Schedule of Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Short-term Debt [Line Items]
Other current liabilities	$ 14,115	$ 21,516
Reserve for inventory purchase and other contractual commitments
Short-term Debt [Line Items]
Other current liabilities	4,056	5,174
Salaries, bonuses and related expenses
Short-term Debt [Line Items]
Other current liabilities	3,355	6,260
Returned Product Liability
Short-term Debt [Line Items]
Other current liabilities	1,139	1,139
Manufacturing and technology transfer services
Short-term Debt [Line Items]
Other current liabilities	547	839
Allowance for Product Returns
Short-term Debt [Line Items]
Other current liabilities	514	525
Accrued Royalties
Short-term Debt [Line Items]
Other current liabilities	489	1,634
Legal and professional fees
Short-term Debt [Line Items]
Other current liabilities	472	720
Selling and marketing expense accruals
Short-term Debt [Line Items]
Other current liabilities	461	1,447
Severance
Short-term Debt [Line Items]
Other current liabilities	401	683
Allowance for product rebates & other chargebacks
Short-term Debt [Line Items]
Other current liabilities	262	239
Other
Short-term Debt [Line Items]
Other current liabilities	$ 2,419	$ 2,856