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 purchase)
|
03/18/2002 |
03/18/2012 |
Common Stock
|
2,062.5
|
$
2.6909
|
D
|
Â
|
Stock Option (right to purchase)
|
03/24/2003 |
03/24/2013 |
Common Stock
|
2,062.5
|
$
2.4
|
D
|
Â
|
Stock Option (right to purchase)
|
04/19/2004 |
04/19/2014 |
Common Stock
|
3,437.5
|
$
8.7273
|
D
|
Â
|
Stock Option (right to purchase)
|
03/21/2005 |
03/21/2015 |
Common Stock
|
1,562.5
|
$
6.768
|
D
|
Â
|
Stock Option (right to purchase)
|
03/20/2006 |
03/20/2016 |
Common Stock
|
937.5
|
$
7.9316
|
D
|
Â
|
Stock Option (right to purchase)
|
03/26/2007 |
03/26/2017 |
Common Stock
|
1,200
|
$
11.895
|
D
|
Â
|
Stock Option (right to purchase)
|
04/01/2008 |
04/01/2018 |
Common Stock
|
600
|
$
8.95
|
D
|
Â
|
Stock Option (right to purchase)
|
03/18/2009 |
03/18/2019 |
Common Stock
|
600
|
$
6.22
|
D
|
Â
|
Stock Option (right to purchase)
|
03/15/2010 |
03/15/2020 |
Common Stock
|
1,000
|
$
7.36
|
D
|
Â
|
Stock Option (right to purchase)
|
03/14/2011 |
03/14/2021 |
Common Stock
|
1,000
|
$
7.95
|
D
|
Â
|
Stock Option (right to purchase)
|
03/18/2002 |
03/18/2012 |
Common Stock
|
85,250
|
$
2.6909
|
I
|
See footnote
(2)
|
Stock Option (right to purchase)
|
04/19/2004 |
04/19/2014 |
Common Stock
|
41,250
|
$
8.7273
|
I
|
See footnote
(2)
|
Stock Option (right to purchase)
|
03/20/2006 |
03/20/2016 |
Common Stock
|
21,250
|
$
7.9316
|
I
|
See footnote
(2)
|
Stock Option (right to purchase)
|
04/12/2007 |
04/12/2017 |
Common Stock
|
14,000
|
$
11.445
|
I
|
See footnote
(2)
|
Stock Option (right to purchase)
|
04/01/2008 |
04/01/2018 |
Common Stock
|
6,275
|
$
9.845
|
I
|
See footnote
(2)
|
Stock Option (right to purchase)
|
03/18/2009 |
03/18/2019 |
Common Stock
|
5,000
|
$
6.842
|
I
|
See footnote
(2)
|
Stock Option (right to purchase)
|
03/15/2010 |
03/15/2021 |
Common Stock
|
5,000
|
$
8.096
|
I
|
See footnote
(2)
|