Schedule of Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Short-term Debt [Line Items]
Other current liabilities	$ 16,956	$ 21,516
Salaries, bonuses and related expenses
Short-term Debt [Line Items]
Other current liabilities	4,178	6,260
Reserve for inventory purchase and other contractual commitments
Short-term Debt [Line Items]
Other current liabilities	3,771	5,174
Severance
Short-term Debt [Line Items]
Other current liabilities	2,192	683
Returned product liability
Short-term Debt [Line Items]
Other current liabilities	1,217	1,139
Accrued royalties
Short-term Debt [Line Items]
Other current liabilities	789	1,634
Legal and professional fees
Short-term Debt [Line Items]
Other current liabilities	1,605	720
Allowance for product rebates & other chargebacks
Short-term Debt [Line Items]
Other current liabilities	517	239
Manufacturing and technology transfer services
Short-term Debt [Line Items]
Other current liabilities	218	839
Allowance for product returns
Short-term Debt [Line Items]
Other current liabilities	406	525
Selling and marketing expense accruals
Short-term Debt [Line Items]
Other current liabilities	111	1,447
Other
Short-term Debt [Line Items]
Other current liabilities	$ 1,952	$ 2,856