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Vaprisol and Omeclamox-Pak - Narrative (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Oct. 29, 2013 | Apr. 30, 2015 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Feb. 28, 2014
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net product revenue |  |  |  |  |  |  |  |  |  |  | $ 33,013,184 | $ 36,683,762 | $ 31,100,698 |
Other revenue, potential upfront payment related to product sales |  |  |  |  |  |  |  |  |  |  | 4,700,000 |  |  |
Net revenues |  |  | $ 8,037,488 | $ 7,885,048 | $ 8,909,741 | $ 8,686,774 | $ 9,329,412 | $ 9,729,047 | $ 9,750,168 | $ 8,093,244 | 33,519,051 | 36,901,871 | $ 32,027,462 |
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 revenues |  |  |  |  |  |  |  |  |  |  | $ 3,000,000 | $ 4,100,000 |  |
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% |  |  |  |  |  |  |  |  |  |  |  |  |

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