Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (Unaudited)

13. Selected Quarterly Financial Data (Unaudited)

Selected quarterly financial information for 2016 and 2015 is as follows:



	Quarter Ended
	Dec. 31, 2016			Sept. 30, 2016			Jun. 30, 2016			Mar. 31, 2016			Dec. 31, 2015			Sept. 30, 2015			Jun. 30, 2015			Mar. 31, 2015

	(unaudited, in thousands, except per share data)
Revenue	$	44,207		$	40,982		$	38,886		$	38,015		$	36,033		$	32,287		$	30,274		$	30,274
Cost of revenue ⁽¹⁾⁽²⁾	15,770			17,790			16,764			16,610			15,635			14,812			14,270			14,778
Gross profit	28,437			23,192			22,122			21,405			20,398			17,475			16,004			15,496
Operating expenses:
Research and development ⁽¹⁾⁽²⁾	6,236			6,041			5,799			5,802			5,580			5,473			5,568			6,038
Sales and marketing ⁽¹⁾⁽²⁾	14,480			12,925			12,637			12,706			10,720			10,797			10,594			9,931
General and administrative ⁽¹⁾⁽²⁾	6,511			6,143			5,882			6,536			6,433			6,087			6,027			7,275
Total operating expenses	27,227			25,109			24,318			25,044			22,733			22,357			22,189			23,244
Loss from operations	1,210			(1,917		)	(2,196		)	(3,639		)	(2,335		)	(4,882		)	(6,185		)	(7,748		)
Other income (expense), net:
Interest expense	(869		)	(961		)	(1,197		)	(1,199		)	(1,198		)	(1,235		)	(1,155		)	(1,139		)
Extinguishment of debt	—			(1,026		)	—			—			—			—			—			—
Interest income and other	54			12			(33		)	(45		)	28			119			(49		)	2
Total other income (expense), net	(815		)	(1,975		)	(1,230		)	(1,244		)	(1,170		)	(1,116		)	(1,204		)	(1,137		)
Income (loss) before income taxes	395			(3,892		)	(3,426		)	(4,883		)	(3,505		)	(5,998		)	(7,389		)	(8,885		)
Provision for (benefit from) income taxes	(14		)	(2		)	42			28			13			50			(20		)	18
Net income (loss)	$	409		$	(3,890	)	$	(3,468	)	$	(4,911	)	$	(3,518	)	$	(6,048	)	$	(7,369	)	$	(8,903	)
Net income (loss) per share:
Basic	$	0.01		$	(0.07	)	$	(0.07	)	$	(0.10	)	$	(0.07	)	$	(0.12	)	$	(0.15	)	$	(0.18	)
Diluted	$	0.01		$	(0.07	)	$	(0.07	)	$	(0.10	)	$	(0.07	)	$	(0.12	)	$	(0.15	)	$	(0.18	)
Shares used in computing net loss per share:
Basic	53,126			52,708			52,143			51,377			50,764			50,369			49,980			49,433
Diluted	56,633			52,708			52,143			51,377			50,764			50,369			49,980			49,433

(1) Included stock-based compensation as follows:



	Quarter Ended
	Dec. 31, 2016		Sept. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sept. 30, 2015		Jun. 30, 2015		Mar. 31, 2015

	(unaudited, in thousands)
Cost of revenue	$	424	$	357	$	329	$	265	$	227	$	233	$	218	$	188
Research and development	549		547		528		435		401		475		340		574
Sales and marketing	759		626		544		434		370		448		458		524
General and administrative	984		989		1,013		860		722		789		814		949
Total stock-based compensation	$	2,716	$	2,519	$	2,414	$	1,994	$	1,720	$	1,945	$	1,830	$	2,235

(2) Included depreciation and amortization expenses as follows:



	Quarter Ended
	Dec. 31, 2016		Sept. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sept. 30, 2015		Jun. 30, 2015		Mar. 31, 2015

	(unaudited, in thousands)
Cost of revenue	$	1,608	$	1,668	$	1,616	$	1,680	$	1,483	$	1,470	$	1,558	$	1,439
Research and development	224		204		161		148		140		126		102		87
Sales and marketing	58		56		54		53		54		52		51		49
General and administrative	196		212		229		222		186		192		199		200
Total depreciation and amortization	$	2,086	$	2,140	$	2,060	$	2,103	$	1,863	$	1,840	$	1,910	$	1,775