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Share-based compensation (Tables)
12 Months Ended
Dec. 31, 2021
Summary of Share Option Activity

    

    

    

Weighted 

    

Weighted

Weighted-

average 

average

average

remaining 

Aggregate

Number of

exercise

grant-date

contractual life

intrinsic

    

share options

    

price (USD)

    

fair value (USD)

    

 (years)

    

value (USD)

Outstanding, January 1, 2019

 

16,500

 

3.97

 

 

1.37

 

Vested and expected to vest as of January 1, 2019

 

16,500

 

3.97

 

1.56

 

1.37

 

Exercisable as of January 1, 2019

 

16,500

 

3.97

 

1.56

 

1.37

 

Expired

 

(6,500)

 

3.97

 

 

  

 

  

Outstanding, December 31, 2019

 

10,000

 

3.97

 

 

1.16

 

Vested and expected to vest as of December 31, 2019

 

10,000

 

3.97

 

1.01

 

1.16

 

Exercisable as of December 31, 2019

 

10,000

 

3.97

 

1.01

 

1.16

 

Expired

 

(10,000)

 

3.97

 

Outstanding, December 31, 2020

 

 

 

Vested and expected to vest as of December 31, 2020 and 2021

 

 

 

Schedule of Recognized Compensation Costs

Total compensation costs recognized for the years ended December 31, 2019, 2020 and 2021 are as follows:

Years ended December 31, 

(In thousands)

    

2019

    

2020

    

2021

Sales and marketing expenses

 

381

 

185

 

59

General and administrative expenses

 

2,453

 

1,209

 

4,682

Research and development expenses

 

2,594

 

916

 

1,429

Total

 

5,428

 

2,310

 

6,170

2013 Plan [Member]  
Summary of Restricted Shares Activities

A summary of the restricted shares activities under the 2013 Plan for the years ended December 31, 2019, 2020 and 2021 is presented below:

    

Number of 

restricted shares

Unvested as of January 1, 2019

 

34,175

Vested

 

(27,475)

Forfeited

 

(6,700)

Unvested as of December 31, 2019

 

Expected to vest as of December 31, 2019

 

2010 share incentive plan [Member]  
Summary of Restricted Shares Activities

A summary of the restricted shares activities under the 2010 Plan for the years ended December 31, 2019, 2020 and 2021 is presented below:

Weighted-average

Number of 

grant-date fair

    

restricted shares

    

value(USD)

Unvested as of January 1, 2019

 

6,652,040

 

  

Expected to vest as of January 1, 2019

5,654,234

 

  

Granted

 

800,000

 

0.81

Vested

 

(1,296,540)

 

  

Forfeited

 

(971,000)

 

  

Unvested as of December 31, 2019

 

5,184,500

 

  

Expected to vest as of December 31, 2019

 

4,406,825

 

Vested

 

(965,500)

 

Forfeited

 

(2,959,000)

 

Unvested as of December 31, 2020

 

1,260,000

 

Expected to vest at December 31, 2020

 

1,071,000

 

Vested

 

(400,000)

 

Forfeited

 

(210,000)

 

Unvested as of December 31, 2021

 

650,000

 

Expected to vest as of December 31, 2021

 

552,500

 

2014 Plan [Member]  
Summary of Restricted Shares Activities

A summary of the restricted shares activities under the 2014 Plan for the years ended December 31, 2019, 2020 and 2021 is presented below:

    

Number of 

restricted 

shares

Unvested as of January 1, 2019

 

3,476,650

Vested

 

(1,318,450)

Forfeited

 

(837,000)

Unvested as of December 31, 2019

 

1,321,200

Expected to vest as of December 31, 2019

 

1,123,020

Unvested as of January 1, 2020

 

1,321,200

Vested

 

(228,200)

Forfeited

 

(1,067,000)

Unvested as of December 31, 2020

 

26,000

Expected to vest as of December 31, 2020

 

22,100

Unvested as of January 1, 2021

 

26,000

Vested

 

(26,000)

Unvested as of December 31, 2021

 

Expected to vest as of December 31, 2021

 

2020 Incentive Plan  
Summary of Restricted Shares Activities

Weighted-average

    

Number of 

    

 grant-date fair 

restricted shares

value (USD)

Unvested as of January 1,2021

 

 

  

Granted

 

31,091,840

 

0.83

Vested

 

(2,429,965)

 

  

Forfeited

 

(2,777,500)

 

  

Unvested as of December 31, 2021

 

25,884,375

 

  

Expected to vest as of December 31, 2021

 

19,413,281