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Segment Information - Summary of Operating Result Information for Each Reportable Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Revenue    
Revenue $ 14,881 $ 8,635
Cost of goods sold    
Cost of goods sold 3,033 2,301
Gross profit    
Gross profit 11,848 6,334
Operating expense 34,041 17,990
Loss from operations (22,193) (11,656)
Interest expense (1,046) (1,084)
Other (expense) income, net (15) 552
Loss before income tax (23,254) (12,188)
Surgical Glaucoma    
Revenue    
Revenue 13,870 8,139
Cost of goods sold    
Cost of goods sold 1,491 1,858
Gross profit    
Gross profit 12,379 6,281
Dry Eye    
Revenue    
Revenue 1,011 496
Cost of goods sold    
Cost of goods sold 1,542 443
Gross profit    
Gross profit $ (531) $ 53