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Share-based compensation (Tables)
9 Months Ended
Sep. 30, 2017
Share-based compensation  
Schedule of share-based compensation expense by classification included in consolidated statements of operations and comprehensive loss

 

 

 

 

 

 

 

 

 

 

 

 

 

    

 

Three months ended September 30, 

 

Nine months ended September 30, 

 

    

2017

    

2016

 

2017

 

2016

 

 

in thousands

Research and development - employees

 

$

1,131

 

$

893

 

$

2,612

 

$

2,670

Selling, general and administrative - employees

 

 

1,316

 

 

30

 

 

3,366

 

 

1,680

Research and development - non-employees

 

 

 —

 

 

 —

 

 

 —

 

 

670

Total

 

$

2,447

 

$

923

 

$

5,978

 

$

5,020

 

Schedule of share-based compensation expense

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three months ended September 30, 

 

Nine months ended September 30, 

 

    

2017

    

2016

 

2017

 

2016

Award type

 

in thousands

Share options

 

$

638

 

$

718

 

$

2,347

 

$

4,408

Restricted share units (“RSUs”)

 

 

728

 

 

88

 

 

1,960

 

 

323

Performance share units (“PSUs”)

 

 

1,081

 

 

117

 

 

1,671

 

 

289

Total

 

$

2,447

 

$

923

 

$

5,978

 

$

5,020

 

Schedule of unrecognized compensation cost related to unvested awards

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted-average

 

    

Unrecognized

    

remaining

 

 

compensation

 

period for

 

 

costs

 

     recognition     

Award type

 

in thousands

 

in years

Share options

 

$

7,041

 

2.52

Restricted share units

 

 

4,003

 

1.64

Performance share units

 

 

3,747

 

1.84

Total

 

$

14,791

 

2.11

 

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

 

 

 

 

 

 

 

 

 

 

 

Three months ended September 30, 

 

Nine months ended September 30, 

Assumptions

    

2017

 

2016

 

2017

 

2016

Expected volatility

 

80%

 

75%

 

75% - 80%

 

75%

Expected terms (in years)

 

10 years

 

10 years

 

10 years

 

10 years

Risk free interest rate

 

2.40% - 2.48%

 

1.52% - 1.89%

 

2.40% - 2.81%

 

0.16% - 1.96%

Expected dividends

 

0%

 

0%

 

0%

 

0%

 

Summary of RSUs activity

 

 

 

 

 

 

 

 

 

 

RSU

 

 

 

 

 

Weighted average

 

 

 

 

 

grant-date fair

 

    

Number of shares

    

value

Non-vested at December 31, 2016

 

 

307,063

 

$

9.11

Granted

 

 

428,350

 

$

6.00

Vested

 

 

(25,000)

 

$

18.21

Forfeited

 

 

(38,550)

 

$

7.15

Non-vested at September 30, 2017

 

 

671,863

 

$

6.90

 

 

 

 

 

 

 

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

 

 

 

 

$

2.6

Grants during the period to directors and officers

 

 

255,000

 

$

5.95

 

Summary of PSUs activity

 

 

 

 

 

 

 

 

 

 

PSU

 

 

 

 

 

Weighted average

 

 

 

 

 

grant-date fair

 

    

Number of shares

    

value

Non-vested at December 31, 2016

 

 

111,564

 

$

5.76

Granted

 

 

13,000

 

$

4.99

Retired

 

 

(12,000)

 

$

5.76

Vested

 

 

(58,500)

 

$

5.76

Non-vested at September 30, 2017

 

 

54,064

 

$

5.57

PSUs awarded but not yet earned

 

 

437,060

 

 

 

Total non-vested and discretionary PSUs

 

 

491,124

 

 

 

 

 

 

 

 

 

 

Total weighted average grant date fair value of PSUs awarded during the period (in $ million)

 

 

 

 

$

2.0

 

2014 Plan  
Share-based compensation  
Summary of option activity

 

 

 

 

 

 

 

 

2014 plan

 

 

 

 

Weighted average

 

    

Options

    

exercise price

 

 

 

 

 

 

Outstanding at December 31, 2016

 

1,812,766

 

$

12.47

Granted

 

949,350

 

$

6.17

Forfeited

 

(348,697)

 

$

7.95

Expired

 

(164,106)

 

$

14.46

Exercised

 

(8,125)

 

$

7.49

Outstanding at September 30, 2017

 

2,241,188

 

$

10.38

Fully vested and exercisable

 

820,522

 

$

12.58

Outstanding and expected to vest

 

1,420,666

 

$

9.10

 

 

 

 

 

 

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

 

 

 

$

3.5

Grants during the period to directors and officers

 

641,250

 

$

6.43

Proceeds from option sales (in $ million)

 

 

 

 

 —

 

2012 Plan  
Share-based compensation  
Summary of option activity

 

 

 

 

 

 

 

 

2012 plan

 

 

 

 

Weighted average

 

    

Options

    

exercise price

 

 

 

 

 

 

Outstanding at December 31, 2016

 

483,006

 

5.13

Exercised

 

(286,804)

 

3.07

Forfeited

 

(5,000)

 

3.07

Expired

 

(9,000)

 

3.07

Outstanding, fully vested and exercisable at September 30, 2017

 

182,202

 

8.52

 

Other Plans  
Share-based compensation  
Summary of option activity

 

 

 

 

 

 

 

 

 

Other plans

 

 

 

 

 

Weighted average

 

    

Options

    

exercise price

 

 

 

 

 

 

 

Outstanding at December 31, 2016

 

 

187,500

 

$

17.93

Granted

 

 

300,000

 

$

6.90

Expired

 

 

(62,500)

 

$

27.82

Outstanding at September 30, 2017

 

 

425,000

 

$

8.69

Fully vested and exercisable

 

 

39,062

 

$

12.98

Outstanding and expected to vest

 

 

385,938

 

$

8.25

 

 

 

 

 

 

 

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

 

 

 

 

$

1.2