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Vaprisol, Omeclamox-Pak, Ethyol, and Methotrexate - Narrative (Details) - USD ($) shares in Thousands		1 Months Ended		3 Months Ended								12 Months Ended
	Oct. 29, 2013	Nov. 30, 2016	Apr. 30, 2015	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Feb. 28, 2014
Business Acquisition [Line Items]
Net product revenue												$ 32,478,185	$ 33,013,184	$ 36,683,762
Net revenues				$ 9,081,440	$ 8,791,753	$ 7,414,835	$ 7,737,532	$ 8,037,488	$ 7,885,048	$ 8,909,741	$ 8,686,774	33,025,560	33,519,051	36,901,871
Other revenue, potential upfront payment related to product sales												4,700,000
Payments to acquire businesses												0	0	2,000,000
Amended International Agreement | Pernix Therapeutics
Business Acquisition [Line Items]
Other revenue, potential upfront payment related to product sales	$ 4,000,000
Vaprisol
Business Acquisition [Line Items]
Upfront payment															$ 2,000,000
Additional upfront payments															$ 2,000,000
Payments for contingent consideration			$ 1,700,000
Gain on contingent consideration												300,000
Acquired contingent liabilities				$ 100,000								100,000
Omeclamox-Pak
Business Acquisition [Line Items]
Additional upfront payments	$ 4,000,000
Net product revenue												2,500,000	3,000,000
Omeclamox-Pak | Minimum
Business Acquisition [Line Items]
Royalty payments based on percentage over gross profits	15.00%
Omeclamox-Pak | Maximum
Business Acquisition [Line Items]
Royalty payments based on percentage over gross profits	20.00%
Ethyol | Minimum
Business Acquisition [Line Items]
Royalty payments based on percentage over gross profits	30.00%
Ethyol | Maximum
Business Acquisition [Line Items]
Royalty payments based on percentage over gross profits	50.00%
Methotrexate
Business Acquisition [Line Items]
Payments to acquire businesses		$ 100,000
Liabilities incurred		900,000
Stock issued during period, acquisitions		$ 990,000
Vaprisol
Business Acquisition [Line Items]
Net product revenue												1,857,838	2,641,484	3,011,997
Product, Ethyol
Business Acquisition [Line Items]
Net product revenue												$ 838,386	$ 0	$ 0
Restricted Stock | Methotrexate
Business Acquisition [Line Items]
Stock issued during period, acquisitions (in shares)		180

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