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Stock Incentive Plans (Tables)
3 Months Ended
Mar. 31, 2018
Stock Incentive Plans  
Summary of stock option activity

 

 

Shares

 

Weighted-
Average Exercise
Price

 

Weighted 
Average 
Remaining 
Contractual 
Term (years)

 

Aggregate 
Intrinsic Value
(in thousands)

 

Outstanding at December 31, 2017

 

2,845,626

 

$

4.53

 

7.75

 

$

216

 

Granted

 

930,000

 

$

1.28

 

 

 

 

 

Exercised

 

 

$

 

 

 

 

 

Cancelled or forfeited

 

 

$

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outstanding at March 31, 2018

 

3,775,626

 

$

3.73

 

8.08

 

$

1,001

 

 

 

 

 

 

 

 

 

 

 

 

 

Vested and Exercisable at March 31, 2018

 

1,573,375

 

$

5.30

 

6.72

 

$

140