Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue:
Subscription and support	$ 19,407	$ 16,220	$ 37,542	$ 31,461
Perpetual license	1,746	458	2,440	776
Total product revenue	21,153	16,678	39,982	32,237
Professional services	2,128	1,892	4,051	3,915
Total revenue	23,281	18,570	44,033	36,152
Cost of revenue:
Subscription and support	6,676	5,634	12,569	10,860
Professional services	1,327	1,106	2,462	2,730
Total cost of revenue	8,003	6,740	15,031	13,590
Gross profit	15,278	11,830	29,002	22,562
Operating expenses:
Sales and marketing	4,037	2,953	7,258	6,022
Research and development	4,003	4,054	7,480	7,964
Refundable Canadian tax credits	(112)	(116)	(229)	(225)
General and administrative	6,576	4,547	12,480	8,670
Depreciation and amortization	1,299	1,476	2,463	2,948
Acquisition-related expenses	2,278	1,380	5,969	3,808
Total operating expenses	18,081	14,294	35,421	29,187
Loss from operations	(2,803)	(2,464)	(6,419)	(6,625)
Interest expense, net	(1,160)	(662)	(2,095)	(1,223)
Loss on debt extinguishment	(1,634)	0	(1,634)	0
Other expense, net	(18)	(293)	(130)	(1,041)
Total other expense	(2,812)	(955)	(3,859)	(2,264)
Loss before provision for income taxes	(5,615)	(3,419)	(10,278)	(8,889)
Provision for income taxes	(196)	(158)	(1,147)	(261)
Net loss	$ (5,811)	$ (3,577)	$ (11,425)	$ (9,150)
Net loss per common share:
Net loss per common share, basic and diluted (in USD per share)	$ (0.33)	$ (0.22)	$ (0.66)	$ (0.58)
Weighted-average common shares outstanding, basic and diluted (in shares)	17,778,184	16,269,808	17,374,789	15,851,106