Nature of Business and Summary of Significant Accounting Policies - Summary of Company's Customers Accounts Receivable (Detail) - Customer Concentration Risk [Member] - Accounts Receivable [Member]	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accounts Receivable	92.00%	89.00%
Customer A [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accounts Receivable	36.00%	40.00%
Customer B [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accounts Receivable	28.00%	33.00%
Customer C [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accounts Receivable	28.00%	16.00%