Condensed Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Total revenue		$ 141,637	$ 121,660	$ 293,576	$ 233,995
Cost of revenue:
Total cost of revenue	[1]	49,005	44,556	106,985	83,506
Operating expenses:
Sales and marketing		16,920	15,631	33,995	28,859
General and administrative		17,359	13,872	38,224	33,084
Research and development		36,636	28,418	76,366	54,914
Amortization and depreciation		6,723	5,138	13,145	10,366
Total operating expenses		77,638	63,059	161,730	127,223
Operating income		14,994	14,045	24,861	23,266
Interest expense		(868)	(786)	(1,513)	(1,607)
Interest income		157	806	616	1,614
Other income, net		65	44	157	88
Income before income taxes		14,348	14,109	24,121	23,361
(Benefit from) / provision for income taxes		(2,277)	313	(1,075)	555
Net income		16,625		25,196	22,806
Net loss attributable to redeemable noncontrolling interest		370		606
Net income		$ 16,995	13,796	$ 25,802	22,806
Net income attributable to common stockholders			$ 13,796		$ 22,806
Net income per share:
Basic (in dollars per share)		$ 0.35	$ 0.29	$ 0.53	$ 0.47
Diluted (in dollars per share)		$ 0.34	$ 0.27	$ 0.51	$ 0.45
Weighted average common shares outstanding:
Basic (in shares)		48,792,280	48,388,696	48,758,922	48,281,068
Diluted (in shares)		50,551,632	50,283,990	50,443,526	50,244,384
SaaS and license
Revenue:
Total revenue		$ 95,704	$ 82,334	$ 187,654	$ 162,389
Cost of revenue:
Total cost of revenue	[1]	13,001	12,665	25,329	24,990
Hardware and other
Revenue:
Total revenue		45,933	39,326	105,922	71,606
Cost of revenue:
Total cost of revenue	[1]	$ 36,004	$ 31,891	$ 81,656	$ 58,516

[1] (1)Exclusive of amortization and depreciation shown in operating expenses below.