Conversion prorata percent on common stock outstanding at the option of the holder.

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Amount of deemed dividend related to the beneficial conversion feature on preferred stock.

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Represents the fair value of warrant liability.

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Exercise price per share or per unit of warrants or rights outstanding.

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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.

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Number of warrants or rights outstanding.

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

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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).

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

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

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- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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

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No definition available.

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Price of a single share of a number of saleable stocks of a company.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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Number of new stock issued during 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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CONVERTIBLE REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY - Preferred Stock & Warrants (Details) - USD ($)			1 Months Ended					9 Months Ended
	Oct. 23, 2017	Nov. 28, 2016	Jul. 31, 2017	Apr. 30, 2017	Sep. 30, 2016	Aug. 31, 2016	Apr. 30, 2016	Oct. 31, 2017	Jan. 31, 2017	Nov. 30, 2016
Equity
Conversion of convertible notes payable to common stock (in shares)		1,926,711
Series A convertible preferred stock, shares authorized								10,000,000	10,000,000
Series A convertible preferred stock, shares issued								1,515	1,515
Proceeds from warrant exercises								$ 615,000
Public Offering
Equity
Share price (in dollars per share)							$ 1.195
Number of shares of common stock subject to warrant (in shares)							1,952,000			31,499,725
Warrants exercise price (in dollars per share)							$ 1.20
Issuance of common stock (in shares)							3,600,000
Private Placement
Equity
Share price (in dollars per share)			$ 0.36	$ 0.78	$ 0.60	$ 0.65
Number of shares of common stock subject to warrant (in shares)				3,365,385	1,286,501
Warrants exercise price (in dollars per share)				$ 0.90	$ 0.75
Issuance of common stock (in shares)			5,500,000	6,410,258	1,550,000	2,423,077
Warrant \| Public Offering
Equity
Number of shares of common stock subject to warrant (in shares)										3,246,429
Warrants exercise price (in dollars per share)										$ 0.35
Warrants related to January 2014 agreement \| Warrant
Equity
Warrants outstanding								289,505
Warrants exercise price (in dollars per share)								$ 1.85
Warrants related to May 2014 agreement \| Warrant
Equity
Warrants outstanding								316,395
Warrants exercise price (in dollars per share)								$ 2.035
Warrants related to April to November 2014 financing \| Warrant
Equity
Warrants outstanding								1,661,055
Warrants exercise price (in dollars per share)								$ 3.70
Warrants related to June 2015 financing \| Warrant
Equity
Warrants outstanding								109,091
Warrants exercise price (in dollars per share)								$ 2.75
Warrants related to April 2016 financing \| Warrant
Equity
Warrants outstanding								1,952,000
Warrants exercise price (in dollars per share)								$ 1.20
Warrants related to September 2016 financing \| Warrant
Equity
Number of shares of common stock subject to warrant (in shares)					1,286,501
Warrants outstanding								1,286,501
Warrants exercise price (in dollars per share)					$ 0.75			$ 0.75
Dividend rate					0.00%
Risk-free rate					1.10%
Contractual term					5 years
Expected volatility					95.80%
Warrant liability					$ 566,000			$ 73,000
Warrants related to November 2016 financing \| Warrant
Equity
Warrants outstanding								30,406,061
Warrants exercise price (in dollars per share)								$ 0.35
Warrants related to November 2016 financing, tranche two \| Warrant
Equity
Warrants outstanding								895,450
Warrants exercise price (in dollars per share)								$ 0.44
Warrants related to November 2016 financing, tranche three \| Warrant
Equity
Warrants outstanding								198,214
Warrants exercise price (in dollars per share)								$ 0.33
Warrants related to April 2017 financing \| Warrant
Equity
Warrants outstanding								801,282
Warrants exercise price (in dollars per share)								$ 0.90
Warrants related to October 2017 financing \| Warrant
Equity
Number of shares of common stock subject to warrant (in shares)	2,564,103
Warrants outstanding								3,846,152
Warrants exercise price (in dollars per share)	$ 0.24							$ 0.30
Incremental fair value of warrants	$ 151,000
Dividend rate	0.00%
Risk-free rate	2.03%
Contractual term	5 years
Expected volatility	83.90%
Common Stock \| Warrants related to October 2017 financing \| Warrant
Equity
Warrants outstanding	3,846,152
Warrants exercise price (in dollars per share)	$ 0.30
Series A Convertible Preferred Stock
Equity
Series A convertible preferred stock, shares authorized										10,000
Series A convertible preferred stock, shares issued										1,515
Conversion of preferred stock percentage										19.99%
Deemed dividend related to the beneficial conversion feature								$ 100,000
Series A Convertible Preferred Stock \| Public Offering
Equity
Share price (in dollars per share)										$ 1,000