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Borrowings - August 2019 Exchange Agreement - Additional Information (Detail) - USD ($) $ in Millions | Aug. 06, 2019 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Common stock, shares issued |  | 211,787,573 | 187,029,967
2019 Notes Tranche 1 | Deerfield |  |  |
Debt Instrument [Line Items] |  |  |
Repayments of aggregate principal amount | $ 2.0 |  |
Common stock, shares issued | 2,678,571 |  |
Exchange in aggregate principal amount | $ 3.0 |  |

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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