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Equity - June 2020 Sobi Stock Purchase (Narrative) (Details) - SOBI Purchase Agreement - USD ($) $ / shares in Units, $ in Millions | Jul. 28, 2020 | Jun. 11, 2020
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Class of Stock [Line Items] |  |
Sale of stock, number of shares issued in transaction (in shares) |  | 180,546
Share price (in dollars per share) |  | $ 138.4680
Sale of stock, percentage of ten-day volume weighted average price of common stock |  | 120.00%
Total aggregate purchase price |  | $ 25.0
Redemption premium | $ 14.5 |

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