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Share-based compensation (Tables)
6 Months Ended
Jun. 30, 2022
Share-based compensation  
Schedule of share-based compensation expense by classification included in consolidated statements of operations and comprehensive loss

    

Three months ended June 30, 

Six months ended June 30, 

    

2022

    

2021

2022

2021

(in thousands)

(in thousands)

Research and development

$

4,306

$

3,294

$

8,360

$

5,974

Selling, general and administrative

3,359

3,737

6,174

6,818

Cost of contract manufacturing

148

148

Total

$

7,813

$

7,030

$

14,682

$

12,792

Schedule of share-based compensation expense

Three months ended June 30, 

Six months ended June 30, 

    

2022

    

2021

2022

2021

(in thousands)

(in thousands)

Award type/ESPP

Share options

$

3,438

$

3,350

$

6,693

$

6,190

Restricted share units

4,127

3,222

7,397

5,782

Performance share units

242

449

580

803

ESPP

6

9

12

17

Total

$

7,813

$

7,030

$

14,682

$

12,792

Schedule of unrecognized compensation cost related to unvested awards

    

Unrecognized

  

Weighted average

    

share-based

    

remaining

compensation

period for

expense

     recognition     

(in thousands)

(in years)

Award type

Share options

$

32,429

2.76

Restricted share units

33,228

2.20

Performance share units

202

0.21

Total

$

65,859

2.47

Schedule of weighted-average assumptions for fair value of option issued

Three months ended June 30, 

    

Six months ended June 30, 

Assumptions

    

2022

    

2021

    

2022

    

2021

Expected volatility

70%

75%

70%

75%

Expected terms

10 years

10 years

10 years

10 years

Risk free interest rate

3.03% - 3.44%

1.72 - 1.85%

2.12% - 3.44%

1.21 - 1.85%

Expected dividend yield

0%

0%

0%

0%

Summary of RSUs activity

RSU

    

    

Weighted average

Number of

grant-date fair

ordinary shares

value

Non-vested at December 31, 2021

710,617

$

38.89

Granted

1,496,443

$

15.81

Vested

(230,794)

$

39.64

Forfeited

(94,596)

$

25.20

Non-vested at June 30, 2022

1,881,670

$

21.13

Total weighted average grant date fair value of RSUs granted during the period (in $ millions)

$

23.7

Summary of PSUs activity

PSU

    

    

Weighted average

Number of

grant-date fair

ordinary shares

value

Non-vested at December 31, 2021

632,930

$

33.54

Granted

34,700

$

15.11

Vested

(77,330)

$

57.56

Forfeited

(24,400)

$

29.35

Non-vested at June 30, 2022

565,900

$

29.31

2014 Plan.  
Share-based compensation  
Summary of option activity

Options

Number of

Weighted average

    

ordinary shares

    

exercise price

Outstanding at December 31, 2021

3,308,325

$

31.02

Granted

1,343,496

$

15.66

Forfeited

(106,166)

$

37.70

Expired

(66,587)

$

39.53

Exercised

(68,594)

$

6.39

Outstanding at June 30, 2022

4,410,474

$

26.44

Thereof, fully vested and exercisable on June 30, 2022

2,045,905

$

27.21

Thereof, outstanding and expected to vest after June 30, 2022

2,364,569

$

25.77

Total weighted average grant date fair value of options issued during the period (in $ millions)

$

11.9

Proceeds from option sales during the period (in $ millions)

$

0.5