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Stockholders' Equity - Common Stock Dividends and Buyback Program (Details) - USD ($) | 7 Months Ended | 9 Months Ended | 40 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2015 | Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | May 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares of common stock outstanding |  | 33,186,665 |  | 33,186,665 |
Cash dividends to common stockholders |  | $ 9,953,562 | $ 8,286,486 |  |
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
Value of shares repurchased | $ 1,609,008 | $ 138,638 | $ 395,550 |  |
Number of treasury shares acquired | 265,762 | 15,489 | 55,018 | 0 |
Average cost per share (in dollars per share) | $ 6.05 | $ 8.95 | $ 7.19 |  |

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