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Organization and Basis of Presentation - Additional Information (Details)
$ in Thousands
3 Months Ended 12 Months Ended
May 11, 2020
state
Mar. 31, 2020
USD ($)
segment
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Number of operating segments | segment   1    
Number of states that have initiated re-ordering of OMIDRIA from wholesalers | state 36      
Cash, cash equivalents and marketable securities   $ 54,000    
Operating loss   23,677 $ 19,239 $ 63,400
Net cash used in operating activities   $ 9,141 $ 12,948 $ 60,100
Line of Credit Agreement        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Borrowing option - percentage of eligible accounts receivable   85.00%    
Borrowing capacity   $ 50,000