Litigation, Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies Disclosure [Line Items]
Letter Of Credit Reimbursement Agreements	$ 3,800,000	$ 3,800,000	$ 2,200,000
Professional Fees		300,000
Product selling price	9,400,000
Operating lease term	3 years
Financing lease obligation	3,900,000	3,291,000	0	0
Period of time in which remaining purchase price is expected to be paid		2 years
Property, plant and equipment, net	44,327,000	44,327,000	47,086,000
Operating Leases, Rent Expense		10,700,000	10,600,000	10,100,000
Operating Leases, Future Minimum Payments Receivable, Current	1,400,000	1,400,000
Capitalized Legal Patent Costs	7,500,000	7,500,000	7,400,000
Carrying Amount Of Assets Subject to Financing Lease Obligation
Commitments and Contingencies Disclosure [Line Items]
Property, plant and equipment, net	$ 5,500,000	$ 5,500,000