Summary of Significant Accounting Policies (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2019

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives of Propery and Equipment

The estimated useful lives for significant property and equipment categories are as follows:

Computer equipment and software	3 years
Furniture, fixtures, and equipment	3-5 years
Leasehold improvements and capital leases	Shorter of remaining lease term or estimated useful life

Net Revenue Disaggregated by Sales Channel and Geographic Region

Net Revenue by Category. The following table sets forth the Company’s net revenue disaggregated by sales channel and geographic region based on the billing addresses of its customers:

	Three Months Ended September 30, 2018 (in thousands)
	Direct		Wholesale		Managed SaaS		Total
North America	$	24,343	$	136	$	116	$	24,595
Other		77		—		—		77
Total net revenue	$	24,420	$	136	$	116	$	24,672

	Three Months Ended September 30, 2019 (in thousands)
	Direct		Wholesale		Managed SaaS		Total
North America	$	40,007	$	259	$	318	$	40,584
Other		19		—		—		19
Total net revenue	$	40,026	$	259	$	318	$	40,603

	Nine Months Ended September 30, 2018 (in thousands)
	Direct		Wholesale		Managed SaaS		Total
North America	$	49,498	$	3,668	$	184	$	53,350
Other		164		62		—		226
Total net revenue	$	49,662	$	3,730	$	184	$	53,576

	Nine Months Ended September 30, 2019 (in thousands)
	Direct		Wholesale		Managed SaaS		Total
North America	$	86,312	$	1,171	$	1,248	$	88,731
Other		86		—		—		86
Total net revenue	$	86,398	$	1,171	$	1,248	$	88,817

Net Revenue by Category: The following table sets forth the Company’s net revenue disaggregated by sales channel and geographic region based on the billing addresses of its customers:

	Direct		Year-Ended December 31, 2017
			Wholesale		Managed SaaS		Total
North America	$	35,356	$	491	$	—	$	35,847
Other		612		—		—		612
Total net revenue	$	35,968	$	491	$	—	$	36,459

	Direct		Year-Ended December 31, 2018
			Wholesale		Managed SaaS		Total
North America	$	68,884	$	3,666	$	496	$	73,046
Other		171		62		—		233
Total net revenue	$	69,055	$	3,728	$	496	$	73,279