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- Definition

Amount of gain (loss) recognized in other comprehensive income (OCI) from liability measured at fair value on recurring basis using unobservable input (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
-Subparagraph (c)(1a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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Fair Value Measurements - Estimated Fair Value of Warrant Liability (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 USD ($) $ / shares	Jul. 31, 2019 $ / shares	Jul. 23, 2019 USD ($)
Recurring \| Level 3
Fair Value Assumptions and Methodology for Assets and Liabilities
Fair value of warrant	$ 2,000	$ 3,000
Change in fair value	$ (1,000)
Series A Warrants \| Stock price
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability \| $ / shares	0.53	0.65
Series A Warrants \| Strike price
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability \| $ / shares	787.50	787.50
Series A Warrants \| Expected life
Fair Value Assumptions and Methodology for Assets and Liabilities
Weighted-average expected term (years)	2 years 2 months 12 days	2 years 4 months 28 days
Series A Warrants \| Volatility
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability	141.60	143.41
Series A Warrants \| Risk free rate
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability	0.29	1.62
Series 1 warrants
Fair Value Assumptions and Methodology for Assets and Liabilities
Weighted-average expected term (years)			5 years
Series 1 warrants \| Stock price
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability \| $ / shares			1.73
Series 1 warrants \| Strike price
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability \| $ / shares			2.00
Series 1 warrants \| Expected life
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability			5.0
Series 1 warrants \| Volatility
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability			109.25
Series 1 warrants \| Risk free rate
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability			1.83
Underwriter Warrants \| Stock price
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability \| $ / shares	0.53	0.65
Underwriter Warrants \| Strike price
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability \| $ / shares	52.50	52.50
Underwriter Warrants \| Expected life
Fair Value Assumptions and Methodology for Assets and Liabilities
Weighted-average expected term (years)	3 years 6 months	3 years 9 months 4 days
Underwriter Warrants \| Volatility
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability	141.60	143.41
Underwriter Warrants \| Risk free rate
Fair Value Assumptions and Methodology for Assets and Liabilities
Warrant liability	0.29	1.69
2019 Bridge Note Warrants
Fair Value Assumptions and Methodology for Assets and Liabilities
Fair value of warrant				$ 4,259,000
Warrant liability \| Series A Warrants
Fair Value Assumptions and Methodology for Assets and Liabilities
Fair value of warrant	$ 3
Warrant liability		10
Change in fair value	7
Warrant liability \| Series A Warrants \| Recurring \| Level 3
Fair Value Assumptions and Methodology for Assets and Liabilities
Fair value of warrant	3	$ 10
Warrant liability \| Underwriter Warrants
Fair Value Assumptions and Methodology for Assets and Liabilities
Fair value of warrant	2,096	3,482
Change in fair value	1,386
Warrant liability \| Underwriter Warrants \| Recurring \| Level 3
Fair Value Assumptions and Methodology for Assets and Liabilities
Fair value of warrant	$ 2,096	3,482
Warrant liability \| LOC Warrants \| Recurring \| Level 3
Fair Value Assumptions and Methodology for Assets and Liabilities
Fair value of warrant		0
Warrant liability \| 2019 Bridge Note Warrants \| Recurring \| Level 3
Fair Value Assumptions and Methodology for Assets and Liabilities
Fair value of warrant		$ 0