Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Short-term Debt [Line Items]
Other Current Liabilities	$ 23,891	$ 17,962
Salaries, bonuses and related expenses
Short-term Debt [Line Items]
Other Current Liabilities	6,885	4,086
Selling and marketing expense accrual
Short-term Debt [Line Items]
Other Current Liabilities	4,158	721
Reserve for Purchase and Other Contractual Commitments
Short-term Debt [Line Items]
Other Current Liabilities	3,983	345
Severance
Short-term Debt [Line Items]
Other Current Liabilities	1,724	1,006
Accrued Royalties
Short-term Debt [Line Items]
Other Current Liabilities	1,368	1,783
Returned Product Liability
Short-term Debt [Line Items]
Other Current Liabilities	1,139	1,087
Allowance for Product Returns
Short-term Debt [Line Items]
Other Current Liabilities	887	852
Legal and professional fees
Short-term Debt [Line Items]
Other Current Liabilities	598	2,776
Manufacturing and technology transfer services
Short-term Debt [Line Items]
Other Current Liabilities	505	2,577
Other
Short-term Debt [Line Items]
Other Current Liabilities	$ 2,644	$ 2,729