Accounts Receivable, Net and Revenue Concentrations (Details Textual) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Accounts Receivable, Net and Revenue Concentrations (Textual) [Abstract]
Allowance for Sales return	$ 0.4	$ 0.7
Percentage of net sales to one customer	10.00%		10.00%

The percentage of net product revenue to total net revenue from the sale of goods as of year end.

No definition available.

Name:	us-gaap_SalesRevenueGoodsNetPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant