• Filing Date: 2020-08-04
  • Form Type: 10-Q
  • Description: Quarterly report
v3.20.2
License Agreements (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Dec. 12, 2018
Jul. 10, 2017
Jul. 01, 2017
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
pSivida                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Collaborative arrangement, royalty payable on net revenue, percentage 6.00%   2.00%          
Collaborative arrangement, royalty payable on net revenue over threshold, percentage   2.00%            
Collaborative arrangement, royalty payable on net revenue, revenue threshold   $ 75,000,000            
Collaborative arrangement, forgiveness of future offset, additional amount       $ 5,000,000        
New Collaboration Agreement, 2017 Second Amended                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Royalty expense         $ 401,000 $ 434,000 $ 982,000 $ 950,000
Accrued royalty expense         401,000   401,000  
Maximum | pSivida                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Recoverable amount to offset future royalty payments   $ 15,000,000     $ 8,367,000   $ 8,367,000