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v3.22.1

Stockholders' Equity - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2022 | Mar. 31, 2021 | Sep. 30, 2021
Class Of Stock [Line Items] |  |  |  |
Common stock shares issued upon conversion of preferred stock shares |  | 1,578,950 |  |
Preferred stock shares converted units | 315,790 | 315,790 |  |
Treasury Stock | 600,188 | 600,188 |  | 534,520
Repurchase of common stock |  | 65,668 | 33,926 |
Payment for repurchase of common stock |  | $ 2,100,000 | $ 400,000 |
ICG |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Common stock shares issued upon conversion of preferred stock shares | 1,299,510 |  |  |
Preferred stock shares converted units | 259,902 | 259,902 |  |
Series E Convertible Preferred Stock |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Preferred stock, outstanding |  |  |  | 47,840
Preferred stock, issued | 47,840 | 47,840 |  | 47,840
Series B Convertible Preferred Stock |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Preferred stock, outstanding | 0 | 0 |  | 315,790
Preferred stock, issued | 0 | 0 |  | 315,790

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