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Segment Information - Summary of Operating Result Information for Each Reportable Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Revenue        
Revenue $ 23,471 $ 17,229 $ 42,296 $ 32,111
Cost of goods sold        
Cost of goods sold 3,381 2,736 6,429 5,768
Gross profit        
Gross profit 20,090 14,493 35,867 26,343
Operating expense 35,277 37,357 68,621 71,399
Loss from operations (15,187) (22,864) (32,754) (45,056)
Interest expense (1,349) (1,065) (2,625) (2,112)
Other income (expense), net 1,790 95 3,580 80
Loss before income tax (14,746) (23,834) (31,799) (47,088)
Surgical Glaucoma        
Revenue        
Revenue 21,398 15,899 38,733 29,770
Cost of goods sold        
Cost of goods sold 2,444 1,949 4,806 3,440
Gross profit        
Gross profit 18,954 13,950 33,927 26,330
Dry Eye        
Revenue        
Revenue 1,136 543 1,940 13
Cost of goods sold        
Cost of goods sold 937 787 1,623 2,328
Gross profit        
Gross profit $ 2,073 $ 1,330 $ 3,563 $ 2,341