Quarterly report pursuant to Section 13 or 15(d)

Stock Plans (Tables)

v3.19.2
Stock Plans (Tables)
6 Months Ended
Jun. 30, 2019
Stock Plans  
Schedule of stock-based compensation expense recorded for awards under our stock option plans

The following table summarizes the stock-based compensation expense recorded for awards under our stock option plans (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

Six Months Ended

 

 

June 30, 

 

June 30, 

 

    

2019

    

2018

    

2019

    

2018

Research and development

 

$

14

 

$

156

 

$

91

 

$

318

Selling, general and administrative

 

 

336

 

 

246

 

 

395

 

 

516

Total stock-based compensation

 

$

350

 

$

402

 

$

486

 

$

834

 

Schedule of estimate the fair value of stock options

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

Six Months Ended

 

 

 

June 30, 

 

June 30, 

 

 

    

2019

    

2018

    

2019

    

2018

 

Weighted-average risk-free interest rate

 

2.1

%  

2.9

%  

2.2

%  

2.7

%

Expected dividend payments

 

 —

 

 —

 

 —

 

 —

 

Expected holding period (years) 1

 

 5.9

 

 6.4

 

 5.4

 

 6.4

 

Weighted-average volatility factor 2

 

0.93

 

0.91

 

0.94

 

0.89

 

Estimated forfeiture rates for options granted 3

 

21

%  

25

%  

21

%  

26

%

 

(1)

Expected holding period is based on historical experience of similar awards, giving consideration to the contractual terms of the stock-based awards, vesting schedules and the expectations of future employee behavior.

(2)

Weighted average volatility is based on the historical volatility of our common stock.

(3)

Estimated forfeiture rates are based on historical data.

Schedule of option activity

The following table summarizes option activity:

 

 

 

 

 

 

 

 

 

 

 

 

 

    

 

    

 

 

    

Weighted

    

 

 

 

 

 

 

Weighted

 

Average

 

 

 

 

 

 

 

Average 

 

Remaining

 

Aggregate

 

 

 

 

Exercise

 

Option

 

Intrinsic

 

 

Options (in

 

Price per

 

Term (in

 

Value (in

 

 

thousands)

 

share

 

years)

 

thousands)

Outstanding at January 1, 2019

 

665

 

$

17.94

 

 6.44

 

$

4.0

Granted

 

854

 

 

1.64

 

 

 

 

 

Cancelled

 

(217)

 

 

26.49

 

 

 

 

 

Outstanding at June 30, 2019

 

1,302

 

 

5.82

 

8.47

 

 

0.8

Exercisable at June 30, 2019

 

669

 

 

9.83

 

7.23

 

 

0.1