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Stockholders' Equity - Common Stock Dividends and Buyback Program (Details) - USD ($) | 9 Months Ended | 82 Months Ended | 83 Months Ended | 100 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2022 | Mar. 31, 2022 | May 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares of common stock outstanding (in shares) | 33,719,621 |  | 33,719,621 | 33,719,621 | 33,719,621 |
Common stock dividends paid | $ 8,421,508 | $ 2,666,334 |  |  | $ 82,900,000 |
Cash dividends to common stockholders | 8,400,000 | 2,700,000 |  |  |  |
Common Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total cost of treasury shares acquired | $ 37,596 | $ 7,348 |  |  |  |
Average cost per share (in dollars per share) | $ 5.09 | $ 2.79 |  |  |  |
Common Stock | 2015 Share Repurchase Program |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Authorized amount to be repurchased |  |  |  |  |  | $ 5,000,000
Total cost of treasury shares acquired |  |  |  | $ 4,000,000 |  |
Treasury stock acquired (in shares) | 0 |  |  | 706,858 |  |
Average cost per share (in dollars per share) |  |  | $ 5.72 |  |  |

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