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Share-based Compensation
6 Months Ended
Jun. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Share-based Compensation

(8) Share-based Compensation

For the three and six month periods ended June 30, 2015 and 2014, the Company recognized the following non-cash, share-based compensation expense in the statements of operations (in thousands):

 

 

Three Months

Ended June 30,

 

 

Six Months

Ended June 30,

 

 

2015

 

 

2014

 

 

2015

 

 

2014

 

Research and development

$

47

 

 

$

42

 

 

$

89

 

 

$

82

 

General and administrative

 

128

 

 

 

130

 

 

 

216

 

 

 

248

 

Total

$

175

 

 

$

172

 

 

$

305

 

 

$

330

 

 

 

Stock option transactions for the six month period ended June 30, 2015 under the Company’s stock incentive plans were as follows:

 

Number

of Options

 

 

Weighted Average Exercise Price

 

 

Weighted

Average

Remaining

Contractual

Term

(in years)

 

Options outstanding at December 31, 2014

 

1,068,515

 

 

$

2.89

 

 

 

8.25

 

Granted

 

137,380

 

 

 

0.69

 

 

 

 

 

Exercised

 

 

 

 

 

 

 

Forfeited and cancelled

 

(6,866

)

 

 

1.69

 

 

 

 

 

Options outstanding at June 30, 2015

 

1,199,029

 

 

$

2.64

 

 

 

7.92

 

Options exercisable at June 30, 2015

 

660,493

 

 

$

3.62

 

 

 

7.34

 

Options vested and expected to vest

 

1,197,613

 

 

$

2.65

 

 

 

7.92

 

 

Stock award transactions for the six month period ended June 30, 2015 under the Company’s stock incentive plans were as follows:

 

Number

of Shares

 

 

Weighted

Average

Grant Date

Fair Value

 

Restricted stock units outstanding at December 31, 2014

 

471,029

 

 

$

1.62

 

Granted

 

212,320

 

 

 

0.68

 

Vested and released

 

(47,925

)

 

 

1.95

 

Forfeited and cancelled

 

(6,041

)

 

 

1.01

 

Restricted stock units outstanding at June 30, 2015

 

629,383

 

 

$

1.28