Schedule of Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Short-term Debt [Line Items]
Other current liabilities	$ 16,719	$ 21,516
Reserve for inventory purchase and other contractual commitments
Short-term Debt [Line Items]
Other current liabilities	3,821	5,174
Salaries, bonuses and related expenses
Short-term Debt [Line Items]
Other current liabilities	3,101	6,260
Severance
Short-term Debt [Line Items]
Other current liabilities	2,797	683
Returned product liability
Short-term Debt [Line Items]
Other current liabilities	1,139	1,139
Accrued royalties
Short-term Debt [Line Items]
Other current liabilities	845	1,634
Legal and professional fees
Short-term Debt [Line Items]
Other current liabilities	762	720
Allowance for product rebates & other chargebacks
Short-term Debt [Line Items]
Other current liabilities	682	239
Manufacturing and technology transfer services
Short-term Debt [Line Items]
Other current liabilities	625	839
Allowance for product returns
Short-term Debt [Line Items]
Other current liabilities	428	525
Selling and marketing expense accruals
Short-term Debt [Line Items]
Other current liabilities	388	1,447
Other
Short-term Debt [Line Items]
Other current liabilities	$ 2,131	$ 2,856