Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Organization and Summary of Significant Accounting Policies [Abstract]

Summary of allowance for doubtful accounts

The following table summarizes the allowance for doubtful accounts as of December 31, 2012, 2011 and 2010 (in thousands):

	Balance at Beginning of Period		Adjustments to Costs and Expenses			Write- offs			Balance at End of Period
Allowance for doubtful accounts:
Year ended December 31, 2010	$	9	$	34		$	—		$	43
Year ended December 31, 2011	$	43	$	(16	)	$	(7	)	$	20
Year ended December 31, 2012	$	20	$	(18	)	$	—		$	2

Summary of cash, cash equivalents and investments

At December 31, 2012 and 2011, the fair value of cash, cash equivalents and investments was $56.3 million and $53.0 million, respectively.  The following is a summary of cash, cash equivalents and investments at December 31, 2012 and 2011 (in thousands):

	For the Year Ended December 31, 2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash	$	11,116	$	—	$	—		$	11,116
Money market fund		17,235		—		—			17,235
Certificates of deposit		1,880		—		(1	)		1,879
Commercial paper		5,745		1		(1	)		5,745
Corporate notes and bonds		20,172		7		(6	)		20,173
U.S. government agency securities		202		—		—			202
	$	56,350	$	8	$	(8	)	$	56,350
Classified as:
Cash and cash equivalents	$	30,853	$	—	$	(1	)	$	30,852
Short-term investments		25,497		8		(7	)		25,498
	$	56,350	$	8	$	(8	)	$	56,350

	For the Year Ended December 31, 2011
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash	$	6,461	$	—	$	—		$	6,461
Money market fund		15,698		—		—			15,698
Certificates of deposit		480		—		—			480
Commercial paper		6,295		—		(6	)		6,289
Corporate notes and bonds		15,283		1		(16	)		15,268
U.S. government agency securities		7,707		—		(1	)		7,706
Auction-rate security		1,400		—		(289	)		1,111
	$	53,324	$	1	$	(312	)	$	53,013
Classified as:
Cash and cash equivalents	$	22,159	$	—	$	—		$	22,159
Short-term investments		29,765		1		(23	)		29,743
Long-term investment		1,400		—		(289	)		1,111
	$	53,324	$	1	$	(312	)	$	53,013

Summary of estimated fair value of available-for-sale securities classified by the stated maturity date

The following table summarizes the estimated fair value of our available-for-sale securities classified by the stated maturity date of the security (in thousands):

	December 31,
	2012		2011
Due within one year	$	23,885	$	29,503
Due within two years		1,613		240
Due after two years		—		1,111
	$	25,498	$	30,854

Summary of unrealized losses on of available-for-sale investments

The following table sets forth the unrealized losses for the Company's available-for-sale investments as of December 31, 2012 and 2011 (in thousands):

As of December 31, 2012	In Loss Position Less Than 12 Months					In Loss Position More Than 12 Months					Total In Loss Position
Description	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Certificate of deposits	$	1,159	$	(1	)	$	—	$	—		$	1,159	$	(1	)
Commercial paper		3,498		(1	)		—		—			3,498		(1	)
Corporate notes and bonds		12,045		(4	)		1,613		(2	)		13,658		(6	)
Total	$	16,702	$	(6	)	$	1,613	$	(2	)	$	18,315	$	(8	)

As of December 31, 2011	In Loss Position Less Than 12 Months					In Loss Position More Than 12 Months					Total In Loss Position
Description	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Commercial paper	$	4,288	$	(6	)	$	—	$	—		$	4,288	$	(6	)
Corporate notes and bonds		12,947		(16	)		—		—			12,947		(16	)
U.S. government agency securities		3,805		(1	)		—		—			3,805		(1	)
Auction-rate security		—		—			1,111		(289	)		1,111		(289	)
Total	$	21,040	$	(23	)	$	1,111	$	(289	)	$	22,151	$	(312	)

Computation of basic and diluted net loss per share

The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share amounts):

	Year Ended December 31,
	2012			2011			2010
Net loss	$	(5,424	)	$	(18,640	)	$	(18,067	)
Basic:
Weighted-average shares of common stock outstanding		48,798			48,288			46,818
Shares used in computing basic net loss per share		48,798			48,288			46,818
Basic net loss per share	$	(0.11	)	$	(0.39	)	$	(0.39	)
Diluted:
Weighted-average shares of common stock outstanding		48,798			48,288			46,818
Add: Common equivalent shares outstanding		—			—			—
Shares used in computing diluted net loss per share		48,798			48,288			46,818
Diluted net loss per share	$	(0.11	)	$	(0.39	)	$	(0.39	)

Fair value of stock-based awards valuation assumptions

The fair value of our stock-based awards was estimated using the following weighted average assumptions for the years ended December 31, 2012, 2011 and 2010:

	Stock Option Plan									Employee Stock Purchase Plan
	2012			2011			2010			2012			2011			2010
Risk-free interest rate		0.6	%		1.0	%		1.7	%		0.1	%		0	%		n/a
Expected term (in years)		3.7			3.6			3.6			0.5			0.5			n/a
Volatility		57.2	%		59.2	%		66.6	%		62.3	%		75.3	%		n/a
Expected dividend		0	%		0	%		0	%		0	%		0	%		n/a
Weighted average grant-date fair value	$	1.30		$	1.63		$	1.71		$	1.15		$	0.77			n/a

Stock-based compensation expense

We recorded the following stock-based compensation expense for the fiscal years ended December 31, 2012, 2011 and 2010 (in thousands):

	For the Year Ended December 31,
	2012		2011		2010
Stock option compensation expense recognized in:
Cost of service	$	305	$	222	$	168
Cost of software and others		25		28		1
Research and development		1,004		806		588
Sales and marketing		478		581		693
General and administrative		2,464		2,088		1,881
	$	4,276	$	3,725	$	3,331
ESPP compensation expense recognized in:
Cost of service	$	49	$	23	$	—
Cost of software and others		1		1		—
Research and development		15		10		—
Sales and marketing		5		5		—
General and administrative		10		5		—
	$	80	$	44	$	—
RSU compensation expense recognized in:
General and administrative	$	169	$	—	$	—
Stock-based compensation expense included in total costs and expenses	$	4,525	$	3,769	$	3,331

Fair Value, Assets Measured on Recurring Basis

In accordance with ASC 820, the following table represents our fair value hierarchy for our financial assets (cash equivalents and investments) measured at fair value on a recurring basis as of December 31, 2012 and 2011 (in thousands):

As of December 31, 2012	Level 1		Level 2		Level 3		Total
Money market funds	$	17,235	$	—	$	—	$	17,235
Certificates of deposits		1,879		—		—		1,879
Commercial paper		—		5,745		—		5,745
Corporate notes and bonds		—		20,173		—		20,173
U.S. government agency securities		—		202		—		202
Total	$	19,114	$	26,120	$	—	$	45,234

As of December 31, 2011	Level 1		Level 2		Level 3		Total
Money market funds	$	15,698	$	—	$	—	$	15,698
Certificates of deposits		480		—		—		480
Commercial paper		—		6,289		—		6,289
Corporate notes and bonds		—		15,268		—		15,268
U.S. government agency securities		—		7,706		—		7,706
Auction-rate security	$	—		—		1,111		1,111
Total	$	16,178	$	29,263	$	1,111	$	46,552

Summary of changes in fair value of financial assets

The following table provides a summary of changes in fair value of our Level 3 financial assets during the years ended December 31, 2012 and 2011 (in thousands):

	Year Ended December 31,
	2012			2011
Beginning balance	$	1,111		$	2,667
Sales		(1,400	)		(1,400	)
Total gain (loss) included in other comprehensive loss		289			(156	)
Ending balance	$	—		$	1,111

Summary of Long-lived assets by geographical location

Long-lived assets are attributed to the geographic location in which they are located.  We include in long-lived assets all tangible assets.  Long-lived assets regarding geographic areas are as follows (in thousands):

	December 31,
	2012		2011
United States	$	552	$	418
India		39		43
Total	$	591	$	461