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SHARE-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of General Terms of Stock-Based Compensation Plans for Awards Granted

Summarized below are the general terms of our stock-based compensation plans, for which awards have been granted as of December 31, 2020.

 

Stock-Based compensation plan

 

Granted awards

 

 

 

Vesting schedule

 

Options’ exercise

price

 

RSUs’ grant date

fair value

 

2004 plan

 

 

1,575,037

 

(1)

 

immediately upon granting to four years

 

$3.95~$12.75

 

 

—

 

2006 Plan

 

 

256,716

 

(2)

 

immediately upon granting to four years

 

$3.85~$83

 

$14.55~$80.05

 

2007 Plan

 

 

675,057

 

(3)

 

immediately upon granting to four years

 

$2.90~$90.85

 

$12.35~$76.75

 

2008 Plan

 

 

200,000

 

 

 

immediately upon granting to six years

 

$12.35~$21.20

 

 

—

 

2009 Plan

 

 

500,000

 

(4)

 

immediately upon granting to four years

 

$4.775~$12.35

 

 

—

 

2010 Plan

 

 

440,000

 

(5)

 

three years

 

$4.0505~$5.7

 

 

—

 

 

(1)

The granted awards, net of forfeited or canceled options, were within reserved shares of 1,400 thousand common shares.

(2)

The granted awards, net of forfeited or canceled options or shares, were within reserved shares of 200 thousand common shares.

(3)

The granted awards, net of forfeited or canceled options or shares, were within reserved shares of 400 thousand common shares.

(4)

The granted awards, net of forfeited or canceled options, were within reserved shares of 300 thousand common shares.

(5)

The granted awards, net of forfeited or canceled options, were within reserved shares of 200 thousand common shares.
Summary of Option Transactions

Option transactions during the last three years are summarized as follows:

 

 

2018

 

 

2019

 

 

2020

 

 

 

Weighted

Avg.

Exercise

Price

 

 

No. of

Shares

(in thousands)

 

 

Weighted

Avg.

Exercise

Price

 

 

No. of

Shares

(in thousands)

 

 

Weighted

Avg.

Exercise

Price

 

 

No. of

Shares

(in thousands)

 

 

Weighted-

Average

Remaining

Contractual

Term

 

 

Aggregate

Intrinsic

Value

(in thousands)

 

Balance at January 1

 

$

14.78

 

 

 

308

 

 

$

10.88

 

 

 

229

 

 

$

11.00

 

 

 

225

 

 

 

 

 

 

 

 

 

Options granted

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

 

 

 

 

 

 

Options exercised

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

 

 

 

 

 

 

Options Forfeited / canceled / expired

 

 

26.08

 

 

 

(79

)

 

 

3.85

 

 

 

(4

)

 

 

12.35

 

 

 

(176

)

 

 

 

 

 

 

 

 

Balance at December 31

 

$

10.88

 

 

 

229

 

 

$

11.00

 

 

 

225

 

 

$

6.16

 

 

 

49

 

 

 

2.58

 

 

$

1

 

Exercisable at December 31

 

$

10.97

 

 

 

227

 

 

$

11.05

 

 

 

224

 

 

$

6.16

 

 

 

49

 

 

 

2.58

 

 

$

1

 

Vested and expected to vest at

   December 31

 

$

10.88

 

 

 

229

 

 

$

11.00

 

 

 

225

 

 

$

6.16

 

 

 

49

 

 

 

2.58

 

 

$

1

 

 
Information about Stock Options Outstanding

The following table sets forth information about stock options outstanding at December 31, 2020:

 

Options outstanding

 

Option currently exercisable

 

Exercise price

 

No. of Shares

(in thousands)

 

 

Weighted

average

remaining

contractual life

 

Exercise price

 

No. of Shares

(in thousands)

 

Under $5

 

 

8

 

 

3.68 years

 

Under $5

 

 

8

 

$5~$50

 

 

41

 

 

2.36 years

 

$5~$50

 

 

41

 

$50~$100

 

 

—

 

 

 

 

$50~$100

 

 

—

 

 

 

 

49

 

 

 

 

 

 

 

49