Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended												6 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Jun. 28, 2010	Dec. 31, 2013 Contract Quarter	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of Significant Accounting Policies [Abstract]
Ownership interest in joint venture (in hundredths)	50.00%													50.00%
Restricted cash	$ 2,700,000				$ 3,200,000									$ 2,700,000	$ 3,200,000
Number of quarters in trend basis														6
Estimated % of wholesaler inventory that will be subject to contractual price agreements (in hundredths)	90.00%	90.00%	90.00%	90.00%	90.00%	95.00%	98.50%	98.50%	98.50%	98.50%	98.50%	98.50%
Chargeback and rebate expense														183,400,000	112,200,000	68,100,000
Allowance for chargebacks and rebates	12,900,000				13,500,000									12,900,000	13,500,000
Net expense for product returns														5,000,000	3,800,000	2,700,000
Allowance for potential product returns														8,200,000	8,400,000
Provisions for coupons and promotions														4,500,000	3,000,000	1,900,000
Reserve for coupons and promotions	700,000				800,000									700,000	800,000
Net provision for doubtful accounts														100,000	100,000	100,000
Past due gross accounts receivable	6,100,000													6,100,000
60 days past due gross accounts receivable	800,000													800,000
Provision for inventory obsolescence														2,100,000	2,400,000	600,000
Allowance for inventory obsolescence	2,950,000				2,244,000				1,239,000					2,950,000	2,244,000	1,239,000	1,612,000
Research and development inventory reserve														1,000,000
Reserve for inventory of products not yet FDA approved					800,000										800,000
Finite-Lived Intangible Assets [Line Items]
Amortization expense														7,422,000	6,870,000	1,733,000
Intangible assets and weighted-average remaining amortization period [Abstract]
Gross Carrying Amount	169,598,000													169,598,000
Accumulated Amortization	(39,093,000)				31,900,000									(39,093,000)	31,900,000
Net Carrying Amount	130,505,000													130,505,000
Changes in intangible assets [Roll Forward]
Amortization														7,422,000	6,870,000	1,733,000
Ending Balance	130,505,000													130,505,000
Changes in goodwill [Roll Forward]
Beginning Balance				32,159,000				11,863,000						32,159,000	11,863,000
Acquisitions														0	22,613,000
Impairments	0													0	0
Foreign currency translation														(2,328,000)	(2,317,000)
Ending Balance	29,831,000				32,159,000				11,863,000					29,831,000	32,159,000	11,863,000
Amortization expense of acquired intangible assets [Abstract]
2014	15,996,000													15,996,000
2015	15,388,000													15,388,000
2016	14,862,000													14,862,000
2017	14,345,000													14,345,000
2018	14,262,000													14,262,000
Property, Plant and Equipment [Line Items]
Depreciation														7,100,000	4,600,000	3,500,000
Anti-dilutive shares excluded from computation of diluted net income (loss) per share (in shares)														975,000	581,000	1,560,000
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	34,178,000				40,781,000									34,178,000	40,781,000
Foreign currency forward contracts	208,000													208,000
Total assets	34,386,000				40,781,000									34,386,000	40,781,000
Purchase consideration payable	14,728,000				14,208,000									14,728,000	14,208,000
Total liabilities	14,728,000				14,208,000									14,728,000	14,208,000
Underlying obligation of purchase consideration									15,000,000							15,000,000
Initial value of purchase consideration									11,300,000							11,300,000
Original discount rate used (in hundredths)														10.00%
Corrected value of long term obligation														14,700,000	14,200,000	11,600,000
Assumed discount rate (in hundredths)														9.00%
Discount rate (in hundredths)														1.85%	2.75%
Non-cash interest expense															2,600,000
Percentage of likelihood of purchase consideration becoming payable (in hundredths)	100.00%													100.00%
Number of non-deliverable forward contracts														3
Future anticipated investments														3,300,000
Long-term investments	10,006,000				10,299,000									10,006,000	10,299,000
Purchase consideration payable, current	14,728,000				0									14,728,000	0
Class of Warrant or Right [Line Items]
Original fair value of warrant													17,900,000
Assumptions used in estimating fair value of warrants [Abstract]
Expected Volatility (in hundredths)													79.70%
Risk-free interest rate (in hundredths)													1.80%
Dividend yield (in hundredths)													0.00%
Warrants Granted (in shares)	7,192,313													7,192,313
Fair Value	17,946,000													17,946,000
Product warranty expiration period														10 years
Modification Warrants [Member]
Assumptions used in estimating fair value of warrants [Abstract]
Grant Date														Apr. 13, 2009
Warrants Granted (in shares)	1,939,639													1,939,639
Exercise price (in dollars per share)	$ 1.11													$ 1.11
Fair Value	4,829,000													4,829,000
Reimbursement Warrants [Member]
Assumptions used in estimating fair value of warrants [Abstract]
Grant Date														Apr. 13, 2009
Warrants Granted (in shares)	1,501,933													1,501,933
Exercise price (in dollars per share)	$ 1.11													$ 1.11
Fair Value	3,740,000													3,740,000
Credit Facility Warrants [Member]
Assumptions used in estimating fair value of warrants [Abstract]
Grant Date														Aug. 17, 2009
Warrants Granted (in shares)	1,650,806													1,650,806
Exercise price (in dollars per share)	$ 1.16													$ 1.16
Fair Value	4,127,000													4,127,000
Subordinated Note Warrants [Member]
Assumptions used in estimating fair value of warrants [Abstract]
Grant Date														Aug. 17, 2009
Warrants Granted (in shares)	2,099,935													2,099,935
Exercise price (in dollars per share)	$ 1.16													$ 1.16
Fair Value	5,250,000													5,250,000
Kapoor Warrants [Member]
Class of Warrant or Right [Line Items]
Fair value of warrants using Black-Scholes valuation model, minimum (in dollars per share)													$ 2.49
Fair value of warrants using Black-Scholes valuation model, maximum (in dollars per share)													$ 2.50
Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of forward contract	200,000													200,000
Quoted Prices in Active Markets for Identical Items (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	34,178,000				40,781,000									34,178,000	40,781,000
Foreign currency forward contracts	0													0
Total assets	34,178,000				40,781,000									34,178,000	40,781,000
Purchase consideration payable	0				0									0	0
Total liabilities	0				0									0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0				0									0	0
Foreign currency forward contracts	208,000													208,000
Total assets	208,000				0									208,000	0
Purchase consideration payable	0				0									0	0
Total liabilities	0				0									0	0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0				0									0	0
Foreign currency forward contracts	0													0
Total assets	0				0									0	0
Purchase consideration payable	14,728,000				14,208,000									14,728,000	14,208,000
Total liabilities	14,728,000				14,208,000									14,728,000	14,208,000
Buildings [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life														30 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life														18 years
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life														10 years
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life														5 years
Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life														5 years
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets														4 years
Assumptions used in estimating fair value of warrants [Abstract]
Expected Life (in years)													3 years 9 months 18 days
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets														30 years
Assumptions used in estimating fair value of warrants [Abstract]
Expected Life (in years)													4 years 1 month 6 days
Product Licensing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense														(5,723,000)	(5,268,000)
Intangible assets and weighted-average remaining amortization period [Abstract]
Gross Carrying Amount	151,504,000													151,504,000
Accumulated Amortization	(35,604,000)													(35,604,000)
Net Carrying Amount	115,900,000				63,654,000									115,900,000	63,654,000
Weighted Average Remaining Amortization Period														9 years 9 months 18 days
Changes in intangible assets [Roll Forward]
Beginning Balance				63,654,000				67,822,000						63,654,000	67,822,000
Acquisitions														57,969,000	1,100,000
Amortization														(5,723,000)	(5,268,000)
Foreign currency translation														0	0
Ending Balance	115,900,000				63,654,000									115,900,000	63,654,000
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense														(316,000)	(317,000)
Intangible assets and weighted-average remaining amortization period [Abstract]
Gross Carrying Amount	9,500,000													9,500,000
Accumulated Amortization	(844,000)													(844,000)
Net Carrying Amount	8,656,000				8,972,000									8,656,000	8,972,000
Weighted Average Remaining Amortization Period														27 years 4 months 24 days
Changes in intangible assets [Roll Forward]
Beginning Balance				8,972,000				9,289,000						8,972,000	9,289,000
Acquisitions														0	0
Amortization														(316,000)	(317,000)
Foreign currency translation														0	0
Ending Balance	8,656,000				8,972,000									8,656,000	8,972,000
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense														(740,000)	(705,000)
Intangible assets and weighted-average remaining amortization period [Abstract]
Gross Carrying Amount	6,166,000													6,166,000
Accumulated Amortization	(1,528,000)													(1,528,000)
Net Carrying Amount	4,638,000				5,588,000									4,638,000	5,588,000
Weighted Average Remaining Amortization Period														9 years 9 months 18 days
Changes in intangible assets [Roll Forward]
Beginning Balance				5,588,000				3,727,000						5,588,000	3,727,000
Acquisitions														0	2,560,000
Amortization														(740,000)	(705,000)
Foreign currency translation														(210,000)	6,000
Ending Balance	4,638,000				5,588,000									4,638,000	5,588,000
Non-Compete [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense														(643,000)	(580,000)
Intangible assets and weighted-average remaining amortization period [Abstract]
Gross Carrying Amount	2,428,000													2,428,000
Accumulated Amortization	(1,117,000)													(1,117,000)
Net Carrying Amount	1,311,000				2,171,000									1,311,000	2,171,000
Weighted Average Remaining Amortization Period														2 years 2 months 12 days
Changes in intangible assets [Roll Forward]
Beginning Balance				2,171,000				0						2,171,000	0
Acquisitions														0	2,743,000
Amortization														(643,000)	(580,000)
Foreign currency translation														(217,000)	8,000
Ending Balance	$ 1,311,000				$ 2,171,000									$ 1,311,000	$ 2,171,000