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.

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The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

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Borrowings - August 2019 Exchange Agreement - Additional Information (Detail) - USD ($) $ in Millions	Aug. 06, 2019	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Common stock, shares issued		206,407,551	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