Fair value of financial instruments.

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- Definition

Fair value of liability, percentage decrease.

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Fair value of liability percentage decrease if probabilities of meeting milestones percentage decrease.

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- Definition

Number of warrant holders.

+ References

No definition available.

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Probabilities of meeting milestones, percentage decrease.

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- Definition

Warrants issues fair value.

+ References

No definition available.

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- Definition

Number of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

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- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

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Description of the inputs and valuation technique(s) used to measure fair value.

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- Definition

Fair value of financial and nonfinancial obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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- Definition

Amount of long-term debt classified as other, payable after one year or the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Fair Value of Financial Instruments - Additional Information (Detail) $ in Millions			9 Months Ended	12 Months Ended
	Sep. 29, 2017 WarrantHolder shares	Sep. 29, 2017 shares WarrantHolder	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	May 12, 2016 USD ($)
Fair Value of Financial Instruments [Line Items]
Cash equivalents, money market funds			$ 18.4	$ 20.5
Warrants issued, fair value					$ 12.8
Number of warrant holders \| shares		4
Fair value of the liability, percentage decrease			7.00%
Minimum
Fair Value of Financial Instruments [Line Items]
Probabilities of meeting the milestones, percentage decrease			5.00%
Fair value of the liability, percentage decrease			16.00%
Maximum
Fair Value of Financial Instruments [Line Items]
Probabilities of meeting the milestones, percentage decrease			10.00%
Fair value of the liability, percentage decrease			30.00%
Milestone Rights Liability \| Deerfield
Fair Value of Financial Instruments [Line Items]
Long term liability			$ 8.9
Milestone Rights Liability \| Senior convertible notes due December 31, 2019 \| Deerfield
Fair Value of Financial Instruments [Line Items]
Long term liability			7.2	8.9
Warrant Liability
Fair Value of Financial Instruments [Line Items]
Fair value of warrants liability				$ 7.4
Valuation technique				Monte Carlo valuation pricing model
Fair value assumption, risk-free rate				1.14%
Warrant liability fair value assumptions, dividend yield				0.00%
Warrant liability fair value assumptions, remaining term				1 year 4 months 25 days
Fair value assumption, stock price volatility				118.00%
Fair Value, Inputs, Level 3 \| Milestone Rights Liability
Fair Value of Financial Instruments [Line Items]
Fair value of warrants liability			$ 18.7
Fair Value, Inputs, Level 3 \| Market Approach Valuation Technique \| 5.75% Senior convertible notes due August 15, 2018 \| Senior Convertible Notes
Fair Value of Financial Instruments [Line Items]
Fair value assumption, risk-free rate			20.00%
Fair value assumption, stock price volatility			107.00%
Fair Value, Inputs, Level 3 \| Income Approach Valuation Technique \| Senior convertible notes due December 31, 2019
Fair Value of Financial Instruments [Line Items]
Market discount rate			12.00%
Fair Value, Inputs, Level 3 \| Income Approach Valuation Technique \| Milestone Rights Liability
Fair Value of Financial Instruments [Line Items]
Market discount rate			14.00%
Warrant Exchange Agreement
Fair Value of Financial Instruments [Line Items]
Number of warrant holders \| WarrantHolder	4	4
Outstanding warrants \| shares	9,700,000	9,700,000