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Concentrations - Additional Information (Detail)			3 Months Ended		9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accounts Receivable | Customer Concentration Risk | Three Customers
Concentration Risk [Line Items]
Concentration risk, percentage	74.00%	49.00%
Revenue | Customer Concentration Risk | Three Customers
Concentration Risk [Line Items]
Concentration risk, percentage				64.00%	55.00%
Revenue | Customer Concentration Risk | Five Customers
Concentration Risk [Line Items]
Concentration risk, percentage			82.00%
Revenue | Customer Concentration Risk | Four Customers
Concentration Risk [Line Items]
Concentration risk, percentage						74.00%
Accounts Payables | Supplier Concentration Risk | One Vendor
Concentration Risk [Line Items]
Concentration risk, percentage	18.00%
Accounts Payables | Supplier Concentration Risk | Two Vendors
Concentration Risk [Line Items]
Concentration risk, percentage		28.00%
Cost of Goods Sold | Supplier Concentration Risk | Three Suppliers
Concentration Risk [Line Items]
Concentration risk, percentage			58.00%
Cost of Goods Sold | Supplier Concentration Risk | One Supplier
Concentration Risk [Line Items]
Concentration risk, percentage				56.00%		53.00%
Cost of Goods Sold | Supplier Concentration Risk | Two Suppliers
Concentration Risk [Line Items]
Concentration risk, percentage					44.00%

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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.

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

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