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Stock Warrants - Summary of all outstanding and exercisable warrants (Details) | 6 Months Ended
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Jun. 30, 2019 $ / shares shares
Exercise Price 1.38 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise Price | $ / shares | $ 1.38
Warrants Outstanding | 17,999,999
Warrants Exercisable | 17,999,999
Weighted Average Remaining Contractual Life (in years) | 4 years 3 months 15 days
Exercise Price 18.20 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise Price | $ / shares | $ 18.20
Warrants Outstanding | 714
Warrants Exercisable | 714
Weighted Average Remaining Contractual Life (in years) | 3 years 5 months 27 days
Exercise Price 50.05 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise Price | $ / shares | $ 50.05
Warrants Outstanding | 714,286
Warrants Exercisable | 714,286
Weighted Average Remaining Contractual Life (in years) | 1 year 4 months 21 days
Exercise Price 61.25 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise Price | $ / shares | $ 61.25
Warrants Outstanding | 200,852
Warrants Exercisable | 200,852
Weighted Average Remaining Contractual Life (in years) | 3 months 11 days
Exercise Price 3.85 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise Price | $ / shares | $ 3.85
Warrants Outstanding | 18,915,851
Warrants Exercisable | 18,915,851
Weighted Average Remaining Contractual Life (in years) | 4 years 1 month 21 days

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- Definition The value as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the share warrants plan. + References No definition available. + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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