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Stockholders' Equity - Narrative (Details) - USD ($)	12 Months Ended		62 Months Ended	78 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2020	May 31, 2015
Class of Stock [Line Items]
Common stock, outstanding shares (in shares)	32,956,469	33,183,730	32,956,469	32,956,469
Common stock dividends paid	$ 10,740,754	$ 13,272,058		$ 70,200,000
Purchases of treasury stock (in shares)	449,921	18,424
Treasury stock acquired, average cost (in USD per share)	$ 5.52	$ 8.51
Common Stock
Class of Stock [Line Items]
Purchases of treasury stock (in shares)	0	18,424
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)	440,666	430
Treasury stock acquired, average cost (in USD per share)	$ 5.51	$ 6.07
2015 Share Repurchase Program | Common Stock
Class of Stock [Line Items]
Amount authorized to be repurchased					$ 5,000,000
Purchases of treasury stock (in shares)			706,858
Treasury stock acquired, average cost (in USD per share)			$ 5.72

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