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Concentration of Credit Risk (Detail Textuals) - Customer concentration risk - Customer	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Revenue
Concentration Risk [Line Items]
Number of customers	2	1	2	1
Revenue | Customer one
Concentration Risk [Line Items]
Concentration risk percentage	50.30%	56.10%	53.90%	56.70%
Revenue | Customer two
Concentration Risk [Line Items]
Concentration risk percentage	22.50%		17.70%
Accounts receivable
Concentration Risk [Line Items]
Number of customers			2		2
Accounts receivable | Customer one
Concentration Risk [Line Items]
Concentration risk percentage			45.10%		56.60%
Accounts receivable | Customer two
Concentration Risk [Line Items]
Concentration risk percentage			37.70%		23.90%

X

- Definition

Represents number of major customers in concentration risk.

+ References

No definition available.

+ Details

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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
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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