	$ 5.78
Total cost of treasury shares acquired	$ 1,609,008	$ 571,083	$ 537,014	$ 1,263,402

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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