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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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