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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, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Revenue        
Revenue $ 19,564 $ 21,370 $ 37,072 $ 40,635
Cost of goods sold        
Cost of goods sold 2,977 3,025 5,391 5,819
Gross profit        
Gross profit 16,587 18,345 31,681 34,816
Operating expenses (28,254) (30,996) (57,207) (62,191)
Investment income 1,026 1,526 2,174 3,174
Interest expense (1,284) (1,145) (2,547) (2,350)
Loss on debt extinguishment 0 0 0 (1,962)
Other income (expense), net 24 (44) (115) (50)
Loss before income taxes (11,901) (12,314) (26,014) (28,563)
Surgical Glaucoma        
Revenue        
Revenue 19,231 20,244 36,345 38,501
Cost of goods sold        
Cost of goods sold 2,772 2,423 5,070 4,632
Gross profit        
Gross profit 16,459 17,821 31,275 33,869
Dry Eye        
Revenue        
Revenue 333 1,126 727 2,134
Cost of goods sold        
Cost of goods sold 205 602 321 1,187
Gross profit        
Gross profit $ 128 $ 524 $ 406 $ 947