Equity Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2014

Summary of Plan Includes Stock Options and Restricted Stock Units

The following is a summary of, the 2004 Plan, and the 2005 Plan, which includes stock options and restricted stock units:


	Unit (in Thousands)
Available for grant at January 1, 2012		6,506
Restricted stock units granted		(1,461	)
Option and restricted stock units forfeited		291

Available for grant at December 31, 2012		5,336
Restricted stock units granted		(1,893	)
Option and restricted stock units forfeited		123

Available for grant at December 31, 2013		3,566
Restricted stock units granted		(1,923	)
Option and restricted stock units forfeited		44

Available for grant at December 31, 2014		1,687

Summary of Stock Option Activity

A summary of the stock option activity and related information is as follows:


	Number of Options Shares (in Thousands)			Weighted Average Exercise Price (US$)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2012		1,849			1.47
Options forfeited		—			—
Options exercised		(152	)		1.47

Outstanding at December 31, 2012		1,697			1.47		3.14

Options vested and expected to vest after December 31, 2012		1,697			1.47		3.14
Options forfeited		—			—
Options exercised		(287	)		1.47

Outstanding at December 31, 2013		1,410			1.47		2.14

Options vested and expected to vest after December 31, 2013		1,410			1.47		2.14
Options forfeited		—			—
Options exercised		(352	)		1.46

Outstanding at December 31, 2014		1,058			1.47		1.35

Options vested and expected to vest after December 31, 2014		1,058			1.47		1.35

Options exercisable at December 31, 2014		1,058			1.47		1.35

Summary of Restricted Stock Units and Changes

A summary of the status of restricted stock units and changes is as follows:


	Number of Non-vested Stock Units (in Thousands)			Weighted Average Grant Date Fair Value (US$)		Weight Average Remaining Recognition Period (Years)
Non-vested at January 1, 2012		11,164			1.99
Restricted stock units granted		1,461			4.55
Restricted stock units vested		(5,316	)		1.75
Restricted stock units forfeited		(291	)		2.47

Non-vested at December 31, 2012		7,018			2.68		0.83
Restricted stock units granted		1,893			3.13
Restricted stock units vested		(4,867	)		2.60
Restricted stock units forfeited		(123	)		2.60

Non-vested at December 31, 2014		3,921			2.90		0.43
Restricted stock units granted		1,923			5.13
Restricted stock units vested		(3,640	)		2.96
Restricted stock units forfeited		(44	)		4.92

Non-vested at December 31, 2014		2,160			4.90		0.31

Stock-based Compensation Expense

The following table shows total stock-based compensation expense included in the Consolidated Statements of Income for the years ended December 31, 2012, 2013 and 2014.


	Year Ended December 31
	2012		2013		2014
	US $		US $		US$
Cost of sales		375		308		282
Research and development		7,055		6,351		6,773
Sales and marketing		2,494		2,197		1,746
General and administrative		1,878		1,406		1,546

		11,802		10,262		10,347