Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue	$ 55,065	$ 37,144	$ 156,571	$ 104,705
Cost of revenue	16,673	12,083	48,044	33,577
Gross profit	38,392	25,061	108,527	71,128
Operating expenses:
Sales and marketing	8,709	5,299	23,680	14,955
Research and development	7,434	5,400	20,840	15,577
Refundable Canadian tax credits	(133)	(99)	(304)	(404)
General and administrative	12,196	8,011	34,232	23,475
Depreciation and amortization	6,427	3,606	17,430	9,589
Acquisition-related expenses	7,457	2,497	24,444	8,739
Total operating expenses	42,090	24,714	120,322	71,931
Loss from operations	(3,698)	347	(11,795)	(803)
Other expense:
Interest expense, net	(5,517)	(3,118)	(15,879)	(8,755)
Loss on debt extinguishment	(2,317)	0	(2,317)	0
Other expense, net	(228)	(744)	(1,681)	(965)
Total other expense	(8,062)	(3,862)	(19,877)	(9,720)
Loss before provision for income taxes	(11,760)	(3,515)	(31,672)	(10,523)
Benefit from (provision for) income taxes	(547)	(735)	6,166	(2,118)
Net loss	$ (12,307)	$ (4,250)	$ (25,506)	$ (12,641)
Earnings Per Share [Abstract]
Net loss per common share, basic and diluted (in dollars per share)	$ (0.50)	$ (0.21)	$ (1.13)	$ (0.63)
Weighted-average common shares outstanding, basic and diluted (in shares)	24,568,483	20,089,919	22,550,232	19,916,907
Total product revenue
Revenue	$ 52,034	$ 34,834	$ 146,964	$ 98,026
Subscription and support
Revenue	51,059	33,919	144,757	94,802
Cost of revenue	14,678	10,566	42,574	29,395
Perpetual license
Revenue	975	915	2,207	3,224
Professional services
Revenue	3,031	2,310	9,607	6,679
Cost of revenue	$ 1,995	$ 1,517	$ 5,470	$ 4,182