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Stock Incentive Plans (Tables)
 6 Months Ended
Jun. 30, 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

 
1,000,000

 

$
1.29

 

 

 

 

 

Exercised

 
(2,917

)

$
1.24

 

 

 

 

 

Cancelled or forfeited

 
(153,489

)

$
2.78

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outstanding at June 30, 2018

 
3,689,220

 

$
3.73

 
7.84

 

$

—

 

 

 

 

 

 

 

 

 

 

 

 

 

Vested and Exercisable at June 30, 2018

 
1,738,080

 

$
5.20

 
6.64

 

$

—