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Fair Value Measurements - Schedule of warrant derivative liabilities (Details) - Integer	Jun. 30, 2020	Dec. 31, 2019
Expected Life [Member] | Strome Warrants [Member]
Warrants term	2 years 11 months 15 days	3 years 5 months 12 days
Expected Life [Member] | B. Riley Warrants [Member]
Warrants term	5 years 3 months 19 days	5 years 9 months 18 days
Measurement Input, Risk Free Interest Rate [Member] | Strome Warrants [Member]
Warrants measurement input	0.18	1.62
Measurement Input, Risk Free Interest Rate [Member] | B. Riley Warrants [Member]
Warrants measurement input	0.29	1.76
Volatility Factor [Member] | Strome Warrants [Member]
Warrants measurement input	138.50	144.54
Volatility Factor [Member] | B. Riley Warrants [Member]
Warrants measurement input	135.13	127.63
Dividend Rate [Member] | Strome Warrants [Member]
Warrants measurement input	0	0
Dividend Rate [Member] | B. Riley Warrants [Member]
Warrants measurement input	0	0
Transaction Date Closing Market [Member] | Strome Warrants [Member]
Warrants measurement input	0.65	0.80
Transaction Date Closing Market [Member] | B. Riley Warrants [Member]
Warrants measurement input	0.65	0.80
Exercise Price [Member] | Strome Warrants [Member]
Warrants measurement input	0.50	0.50
Exercise Price [Member] | B. Riley Warrants [Member]
Warrants measurement input	1.00	1.00

X

- 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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X

- 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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