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Equity Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Plan Includes Stock Options and Restricted Stock Units

The following is a summary of, the 2005 Plan and the 2015 Plan, which includes stock options and restricted stock units:

		Unit (in Thousands)
Available for grant at January 1, 2013			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
Authorized			20,000
Restricted stock units granted			(2,000	)
Option and restricted stock units forfeited			175
Available for grant at December 31, 2015			19,862

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, 2013			1,697				1.47
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 forfeited			(143	)			1.47
Options exercised			(336	)			1.47
Outstanding at December 31, 2015			579				1.47				0.92
Options vested and expected to vest after December 31, 2015			579				1.47				0.92
Options exercisable at December 31, 2015			579				1.47				0.92

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, 2013			7,018				2.68
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, 2013			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
Restricted stock units granted			2,000				6.83
Restricted stock units vested			(2,003	)			4.96
Restricted stock units forfeited			(32	)			5.85
Non-vested at December 31, 2015			2,125				6.65				0.73

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, 2013, 2014 and 2015.

		Year Ended December 31
		2013				2014				2015
		US$				US$				US$
Cost of sales			308				282				261
Research and development			6,351				6,773				6,565
Sales and marketing			2,197				1,746				1,790
General and administrative			1,406				1,546				1,802
			10,262				10,347				10,418

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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