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Preferred Stock - Narrative (Details) - $ / shares | Mar. 31, 2020 | Jun. 30, 2019 | Oct. 02, 2017
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Class of Stock [Line Items] |  |  |
Preferred Stock, Shares Authorized (in shares) | 500,000 | 500,000 |
Preferred stock, par value (in US$ per share) | $ 1 | $ 1 |
Convertible Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Preferred Stock, Shares Authorized (in shares) | 21,000 |  |
Series A Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Preferred Stock, Shares Authorized (in shares) | 21,000,000 |  |
Preferred stock, par value (in US$ per share) | $ 1,091 |  |
Preferred stock, issued (in shares) | 14,700,000 |  | 14,700

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