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Concentrations (Details Textual) - Customers	12 Months Ended
	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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Number of customers.

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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.

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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
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-Name Accounting Standards Codification
-Topic 275
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