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Concentrations - Additional Information (Detail)			3 Months Ended		6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounts Receivable | Customer Concentration Risk | Three Customers
Concentration Risk [Line Items]
Concentration risk, percentage	89.00%
Accounts Receivable | Customer Concentration Risk | Four Customers
Concentration Risk [Line Items]
Concentration risk, percentage		89.00%
Revenue | Customer Concentration Risk | Three Customers
Concentration Risk [Line Items]
Concentration risk, percentage			62.00%		60.00%
Revenue | Customer Concentration Risk | Four Customers
Concentration Risk [Line Items]
Concentration risk, percentage				64.00%		65.00%
Accounts Payables | Supplier Concentration Risk | Three Vendors
Concentration Risk [Line Items]
Concentration risk, percentage	37.00%
Accounts Payables | Supplier Concentration Risk | One Vendor
Concentration Risk [Line Items]
Concentration risk, percentage		16.00%
Cost of Goods Sold | Supplier Concentration Risk | Two Supplier
Concentration Risk [Line Items]
Concentration risk, percentage			53.00%
Cost of Goods Sold | Supplier Concentration Risk | Three Suppliers
Concentration Risk [Line Items]
Concentration risk, percentage					64.00%
Cost of Goods Sold | Supplier Concentration Risk | One Supplier
Concentration Risk [Line Items]
Concentration risk, percentage				31.00%		34.00%

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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