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Concentrations - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017 Customer Vendor Supplier	Sep. 30, 2016 Customer Supplier	Sep. 30, 2017 Customer Vendor Supplier	Sep. 30, 2016 Customer Supplier	Dec. 31, 2016 Customer Vendor
Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Number of customers			4		3
Accounts Receivable | Customer Concentration Risk | Four Customers
Concentration Risk [Line Items]
Concentration risk, percentage			60.00%
Accounts Receivable | Customer Concentration Risk | Three Customers
Concentration Risk [Line Items]
Concentration risk, percentage					93.00%
Revenue | Customer Concentration Risk
Concentration Risk [Line Items]
Number of customers	3	3	4	4
Revenue | Customer Concentration Risk | Four Customers
Concentration Risk [Line Items]
Concentration risk, percentage			74.00%	97.00%
Revenue | Customer Concentration Risk | Three Customers
Concentration Risk [Line Items]
Concentration risk, percentage	64.00%	97.00%
Accounts Payables | Supplier Concentration Risk
Concentration Risk [Line Items]
Number of vendors | Vendor	2		2		1
Accounts Payables | Supplier Concentration Risk | Three Vendors
Concentration Risk [Line Items]
Concentration risk, percentage			33.00%
Accounts Payables | Supplier Concentration Risk | One Vendor
Concentration Risk [Line Items]
Concentration risk, percentage					35.00%
Cost of Goods Sold | Supplier Concentration Risk
Concentration Risk [Line Items]
Number of suppliers | Supplier	1	3	1	2
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 | Three Suppliers
Concentration Risk [Line Items]
Concentration risk, percentage		41.00%
Cost of Goods Sold | Supplier Concentration Risk | Two Suppliers
Concentration Risk [Line Items]
Concentration risk, percentage				35.00%

X

- Definition

Number of major customers.

+ References

No definition available.

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- Definition

Number of major suppliers.

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- Definition

Number of major vendors.

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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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