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Stockholders' Equity - Narrative (Details) - USD ($)	12 Months Ended		74 Months Ended	90 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2021	May 31, 2015
Class of Stock [Line Items]
Common stock, outstanding shares (in shares)	33,514,952	32,956,469	33,514,952	33,514,952
Common stock dividends paid	$ 4,342,082	$ 10,740,754		$ 74,500,000
Purchases of treasury stock (in shares)	2,632	449,921
Treasury stock acquired, average cost (in USD per share)	$ 2.79	$ 5.52
2015 Share Repurchase Program
Class of Stock [Line Items]
Repurchase amount	$ 4,000,000		$ 4,000,000	$ 4,000,000
Purchases of treasury stock (in shares)	0	440,666
Treasury stock acquired, average cost (in USD per share)	$ 0	$ 5.51
2015 Share Repurchase Program | Common Stock
Class of Stock [Line Items]
Amount authorized to be repurchased					$ 5,000,000.0
Purchases of treasury stock (in shares)	0		706,858
Treasury stock acquired, average cost (in USD per share)			$ 5.72

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