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Outstanding Debt - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	Jun. 06, 2019	May 05, 2020
Debt Instrument [Line Items]
Debt instrument, warrants price per unit		$ 10.00
Series E Preferred Stock and Related Warrants [Member]
Debt Instrument [Line Items]
Debt instrument, warrants price per unit	$ 1,500
Senior Secured Promissory Notes [Member]
Debt Instrument [Line Items]
Debt instrument, principal face amount	$ 2.0
Debt instrument maturity date	Jul. 16, 2021
Interest rate	8.00%
Series D Warrants [Member]
Debt Instrument [Line Items]
Number of common shares issuable on cancellation of warrants	5,605
Pre-Funded Series D Warrants [Member]
Debt Instrument [Line Items]
Number of common shares issuable on cancellation of warrants	100,000

X

- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

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Period Type:	instant

X

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
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X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

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.

+ References

No definition available.

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X

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
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-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
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- Details

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