Fair Value of Financial Instruments - Assumptions Used in Valuing Warrants (Detail)	9 Months Ended	12 Months Ended
Sep. 30, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Risk-free interest rate (as a percentage)	0.59%	1.06%
Expected dividend yield (as a percentage)	0.00%	0.00%
Expected term (in years)	1 year 2 months 1 day	1 year 11 months 1 day
Expected volatility (as a percentage)	87.59%	70.67%

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).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=36462937&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.

+ References

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- Definition

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

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No definition available.

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