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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Value of input used to measure derivative liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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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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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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Fair value portion of warrants not settleable in cash classified as equity.

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DERIVATIVE INSTRUMENTS, INCEPTION FAIR VALUE OF WARRANTS (Details) $ in Thousands	Dec. 31, 2019 USD ($)	Nov. 30, 2019 USD ($) shares	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($) Y
2018 Series B Warrant Exercise price
Fair value of warrants
Fair value of warrants	$ 0		$ 0	$ 11,500
2018 Series B Warrant Exercise price \| Underwritten Public Offering, June 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant expiration term (in years)				20 years
2018 Series A Warrant Exercise price
Fair value of warrants
Fair value of warrants				$ 13,700
2018 Series A Warrant Exercise price \| Underwritten Public Offering, June 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant expiration term (in years)				5 years
Placement Agent Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Number of shares into which a warrant may be converted \| shares		15,168
Fair value of warrants		$ 59
Warrant expiration term (in years)		5 years
Risk-free interest rate \| 2018 Series B Warrant Exercise price
Fair value of warrants
Derivative warrant liability measurement input				2.95
Risk-free interest rate \| 2018 Series A Warrant Exercise price
Fair value of warrants
Derivative warrant liability measurement input				2.75
Risk-free interest rate \| Placement Agent Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value assumptions		1.61
Expected dividend yield \| 2018 Series B Warrant Exercise price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value assumptions				0
Expected dividend yield \| 2018 Series A Warrant Exercise price
Fair value of warrants
Derivative warrant liability measurement input				0
Contractual term \| 2018 Series B Warrant Exercise price
Fair value of warrants
Derivative warrant liability measurement input \| Y				20
Contractual term \| 2018 Series A Warrant Exercise price
Fair value of warrants
Derivative warrant liability measurement input \| Y				5
Expected volatility \| 2018 Series B Warrant Exercise price
Fair value of warrants
Derivative warrant liability measurement input				202.51
Expected volatility \| 2018 Series A Warrant Exercise price
Fair value of warrants
Derivative warrant liability measurement input				202.51
Expected volatility \| Placement Agent Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value assumptions		100.82