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Accounts Payable And Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Accounts Payable And Accrued Liabilities [Abstract]
Accounts payable	$ 2,857	$ 2,417
Accrued compensation	2,497	3,235
Accrued clinical trial expense	325	31
Accrued rebates and sales discounts	3,161	2,626
Allowance for product returns	11,909	9,843
Accrued contract sales organization fees	3,560	3,365
Other accrued liabilities	5,859	5,267
Accounts Payable and Accrued Liabilities, Current, Total	$ 30,168	$ 26,784

Carrying value as of the balance sheet date of obligations incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details