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Omeclamox®-Pak, Ethyol®, RediTrex®, Totect® and Vibativ® - Narrative (Details) - USD ($) shares in Thousands		1 Months Ended	12 Months Ended
	Oct. 29, 2013	Nov. 30, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Payments for asset acquisitions			$ 2,300,000
Revenue from Contract with Customer, Excluding Assessed Tax			40,200,832	$ 40,376,563	$ 32,478,185
Other revenue, potential upfront payment related to product sales			4,600,000
Payments to acquire businesses			20,000,000	0	0
Amended International Agreement | Pernix Therapeutics
Business Acquisition [Line Items]
Other revenue, potential upfront payment related to product sales	$ 4,000,000.0		2,300,000
Omeclamox-Pak
Business Acquisition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			600,000	1,800,000
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			1,100,000	1,300,000
Omeclamox-Pak
Business Acquisition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			623,297	1,761,868	2,536,027
Ethyol
Business Acquisition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			$ 10,545,906	$ 10,835,038	$ 838,386
Restricted Stock | Methotrexate
Business Acquisition [Line Items]
Stock issued during period, acquisitions (in shares)		180

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