|  | 
               
                Stifel
               
             | 
             |  | 
               
                Roth Capital Partners
               
             | 
             | 
|  |  |  | 
               
                Page 
               
             | 
             | |||
|  |  |  |  | S-1 |  |  | |
|  |  |  |  | S-2 |  |  | |
|  |  |  |  | S-4 |  |  | |
|  |  |  |  | S-5 |  |  | |
|  |  |  |  | S-6 |  |  | |
|  |  |  |  | S-8 |  |  | |
|  |  |  |  | S-9 |  |  | |
|  |  |  |  | S-10 |  |  | |
|  |  |  |  | S-11 |  |  | |
|  |  |  |  | S-12 |  |  | |
|  |  |  |  | S-12 |  |  | |
|  |  |  |  | S-12 |  |  | |
|  |  |  |  |  | 1 |  |  | |
|  |  |  |  |  | 2 |  |  | |
|  |  |  |  |  | 3 |  |  | |
|  |  |  |  |  | 4 |  |  | |
|  |  |  |  |  | 6 |  |  | |
|  |  |  |  |  | 7 |  |  | |
|  |  |  |  |  | 8 |  |  | |
|  |  |  |  |  | 20 |  |  | |
|  |  |  |  |  | 23 |  |  | |
|  |  |  |  |  | 25 |  |  | |
|  |  |  |  |  | 26 |  |  | |
|  |  |  |  |  | 27 |  |  | |
|  |  |  |  |  | 31 |  |  | |
|  |  |  |  |  | 31 |  |  | 
|  |  |  | 
               
                Page 
               
             | 
             | |||
|  |  |  |  | 1 |  |  | |
|  |  |  |  | 2 |  |  | |
|  |  |  |  | 3 |  |  | |
|  |  |  |  | 4 |  |  | |
|  |  |  |  | 6 |  |  | |
|  |  |  |  | 7 |  |  | |
|  |  |  |  | 8 |  |  | |
|  |  |  |  | 20 |  |  | |
|  |  |  |  | 23 |  |  | |
|  |  |  |  | 25 |  |  | |
|  |  |  |  | 26 |  |  | |
|  |  |  |  | 27 |  |  | |
|  |  |  |  | 31 |  |  | |
|  |  |  |  | 31 |  |  | |
| 
               
                Selling Shareholder 
               
             | 
             |  | 
               
                Shares Owned 
                 
            Prior to Offering  | 
             |  | 
               
                Shares That
                 
            May Be Offered  | 
             |  | 
               
                Shares Owned 
                 
            After Offering(1)  | 
             | 
| 
               
                Tracy W. Krohn(2)
               
             | 
             |  | 
               
                47,787,012
               
             | 
             |  | 
               
                48,299,141(3)
               
             | 
             |  | 
               
                0
               
             | 
             | 
|  | 
               
                Stifel
               
             | 
             |  | 
               
                Roth Capital Partners
               
             | 
             |