| Royalty Liability (Details Textual) (USD $) In Millions, unless otherwise specified | 1 Months Ended | |||
|---|---|---|---|---|
| Mar. 28, 2013 | Nov. 30, 2011 | Mar. 15, 2011 | Nov. 14, 2011 | |
| Royalty Liability [Line Items] | ||||
| Royalty liability | $ 3.0 | $ 5.0 | ||
| Percentage of aggregate royalties on net sales | 2.50% | |||
| Royalty rights | 40.0 | |||
| 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 Losses On Extinguishment Of Royalty Liability | $ 9.0 | |||
| Minimum [Member] | ||||
| Royalty Liability [Line Items] | ||||
| Percentage of royalty on net sales to third party | 5.50% | |||
| Maximum [Member] | ||||
| Royalty Liability [Line Items] | ||||
| Percentage of royalty on net sales to third party | 7.50% | |||