| 
           Royalty Liability (Details Textual) (USD $) 
        In Millions, unless otherwise specified  | 
        1 Months Ended | |||
|---|---|---|---|---|
| 
           Mar. 31, 2013 
         | 
        
           Nov. 30, 2011 
         | 
        
           Mar. 15, 2011 
         | 
        
           Nov. 14, 2011 
         | 
      |
| Royalty Liability (Additional Textual) [Abstract] | ||||
| Royalty liability | $ 3.0 | $ 5.0 | ||
| Percentage of aggregate royalties on net sales | 2.50% | |||
| Royalty rights | 40.0 | |||
| Effective annual interest rate on loan | 51.00% | |||
| Percentage of royalty on net sales to third party | 2.50% | |||
| Percentage of royalties above threshold | 40.00% | |||
| Percentage of retain royalties on net sales above threshold | 60.00% | |||
| Gains on extinguishment of royalty liability | $ 9.0 | |||
| 
           Minimum [Member] 
         | 
        ||||
| Royalty Liability (Textual) [Abstract] | ||||
| Percentage of royalty on net sales to third party | 5.50% | |||
| 
           Maximum [Member] 
         | 
        ||||
| Royalty Liability (Textual) [Abstract] | ||||
| Percentage of royalty on net sales to third party | 7.50% | |||