Unaudited Quarterly Results of Operations (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

The following tables set forth selected unaudited quarterly consolidated statement of operations data for each of the quarters indicated as well as the percentage of total revenue for each line item shown. The unaudited information should be read in conjunction with our financial statements and related notes included elsewhere in this report. We believe that the following unaudited information reflects all normal recurring adjustments necessary for a fair presentation of the information for the periods presented. The operating results for any quarter are not necessarily indicative of results for any future period.


	Three months ended
	Dec 31, 2017		Sep 30, 2017		Jun 30, 2017		Mar 31, 2017		Dec 31, 2016		Sep 30, 2016		Jun 30, 2016		Mar 31, 2016
	(in thousands)
Revenue
Subscription and support	$	45,549	$	43,214	$	40,980	$	39,540	$	38,329	$	36,237	$	34,969	$	33,585
Professional services	8,957		8,854		8,411		12,364		8,045		8,473		8,042		10,966
Total revenue	54,506		52,068		49,391		51,904		46,374		44,710		43,011		44,551
Cost of revenue
Subscription and support	8,779		8,472		7,758		7,637		7,244		6,694		7,039		6,918
Professional services	7,310		7,180		6,528		6,581		5,964		6,040		5,538		6,188
Total cost of revenue	16,089		15,652		14,286		14,218		13,208		12,734		12,577		13,106
Gross profit	38,417		36,416		35,105		37,686		33,166		31,976		30,434		31,445
Operating expenses
Research and development	18,870		17,527		16,239		15,536		14,533		14,342		14,047		14,516
Sales and marketing	21,949		23,712		19,787		18,713		18,196		22,354		19,828		20,088
General and administrative ⁽¹⁾	12,271		8,959		8,943		9,421		7,845		8,015		7,882		8,953
Total operating expenses	53,090		50,198		44,969		43,670		40,574		44,711		41,757		43,557
Loss from operations	(14,673)		(13,782)		(9,864)		(5,984)		(7,408)		(12,735)		(11,323)		(12,112)
Interest expense	(451)		(464)		(475)		(455)		(455)		(462)		(468)		(490)
Other income, net	797		198		176		612		348		298		278		576
Loss before (benefit) provision for income taxes	(14,327)		(14,048)		(10,163)		(5,827)		(7,515)		(12,899)		(11,513)		(12,026)
(Benefit) provision for income taxes	(6)		25		33		9		1		(8)		12		19
Net loss	$	(14,321)	$	(14,073)	$	(10,196)	$	(5,836)	$	(7,516)	$	(12,891)	$	(11,525)	$	(12,045)
Net loss per common share:
Basic and diluted	$	(0.34)	$	(0.34)	$	(0.25)	$	(0.14)	$	(0.18)	$	(0.32)	$	(0.28)	$	(0.30)
Weighted-average common shares outstanding - basic and diluted	42,108,764		41,815,139		41,429,691		41,108,611		40,872,772		40,762,960		40,593,908		40,451,668

(1) During the fourth quarter of 2017, we recorded an additional $1.9 million to general and administrative expense due to certain severance arrangements.