Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Total revenue	$ 198,968	$ 151,798
Cost of revenues:
Total cost of revenues	38,285	29,578
Gross profit	160,683	122,220
Operating expenses:
Research and development	46,202	35,177
Sales and marketing	102,328	74,905
General and administrative	26,255	21,174
Total operating expenses	174,785	131,256
Loss from operations	(14,102)	(9,036)
Other expense:
Interest income	4,057	4,174
Interest expense	(5,953)	(5,513)
Other expense	(1,052)	(12)
Total other expense	(2,948)	(1,351)
Loss before income tax expense	(17,050)	(10,387)
Income tax expense	(666)	(713)
Net loss	$ (17,716)	$ (11,100)
Net loss per share, basic and diluted	$ (0.41)	$ (0.27)
Weighted average common shares used in computing basic and diluted net loss per share:	43,275	40,568
Subscription [Member]
Revenues:
Total revenue	$ 191,229	$ 144,226
Cost of revenues:
Total cost of revenues	29,734	21,301
Professional Services and Other [Member]
Revenues:
Total revenue	7,739	7,572
Cost of revenues:
Total cost of revenues	$ 8,551	$ 8,277