Note 16 - Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Information [Text Block]

16.           Quarterly Financial Data (Unaudited)

	Three months ended
	March 31, 2011			June 30, 2011			September 30, 2011			December 31, 2011
Revenue	$	44,468		$	51,628		$	52,962		$	47,461
Cost of revenue *		22,163			25,070			25,148			22,544
Gross profit		22,305			26,558			27,814			24,917
Operating expenses:
Research and development *		10,086			11,237			11,792			11,403
Selling, general and administrative *		9,490			10,343			10,249			10,198
Litigation		813			939			722			905
Total operating expenses		20,389			22,519			22,763			22,506
Income from operations		1,916			4,039			5,051			2,411
Other income (expense):
Interest and other income		271			160			103			137
Interest and other expense		(88	)		(136	)		(100	)		(38	)
Total other income, net		183			24			3			99
Income before income taxes		2,099			4,063			5,054			2,510
Income tax provision / (benefit)		206			581			(419	)		57
Net income	$	1,893		$	3,482		$	5,473		$	2,453
Basic net income per share	$	0.05		$	0.10		$	0.16		$	0.07
Diluted net income per share	$	0.05		$	0.10		$	0.16		$	0.07
Weighted average common shares outstanding:
Basic		35,024			33,846			33,594			33,759
Stock options		1,081			1,057			646			615
Diluted		36,105			34,903			34,240			34,374
* Stock-based compensation has been included in the following line items:
Cost of revenue	$	63		$	89		$	83		$	77
Research and development		1,427			1,550			1,576			1,356
Selling, general and administrative		1,497			2,036			1,715			1,657
Total	$	2,987		$	3,675		$	3,374		$	3,090

	Three months ended
	March 31, 2010		June 30, 2010			September 30, 2010			December 31, 2010
Revenue	$	50,250	$	55,690		$	65,843		$	47,057
Cost of revenue*		20,954		23,256			29,857			23,316
Gross profit		29,296		32,434			35,986			23,741
Operating expenses:
Research and development*		11,040		11,785			11,291			10,256
Selling, general and administrative*		10,393		11,615			10,296			8,865
Litigation		1,567		2,228			964			659
Total operating expenses		23,000		25,628			22,551			19,780
Income from operations		6,296		6,806			13,435			3,961
Other income (expense):
Interest and other income		347		338			240			231
Interest and other expense		-		(4	)		(159	)		(71	)
Total other income, net		347		334			81			160
Income before income taxes		6,643		7,140			13,516			4,121
Income tax provision		287		733			297			540
Net income	$	6,356	$	6,407		$	13,219		$	3,581
Basic net income per share	$	0.18	$	0.18		$	0.37		$	0.10
Diluted net income per share	$	0.17	$	0.17		$	0.35		$	0.10
Weighted average common shares outstanding		35,421		36,291			36,185			35,420
Stock options and restricted stock		2,362		2,064			1,542			1,309
Diluted weighted-average common equivalent shares outstanding		37,783		38,355			37,727			36,729
* Stock-based compensation has been included in the following line items:
Cost of revenue	$	79	$	116		$	70		$	128
Research and development		1,735		1,995			1,647			1,365
Selling, general and administrative		2,210		3,428			2,445			1,592
Total	$	4,024	$	5,539		$	4,162		$	3,085