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Concentrations (Details Textual) - Customers | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Major Customers [Member] | Revenues [Member] | Continuing operations [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 56.00% | 94.00% | 7.00%
Number of major customers | 2 | 2 | 2
Major Customers [Member] | Revenues [Member] | Discontinued operations [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage |  | 96.00% | 61.00%
Number of major customers |  | 2 | 2
Major Suppliers [Member] | Purchases [Member] | Continuing operations [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 65.00% | 98.00% | 87.00%
Major Suppliers [Member] | Purchases [Member] | Discontinued operations [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage |  | 94.00% | 78.00%

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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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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
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