Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue:
Subscription and support	$ 16,220	$ 14,023	$ 31,461	$ 28,345
Perpetual license	458	846	776	1,657
Total product revenue	16,678	14,869	32,237	30,002
Professional services	1,892	2,809	3,915	5,204
Total revenue	18,570	17,678	36,152	35,206
Cost of revenue:
Subscription and support	5,634	4,841	10,860	9,573
Professional services	1,106	1,732	2,730	3,640
Total cost of revenue	6,740	6,573	13,590	13,213
Gross profit	11,830	11,105	22,562	21,993
Operating expenses:
Sales and marketing	2,953	3,446	6,022	6,978
Research and development	4,054	4,152	7,964	8,078
Refundable Canadian tax credits	(116)	(122)	(225)	(243)
General and administrative	4,547	4,714	8,670	9,833
Depreciation and amortization	1,476	1,063	2,948	2,077
Acquisition-related expenses	1,380	360	3,808	905
Total operating expenses	14,294	13,613	29,187	27,628
Loss from operations	(2,464)	(2,508)	(6,625)	(5,635)
Interest expense, net	(662)	(576)	(1,223)	(923)
Other expense, net	(293)	(12)	(1,041)	(524)
Total other expense	(955)	(588)	(2,264)	(1,447)
Loss before provision for income taxes	(3,419)	(3,096)	(8,889)	(7,082)
(Provision for) benefit from income taxes	(158)	(238)	(261)	5
Net loss	(3,577)	(3,334)	(9,150)	(7,077)
Net loss attributable to common shareholders	$ (3,577)	$ (3,334)	$ (9,150)	$ (7,077)
Net loss per common share:
Net loss per common share, basic and diluted (in USD per share)	$ (0.22)	$ (0.22)	$ (0.58)	$ (0.48)
Weighted-average common shares outstanding, basic and diluted	16,269,808	14,867,947	15,851,106	14,854,139