Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Schedule of Allowance for Sales Credits

The following table shows the Company's allowance for sales credits and credit losses as follows:

	Beginning Balance		Additions		Deductions		Ending Balance
Year Ended December 31, 2018	$	226	$	1,845	$	(1,704)	$	367
Year Ended December 31, 2019	367		1,388		(1,216)		539
Year Ended December 31, 2020	$	539	$	2,789	$	(1,941)	$	1,387

Schedule of Useful Lives of Property and Equipment

The estimated useful lives of property and equipment are as follows:

Computer hardware and equipment	3 - 5 years
Purchased software and licenses	3 - 5 years
Furniture and fixtures	7 years
Leasehold improvements	Lesser of estimated useful life or lease term

Property and equipment consisted of the following:

	December 31,
	2020		2019
Computer hardware and equipment	$	51,570	$	40,887
Purchased software and licenses	10,219		11,509
Furniture and fixtures	7,396		6,811
Leasehold improvements	15,202		14,655
	84,387		73,862
Accumulated depreciation	(34,829)		(34,610)
Property and equipment, net	$	49,558	$	39,252

Schedule of Disaggregation of Revenue by Major Source

The following table disaggregates the Company's revenue by major source:

	Year Ended December 31,
	2020		2019		2018
Subscription	$	286,961	$	221,983	$	168,226
Transactional	55,580		48,396		39,232
Services and Other	60,210		45,105		33,642
Total Revenues	$	402,751	$	315,484	$	241,100

Schedule of Net Loss Per Share, Basic and Diluted

The following table sets forth the computations of net loss per share for the periods listed:

	Year ended December 31,
	2020		2019		2018
Numerator:
Net loss	$	(137,620)	$	(70,877)	$	(35,397)
Denominator:
Weighted-average common shares outstanding, basic and diluted	52,019		46,198		42,797
Net loss per common share, basic and diluted	$	(2.65)	$	(1.53)	$	(0.83)

Schedule of Antidilutive Securities Excluded from Computation of Loss Per Share

The following table sets forth the anti-dilutive common share equivalents for the periods listed:

	Year ended December 31,
	2020	2019	2018
Stock options, restricted stock units, and market stock units	2,797	3,805	5,372
Shares related to the 2023 Notes	298	887	—
Shares subject to warrants related to the issuance of the 2023 Notes	96	—	—
Shares related to the 2026 Notes	15	—	—
	3,206	4,692	5,372