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Recent Additions and Expected Return of Product Rights - Narrative (Details) - USD ($)
1 Months Ended 6 Months Ended 12 Months Ended 24 Months Ended
Apr. 30, 2019
Nov. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Sep. 30, 2021
Business Acquisition [Line Items]            
Payments for asset acquisitions         $ 2,300,000  
Payment to acquire business upon closing     $ 5,000,000 $ 0    
Agreement | Scenario, Forecast            
Business Acquisition [Line Items]            
Financial consideration received in exchange for product license rights           $ 5,000,000
Level 3            
Business Acquisition [Line Items]            
Current portion of the contingent consideration liability     2,100,000      
Noncurrent portion of the contingent consideration liability     7,000,000.0      
Vibativ            
Business Acquisition [Line Items]            
Payment to acquire business upon closing   $ 20,000,000.0 20,000,000      
Cash payment during early 2019 $ 5,000,000.0   $ 5,000,000      
Percentage of tiered royalty payments (up to)   20.00%