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Property and equipment (Schedule of Impairement Charge) (Details) | 3 Months Ended
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Mar. 31, 2018 USD ($)
Property, Plant and Equipment [Line Items] |
Impairment charge | $ 11,480,491
Prive Miners [Member] |
Property, Plant and Equipment [Line Items] |
Impairment charge | 10,677,603
BMSS Miners [Member] |
Property, Plant and Equipment [Line Items] |
Impairment charge | 406,652
Kairos Miners [Member] |
Property, Plant and Equipment [Line Items] |
Impairment charge | $ 396,236

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- Definition For the asset that is reclassified back to held and used from held-for-sale, the amount of impairment charge that is recognized on the reclassification date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 35 -Paragraph 44 -URI http://asc.fasb.org/extlink&oid=29634951&loc=d3e1756-110224 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2459-110228 + Details
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Balance Type: | debit
Period Type: | duration

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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. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
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