Represents the class of warrants or rights for the exercisable period

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

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Expiration period covering the number of months after the date of issuance of warrants.

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Represents the fair value of warrant liability.

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Number of new stock issued during the period due to and exercise of warrants.

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No definition available.

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Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

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No definition available.

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Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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No definition available.

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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.

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Number of warrants or rights outstanding.

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- Definition

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

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

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

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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 PREFERRED STOCK AND STOCKHOLDERS’ EQUITY - Preferred Stock & Warrants (Details)			1 Months Ended		12 Months Ended
	Nov. 20, 2018 USD ($) $ / shares shares	Oct. 23, 2017 USD ($) $ / shares shares	Nov. 30, 2016 USD ($) $ / shares shares	Sep. 30, 2016 USD ($) $ / shares shares	Jan. 31, 2019 USD ($) $ / shares shares	Jan. 31, 2018 USD ($) shares	Nov. 24, 2017 $ / shares	Jul. 31, 2017 $ / shares	Apr. 30, 2017 $ / shares shares
Equity
Proceeds from warrant exercises to purchase common stock \| $					$ 10,546,000	$ 644,000
Series A convertible preferred stock, shares authorized					10,000,000	10,000,000
Series A convertible preferred stock, shares issued					0	0
Incremental fair value of warrants \| $					$ 874,000	$ 151,000
Private placement
Equity
Share price (in dollars per share) \| $ / shares								$ 0.36	$ 0.78
Warrants exercise price (in dollars per share) \| $ / shares									$ 0.90
Number of shares of common stock subject to warrant (in shares)									3,365,385
Warrant \| Public Offering
Equity
Warrants exercise price (in dollars per share) \| $ / shares			$ 0.35
Number of shares of common stock subject to warrant (in shares)			3,246,429
Warrant \| Series B Warrants
Equity
Warrants exercise price (in dollars per share) \| $ / shares	$ 0.25						$ 0.14
Issuance of common stock due to exercise of warrants (in shares)	26,666,666
Warrant \| New Warrants
Equity
Warrants exercise price (in dollars per share) \| $ / shares	$ 0.164
Warrants expiry after number of months from issuance	30 months
Warrants exercisable period after anniversary of issuance (in months)	6 months
Warrant \| New Warrants \| Maximum
Equity
Number of shares of common stock subject to warrant (in shares)	26,666,666
Warrants related to January 2014 agreement \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 1.85
Warrants outstanding					289,505
Warrants related to May 2014 agreement \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 2.035
Warrants outstanding					316,395
Warrants related to April to November 2014 financing \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 3.70
Warrants outstanding					1,661,055
Warrants related to June 2015 financing \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 2.75
Warrants outstanding					109,091
Warrants related to April 2016 financing \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 1.20
Warrants outstanding					1,952,000
Warrants related to September 2016 financing \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares				$ 0.75	$ 0.75
Warrant liability \| $				$ 566,000	$ 11,000
Number of shares of common stock subject to warrant (in shares)				1,286,501
Warrants outstanding					1,286,501
Warrants related to September 2016 financing \| Warrant \| Risk-free interest rate
Equity
Warrants, measurement input				1.1
Warrants related to September 2016 financing \| Warrant \| Contractual term
Equity
Warrants, contractual term				5 years
Warrants related to September 2016 financing \| Warrant \| Expected volatility
Equity
Warrants, measurement input				95.8
Warrants related to September 2016 financing \| Warrant \| Dividend rate
Equity
Warrants, measurement input				0
Warrants related to November 2016 financing \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 0.35
Warrants outstanding					30,406,061
Warrants related to November 2016 financing, tranche two \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 0.44
Warrants outstanding					895,450
Warrants related to November 2016 financing, tranche three \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 0.33
Warrants outstanding					198,214
Warrants related to April 2017 financing \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 0.90
Warrants outstanding					801,282
Warrants related to October 2017 financing \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares		$ 0.24			$ 0.30
Number of shares of common stock subject to warrant (in shares)		2,564,103
Warrants outstanding					3,846,152
Incremental fair value of warrants \| $		$ 151,000
Warrants related to October 2017 financing \| Warrant \| Risk-free interest rate
Equity
Warrants, measurement input		2.03
Warrants related to October 2017 financing \| Warrant \| Contractual term
Equity
Warrants, contractual term		5 years
Warrants related to October 2017 financing \| Warrant \| Expected volatility
Equity
Warrants, measurement input		83.9
Warrants related to October 2017 financing \| Warrant \| Dividend rate
Equity
Warrants, measurement input		0
Warrants related to November 2017 financing \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 0.20
Warrants outstanding					56,935,191
Warrants related to November 2017 financing, tranche two \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 0.25
Warrants outstanding					33,422,061
Incremental fair value of warrants \| $	$ 874,000
Warrants related to November 2017 financing, tranche two \| Warrant \| Risk-free interest rate
Equity
Warrants, measurement input	2.51
Warrants related to November 2017 financing, tranche two \| Warrant \| Contractual term
Equity
Warrants, contractual term	6 years
Warrants related to November 2017 financing, tranche two \| Warrant \| Expected volatility
Equity
Warrants, measurement input	78.4
Warrants related to November 2017 financing, tranche two \| Warrant \| Dividend rate
Equity
Warrants, measurement input	0
Warrants related To November 2018 financing \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares					$ 0.164
Warrants outstanding					26,666,666
Common Stock \| Warrants related to October 2017 financing \| Warrant
Equity
Warrants exercise price (in dollars per share) \| $ / shares		$ 0.30
Warrants outstanding		3,846,152
Series A convertible redeemable preferred stock \| Public Offering
Equity
Share price (in dollars per share) \| $ / shares			$ 1,000
Series A Convertible Preferred Stock
Equity
Series A convertible preferred stock, shares authorized			10,000
Series A convertible preferred stock, shares issued			1,515
Deemed dividend related to the beneficial conversion feature \| $			$ 100,000
Number of common shares into which a share is convertible						4,328,571