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Recent Additions and Expected Return of Product Rights - Change in Consideration (Details) - Vibativ - USD ($)
 2 Months Ended 6 Months Ended
Dec. 31, 2018
Dec. 31, 2018
Jun. 30, 2019
Loss Contingency Accrual [Roll Forward]      
Beginning balance $ 9,034,000   $ 9,502,000
Adjustment to initial fair value of the contingent consideration liability     148,000
Cash payment of royalty during the period     (684,738)
Change in fair value of contingent consideration included in operating expenses (40,000)   (321,894)
Contingent consideration earned and accrued in operating expenses   $ 508,000 423,041
Ending balance $ 9,502,000 $ 9,502,000 $ 9,066,409