Schedule of Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Short-term Debt [Line Items]
Other current liabilities	$ 21,516	$ 17,962
Salaries, bonuses and related expenses
Short-term Debt [Line Items]
Other current liabilities	6,260	4,086
Reserve for inventory purchase and other contractual commitments
Short-term Debt [Line Items]
Other current liabilities	5,174	345
Accrued Royalties
Short-term Debt [Line Items]
Other current liabilities	1,634	1,783
Selling and marketing expense accruals
Short-term Debt [Line Items]
Other current liabilities	1,447	721
Returned Product Liability
Short-term Debt [Line Items]
Other current liabilities	1,139	1,087
Manufacturing and technology transfer services
Short-term Debt [Line Items]
Other current liabilities	839	2,577
Legal and professional fees
Short-term Debt [Line Items]
Other current liabilities	720	2,776
Severance
Short-term Debt [Line Items]
Other current liabilities	683	1,006
Allowance for Product Returns
Short-term Debt [Line Items]
Other current liabilities	525	852
Allowance for product rebates & other chargebacks
Short-term Debt [Line Items]
Other current liabilities	239	339
Other
Short-term Debt [Line Items]
Other current liabilities	$ 2,856	$ 2,390