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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets and Liabilities Carried at Fair Value Measured on Recurring Basis

The following tables summarize the Company’s assets carried at fair value measured on a recurring basis at December 31, 2019 and 2018, respectively, by valuation hierarchy (in thousands):

		December 31, 2019
Description		Total Carrying Value				Quoted prices in active markets (Level 1)				Significant other observable inputs (Level 2)				Significant unobservable inputs (Level 3)
Assets:
Cash equivalents		$	19,976			$	19,976			$	—			$	—
		$	19,976			$	19,976			$	—			$	—

		December 31, 2018
Description		Total Carrying Value				Quoted prices in active markets (Level 1)				Significant other observable inputs (Level 2)				Significant unobservable inputs (Level 3)
Assets:
Cash equivalents		$	43,194			$	43,194			$	—			$	—
		$	43,194			$	43,194			$	—			$	—

Summary of Changes in the Fair Value of the Company's Derivative Liability

The following table sets forth a summary of changes in the fair value of the Company’s derivative liability for which fair value was determined by Level 3 inputs (in thousands):

		Second Tranche Transaction Liability				Additional Advance Warrant Liability				Second Tranche Warrants Liability				Total
Balance at June 30, 2018			—				—				19,780				19,780
Change in fair value			—				—				18,886				18,886
Reclassification to equity			—				—				(38,666	)			(38,666	)
Balance at December 31, 2018		$	—			$	—			$	—			$	—

Second Tranche Transaction Liability [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Schedule of Assumptions Used to Value Liability

Significant assumptions used to value this liability were as follows

		March 28, 2018 (Date of Issuance)				June 25, 2018 (Date of Settlement)
Volatility			54.20	%		N/A
Risk free interest rate			1.70	%		N/A
Estimated date of stockholder approval		June 2018				N/A
Estimated number of units issuable			26,900,000				20,184,224
Valuation date stock price		$	1.07			$	1.93

X

- Definition

Tabular disclosure of those significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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- Definition

Tabular disclosure of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) using recurring unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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-Name Accounting Standards Codification
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