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Additions and Returns of Product Rights - Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended	6 Months Ended	24 Months Ended
	Nov. 30, 2018	Nov. 30, 2016	Mar. 31, 2021	Jun. 30, 2021	Sep. 30, 2021	Dec. 31, 2020	Jul. 31, 2020
Business Acquisition [Line Items]
Financial consideration received in exchange for product license rights, installment payments			$ 3,000,000.0
Clinigen
Business Acquisition [Line Items]
Discontinued operations income				$ 1,000,000.0
Clinigen | Scenario, Forecast
Business Acquisition [Line Items]
Financial consideration received in exchange for product license rights					$ 5,000,000
Vaprisol
Business Acquisition [Line Items]
Payment to acquire business upon closing	$ 20,000,000.0
Other Payments to Acquire Businesses	$ 5,000,000.0
Percentage of tiered royalty payments (up to)	20.00%
Additional liability				7,357,081		$ 8,200,552
Vaprisol | Other current liabilities
Business Acquisition [Line Items]
Additional liability				2,900,000
Vaprisol | Other long-term liabilities
Business Acquisition [Line Items]
Additional liability				4,500,000
Methotrexate
Business Acquisition [Line Items]
Payment to acquire business upon closing		$ 100,000
Additional liability						$ 1,000,000.0	$ 1,000,000.0
Liability recorded		$ 900,000
Vested common stock, value				900,000
Net intangible assets				$ 2,700,000
Methotrexate | Restricted Stock
Business Acquisition [Line Items]
Unvested restricted shares (in shares)		180,000

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