Changes In Equity And Comprehensive Income Line Items [Line Items]

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- Definition

Exercise price per share or per unit 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)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ 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)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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- Definition

Face amount or stated value per share of common stock.

+ References

+ Details

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

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- Definition

Number of shares issued for each share of convertible preferred stock that is converted.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

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-Publisher FASB
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-Topic 210
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-Section S99
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-Subparagraph (SX 210.5-02(27))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount of expense (income) related to adjustment to fair value of warrant liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section 25
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6939902&loc=d3e20148-110875

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- Definition

Value of the difference between preference in liquidation and the par or stated values of the preferred shares.

+ References

No definition available.

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- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The cash inflow associated with the amount received from holders exercising their stock warrants.

+ References

No definition available.

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- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

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- Definition

Number of new stock issued during the period.

+ 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(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Per share amount of par value or stated value of stock classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable.

+ References

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Securities Purchase Agreement - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Mar. 26, 2015	Sep. 08, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Nov. 17, 2014	Nov. 16, 2014
Changes In Equity And Comprehensive Income Line Items [Line Items]
Common stock par value per share			$ 0.001	$ 0.001
Aggregate gross proceeds from the issuance of Series C preferred stock and common stock			$ 0	$ 0	$ 14,163
Change in fair value of warrant liability			0	0	3,280
Proceeds from the exercise of warrants			$ 0	$ 8,644	$ 0
Common stock shares reserved for issuance			46,512,010	44,841,572
Common stock, shares authorized			150,000,000	150,000,000		100,000,000	50,000,000
Series C Preferred Stock
Changes In Equity And Comprehensive Income Line Items [Line Items]
Number of shares sold		87,196
Convertible preferred stock par value per share		$ 0.001
Price per share		$ 17.50
Aggregate gross proceeds from the issuance of Series C preferred stock and common stock		$ 14,400
Series C Preferred Stock, shares issued upon conversion into common stock						10
Beneficial conversion feature		$ 400
Series C Convertible Preferred Stock
Changes In Equity And Comprehensive Income Line Items [Line Items]
Common stock shares reserved for issuance		871,960
Common Stock
Changes In Equity And Comprehensive Income Line Items [Line Items]
Number of shares sold		7,363,334		2,158,000	7,363,000
Common stock par value per share		$ 0.001
Price per share		$ 1.75
Common stock warrants outstanding
Changes In Equity And Comprehensive Income Line Items [Line Items]
Warrants to purchase common stock sold (shares)		4,117,647
Exercise price per share		$ 2.26
2014 Warrant
Changes In Equity And Comprehensive Income Line Items [Line Items]
Proceeds from the exercise of warrants	$ 8,600
2014 Warrant \| Common stock warrants outstanding
Changes In Equity And Comprehensive Income Line Items [Line Items]
Number of shares sold	3,824,600
Exercise price per share		$ 2.26
2015 Warrant
Changes In Equity And Comprehensive Income Line Items [Line Items]
Change in fair value of warrant liability				$ 3,500
2015 Warrant \| Common stock warrants outstanding
Changes In Equity And Comprehensive Income Line Items [Line Items]
Warrants to purchase common stock sold (shares)	1,593,583
Exercise price per share	$ 5.50