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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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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The price per share of the conversion feature embedded in the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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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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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Subsequent Event - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended
	Jul. 12, 2018	Mar. 06, 2018	Aug. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Subsequent Event [Line Items]
Common stock, shares issued				145,619,293	119,053,414
Principal amount				$ 129.2
Senior convertible notes due December 31, 2019
Subsequent Event [Line Items]
Conversion of notes to common shares, value		$ 1.3
Principal amount				$ 32.0
Senior notes, effective interest rate				9.75%
Common Stock \| Senior convertible notes due December 31, 2019
Subsequent Event [Line Items]
Conversion Option, shares		441,618
Deerfield \| Senior convertible notes due December 31, 2019
Subsequent Event [Line Items]
Principal amount				$ 120.0
Senior notes, effective interest rate				9.75%
Scenario Forecast \| Deerfield \| Facility Agreement Eighth Amendment \| Senior convertible notes due December 31, 2019 \| Tranche 4 Notes
Subsequent Event [Line Items]
Defer payment of principal amount			$ 3.0
Subsequent Event \| Deerfield \| Facility Agreement Eighth Amendment \| Senior convertible notes due December 31, 2019
Subsequent Event [Line Items]
Common stock, shares issued	7,367,839
Subsequent Event \| Deerfield \| Facility Agreement Eighth Amendment \| Senior convertible notes due December 31, 2019 \| Tranche 4 Notes \| Notes Due and Payable on December 31, 2019
Subsequent Event [Line Items]
Conversion of notes to common shares, value	$ 3.0
Principal amount	5.0
Subsequent Event \| Deerfield \| Facility Agreement Eighth Amendment \| 9.75% Senior Convertible Notes Due 2019 \| Tranche 4 Notes \| Notes Due and Payable on July 18, 2018
Subsequent Event [Line Items]
Conversion of notes to common shares, value	7.0
Principal amount	$ 10.0
Senior notes, effective interest rate	9.75%
Subsequent Event \| Deerfield \| Facility Agreement Eighth Amendment \| 8.75% Senior Convertible Notes Due 2019 \| Notes Due and Payable on December 31, 2019
Subsequent Event [Line Items]
Conversion of notes to common shares, value	$ 2.0
Principal amount	$ 2.0
Senior notes, effective interest rate	8.75%
Subsequent Event \| Deerfield \| Facility Agreement Eighth Amendment \| Common Stock \| Senior convertible notes due December 31, 2019 \| Maximum
Subsequent Event [Line Items]
Conversion price of shares	$ 2.01
Conversion Option, shares	5,750,000
Subsequent Event \| Deerfield \| Facility Agreement Eighth Amendment \| Common Stock \| Senior convertible notes due December 31, 2019 \| Minimum
Subsequent Event [Line Items]
Conversion price of shares	$ 1.80