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Shareholders' Equity - Summary of Warrant Activity (Details) - shares | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Equity [Abstract] |  |
Number of Warrants Outstanding Beginning Balance | 268,788,733 | 486,723
Number of Warrants Ratchet warrants issued due to price reset | 7,454,050 | 271,641,648
Number of Warrants Cashless warrant exercise | (111,244,318) | (3,270,888)
Number of Warrants exercise for cash |  | (68,750)
Number of Warrants Issuance of Series C Convertible Preferred Stock and warrants for cash in an offering | 47,302,176 |
Number of Warrants Issuance of Series C-1 Convertible Preferred Stock and warrants for cash and digital currency in an offering | 12,942,000 |
Number of Warrants Issuance of Series B Convertible Preferred Stock in exchange for convertible notes payable and warrants | (163,178,007) |
Number of Warrants Outstanding Ending Balance | 62,064,634 | 268,788,733

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- Definition Number of Warrants Issuance of Series B Convertible Preferred Stock in exchange for convertible notes payable and warrants. + References No definition available. + Details
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- Definition Number of Warrants Issuance of Series C-1 Convertible Preferred Stock and warrants for cash and digital currency in an offering. + References No definition available. + Details
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- Definition Number of Warrants Issuance of Series C Convertible Preferred Stock and warrants for cash in an offering. + References No definition available. + Details
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- Definition Number of Warrants ratchet warrants issued due to price reset. + References No definition available. + Details
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- Definition Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Cashless Exercise. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. + 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 (c)(1)(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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