Notes and Other Long-term Receivables (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			1 Months Ended					1 Months Ended						1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jan. 31, 2013 Wellstate Credit Agreement [Member]	Dec. 31, 2012 Wellstate Credit Agreement [Member]	Nov. 02, 2012 Wellstate Credit Agreement [Member]	Aug. 31, 2012 Wellstate Credit Agreement [Member]	Mar. 31, 2012 Wellstate Credit Agreement [Member]	Jul. 31, 2012 Merus Labs [Member]	Oct. 31, 2012 AxoGen [Member]	Feb. 28, 2013 Hyperion Purchase and Sale Agreement Receivable [Member]	Mar. 31, 2012 Hyperion Purchase and Sale Agreement Receivable [Member]	Jul. 31, 2012 Initial Loan [Member] Merus Labs [Member]	Jul. 31, 2012 Additional Loan [Member] Merus Labs [Member]	Mar. 31, 2012 Senior Secured Note Receivable [Member] Wellstat Note Receivable [Member]	Dec. 31, 2012 Senior Secured Note Receivable [Member] Wellstat Note Receivable [Member]	Aug. 31, 2012 Senior Secured Note Receivable [Member] Wellstat Note Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, gross						$ 40,000									$ 7,500		$ 10,000
Term of receivable (in Duration)															2 years
Increase (decrease) in finance receivables									20,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred									35,000
Interest rate of note receivable (in Percent)													13.50%	14.00%
Letter of credit extended									20,000
Term of Royalty Agreement (in Duration)										8 years
First year of contract, AxoGen has the right to call (in Year)										5
Last year of contract, AxoGen has the right to call (in Year)										8
Total consideration paid to AxoGen for the royalty rights										20,800
Initial interim funding for royalty rights										1,800
Note receivable, impairment evaluated																0
Proceeds received under remedies available for borrower's breach of terms credit agreement				8,100
Credit agreement, stated interest rate (in Percent)						5.00%	12.00%	10.00%
Amount company has agreed to advance under credit agreement					7,900
Repayment of notes receivable	5,000	0	0								1,200
Notes receivable, net	$ 7,504	$ 0									$ 1,200	$ 2,300