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Omeclamox®-Pak, Ethyol®, Totect® and Methotrexate® - Narrative (Details) - USD ($) shares in Thousands		1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 29, 2013	Nov. 30, 2016	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Net product revenue				$ 40,376,563	$ 32,478,185	$ 33,013,184
Other revenue, potential upfront payment related to product sales				4,600,000
Amended International Agreement | Pernix Therapeutics
Business Acquisition [Line Items]
Other revenue, potential upfront payment related to product sales	$ 4,000,000
Omeclamox-Pak
Business Acquisition [Line Items]
Additional upfront payments	$ 4,000,000
Net product revenue				1,800,000	2,500,000
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				1,300,000	1,000,000
Omeclamox-Pak
Business Acquisition [Line Items]
Net product revenue				1,761,868	2,536,027	3,037,078
Product, Ethyol
Business Acquisition [Line Items]
Net product revenue				$ 10,835,038	$ 838,386	$ 0
Cardioxane
Business Acquisition [Line Items]
Net product revenue			$ 300,000
Restricted Stock | Methotrexate
Business Acquisition [Line Items]
Stock issued during period, acquisitions (in shares)		180

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