Note 13 - Supplementary Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

Quarter ended:	Dec. 31, 2014			Sept. 30, 2014			June 30, 2014			March 31, 2014			Dec. 31, 2013			Sept. 30, 2013			June 30, 2013			March 31, 2013
Net revenue	$	25,499		$	18,726		$	17,724		$	16,189		$	22,239		$	16,828		$	19,560		$	15,967
Cost of revenue		11,679			7,935			7,848			7,303			9,202			7,651			8,442			7,417
Gross profit		13,820			10,791			9,876			8,886			13,037			9,177			11,118			8,550
Operating expenses:
Sales and marketing		9,356			7,805			7,754			7,331			7,804			6,554			7,170			6,456
Research and development		2,649			2,628			2,622			2,644			2,438			2,440			2,217			2,121
General and administrative		3,407			2,897			2,335			2,564			3,135			2,160			2,354			2,289
Total operating expenses		15,412			13,330			12,711			12,539			13,377			11,154			11,741			10,866
Income (loss) from operations		(1,592	)		(2,539	)		(2,835	)		(3,653	)		(340	)		(1,977	)		(623	)		(2,316	)
Interest and other income, net		8			—			138			80			105			140			75			135
Income (loss) before income taxes		(1,584	)		(2,539	)		(2,697	)		(3,573	)		(235	)		(1,837	)		(548	)		(2,181	)
Income tax provision (benefit)		41			97			44			37			43			(169	)		90			(18	)
Net income (loss)	$	(1,625	)	$	(2,636	)	$	(2,741	)	$	(3,610	)	$	(278	)	$	(1,668	)	$	(638	)	$	(2,163	)
Net income (loss) per share—basic	$	(0.11	)	$	(0.18	)	$	(0.19	)	$	(0.26	)	$	(0.02	)	$	(0.11	)	$	(0.04	)	$	(0.15	)
Net income (loss) per share—diluted	$	(0.11	)	$	(0.18	)	$	(0.19	)	$	(0.26	)	$	(0.02	)	$	(0.11	)	$	(0.04	)	$	(0.15	)
Weighted average number of shares used in per share calculations:
Basic		14,425			14,334			14,231			14,021			14,016			14,541			14,723			14,408
Diluted		14,425			14,334			14,231			14,021			14,016			14,541			14,723			14,408