Organization and Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($) Customer	Sep. 30, 2016 Customer	Sep. 30, 2017 USD ($) Customer	Sep. 30, 2016 Customer	Dec. 31, 2016 USD ($) Customer
Accounting Policies [Line Items]
Number of major customer represented stated percentage of total net revenue	0	0	0	1
Number of customers who accounted for more than 10% accounts receivable balance			0		0
Concentration Risk, Customer			No customer represented more than 10% of net revenue for either of the three or nine months ended September 30, 2017. No customer represented more than 10% of net revenue for the three months ended September 30, 2016 and one customer accounted for 10% of net revenue for the nine months ended September 30, 2016, respectively. No customer represented more than 10% of the Company’s accounts receivable balance at September 30, 2017 or December 31, 2016.
Capitalized software development costs | $	$ 500,000		$ 500,000		$ 0
Net revenue | Customer Concentration Risk
Accounting Policies [Line Items]
Percentage concentration risk		10.00%		10.00%