Subsequent Events (Narrative) (Detail) (USD $)				1 Months Ended		6 Months Ended
	Aug. 01, 2013	Jun. 28, 2013 Additional Loan [Member] Wellstat Diagnostics [Member]	Jun. 30, 2013 Additional Loan [Member] Merus Labs [Member]	Feb. 28, 2013 Credit Agreement [Member] Wellstat Diagnostics [Member]	Jan. 31, 2013 Credit Agreement [Member] Wellstat Diagnostics [Member]	Jun. 30, 2013 Credit Agreement [Member] Wellstat Diagnostics [Member]	Nov. 02, 2012 Credit Agreement [Member] Wellstat Diagnostics [Member]	Jul. 31, 2012 Credit Agreement [Member] Merus Labs [Member]
Subsequent Event [Line Items]
Letter of credit extended								$ 20,000,000
Interest rate of note receivable (in Percent)			14.00%
Aggregate February 2015 Notes principal retired	1,000,000
Aggregate February 2015 Notes exhanged for Series 2012 Notes	1,000,000
Aggregate February 2015 Note principal remaining outstanding	0
Convertible Debt	180,000,000
Proceeds received under remedies available for borrower's breach of terms credit agreement					8,100,000
Amount company has agreed to advance under credit agreement				7,900,000		7,300,000
Forbearance period under terms of credit agreement (in Duration)				120 days
Financing Receivable, Gross		$ 1,300,000					$ 40,000,000