Significant Accounting Policies - Schedule of Risk Percentage (Detail) - Customer concentration risk [Member]	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Customer A [Member] | Sales revenue, net [Member]
Concentration Risk [Line Items]
Customers accounted for percentage of company's total revenues and accounts receivable	34.00%	34.00%	31.00%	27.00%
Customer A [Member] | Accounts receivable [Member]
Concentration Risk [Line Items]
Customers accounted for percentage of company's total revenues and accounts receivable			35.00%		32.00%
Customer B [Member] | Sales revenue, net [Member]
Concentration Risk [Line Items]
Customers accounted for percentage of company's total revenues and accounts receivable	5.00%	11.00%	8.00%	8.00%
Customer B [Member] | Accounts receivable [Member]
Concentration Risk [Line Items]
Customers accounted for percentage of company's total revenues and accounts receivable			4.00%		29.00%
Customer C [Member] | Accounts receivable [Member]
Concentration Risk [Line Items]
Customers accounted for percentage of company's total revenues and accounts receivable					12.00%
Customer D [Member] | Accounts receivable [Member]
Concentration Risk [Line Items]
Customers accounted for percentage of company's total revenues and accounts receivable			13.00%