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Common Stock and Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2012

Common Stock and Stock-Based Compensation Plans [Abstract]

Summary of stock option activity and related information

		Number of options				Weighted average exercise price				Weighted average remaining contractual term				Aggregate intrinsic- value
Outstanding as of March 31, 2012			1,864,858			$	15.79
Granted			165,000				17.38
Exercised			(7,615	)			8.06
Forfeited or expired			(3,447	)			23.79
Outstanding as of June 30, 2012			2,018,796			$	15.93				4.9			$	3,383,254
Exercisable as of June 30, 2012			1,134,037			$	11.84				3.7			$	6,548,109

Equity-based compensation expense included in interim condensed consolidated statements of comprehensive income

		Six months ended June 30,								Three months ended June 30,
		2012				2011				2012				2011
		(unaudited)				(unaudited)				(unaudited)				(unaudited)
Cost of revenue		$	104			$	110			$	53			$	61
Research and development, net			859				862				394				484
Sales and marketing			439				456				200				255
General and administrative			920				697				430				371
Total equity-based compensation expense		$	2,322			$	2,125			$	1,077			$	1,171

Assumptions used to estimate stock options granted to employees and non-employees directors

		Three months ended June 30,
		2012				2011
		(unaudited)				(unaudited)
Expected dividend yield			0	%			0	%
Expected volatility			47%-58	%			39%-56	%
Risk-free interest rate			0.2%-1.2	%			0.2%-2.5	%
Expected forfeiture (employees)			10	%			10	%
Expected forfeiture (executives)			5	%			5	%
Contractual term of up to			10 Years				10 Years
Suboptimal exercise multiple (employees)			2.1				2.0
Suboptimal exercise multiple (executives)			2.4				2.3

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F



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-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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