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Concentrations (Details Textual) - Customers | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Customer Concentration Risk I | Continuing operations [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 21.00% | 16.00% | 44.00%
Number of major customers | 2 | 2 | 2
Customer Concentration Risk I | Discontinued Operations [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage |  |  | 12.00%
Number of major customers |  |  | 2
Customer Concentration Risk II | Continuing operations [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 15.00% | 13.00% |
Number of major customers | 2 | 2 |
Supplier Concentration Risk I | Continuing operations [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 100.00% | 31.00% | 40.00%
Number of major customers | 1 | 2 | 2
Supplier Concentration Risk I | Discontinued Operations [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage |  |  | 23.00%
Number of major customers |  |  | 2
Supplier Concentration Risk II | Continuing operations [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage |  | 17.00% |
Number of major customers |  | 2 |

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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=118260190&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=118260190&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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