1. Title of Derivative Security (Instr. 4) |
2. Date Exercisable and Expiration Date (Month/Day/Year) |
3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) |
4. Conversion or Exercise Price of Derivative Security |
5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5) |
6. Nature of Indirect Beneficial Ownership (Instr. 5) |
Date Exercisable |
Expiration Date |
Title |
Amount or Number of Shares |
Stock Option (Right to Buy)
|
Â
(1)
|
09/15/2010 |
Common Stock
|
6,451
|
$
8.525
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(1)
|
02/03/2011 |
Common Stock
|
6,451
|
$
8.525
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(1)
|
02/03/2011 |
Common Stock
|
3,387
|
$
8.525
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(1)
|
02/23/2012 |
Common Stock
|
3,225
|
$
8.525
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(1)
|
12/19/2012 |
Common Stock
|
5,161
|
$
3.1
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(1)
|
01/23/2013 |
Common Stock
|
11,855
|
$
3.1
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(1)
|
01/23/2013 |
Common Stock
|
2,655
|
$
3.1
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(1)
|
02/24/2014 |
Common Stock
|
4,570
|
$
3.1
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(1)
|
09/02/2014 |
Common Stock
|
6,451
|
$
12.4
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(1)
|
09/02/2014 |
Common Stock
|
12,903
|
$
12.4
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(2)
|
10/03/2014 |
Common Stock
|
18,750
|
$
16
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(2)
|
10/03/2014 |
Common Stock
|
29,250
|
$
16
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(3)
|
02/09/2015 |
Common Stock
|
12,000
|
$
18.37
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(3)
|
02/09/2015 |
Common Stock
|
9,900
|
$
18.37
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(3)
|
02/07/2016 |
Common Stock
|
9,900
|
$
29.65
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(3)
|
02/13/2017 |
Common Stock
|
13,200
|
$
34
|
D
|
Â
|
Stock Option (Right to Buy)
|
Â
(3)
|
07/01/2017 |
Common Stock
|
16,500
|
$
32.78
|
D
|
Â
|