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Segment Information - Summary of Operating Result Information for Each Reportable Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Revenue        
Revenue $ 20,009 $ 18,677 $ 62,305 $ 50,788
Cost of goods sold        
Cost of goods sold 2,677 2,928 9,105 8,696
Gross profit        
Gross profit 17,332 15,749 53,200 42,092
Operating expense 30,743 37,594 99,364 108,993
Loss from operations (13,411) (21,845) (46,164) (66,901)
Interest expense (1,432) (1,131) (4,057) (3,243)
Other income (expense), net 1,886 766 5,465 846
Loss before income tax (12,957) (22,210) (44,756) (69,298)
Surgical Glaucoma        
Revenue        
Revenue 18,425 17,072 57,158 46,842
Cost of goods sold        
Cost of goods sold 2,002 1,932 6,808 5,372
Gross profit        
Gross profit 16,423 15,140 50,350 41,470
Dry Eye        
Revenue        
Revenue 1,584 1,605 5,147 3,946
Cost of goods sold        
Cost of goods sold 675 996 2,297 3,324
Gross profit        
Gross profit $ 909 $ 609 $ 2,850 $ 622