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v3.21.2

Segment Information - Summary of Operating Result Information for Each Reportable Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Revenue |  |  |  |
Revenue | $ 13,101 | $ 8,651 | $ 34,271 | $ 18,649
Cost of goods sold |  |  |  |
Cost of goods sold | 2,062 | 2,620 | 6,668 | 6,833
Gross profit |  |  |  |
Gross profit | 11,039 | 6,031 | 27,603 | 11,816
Operating expense | (25,069) | (13,386) | (64,365) | (35,571)
Loss from operations | (14,030) | (7,355) | (36,762) | (23,755)
Interest income |  | 1 |  | 30
Interest expense | (1,122) | (538) | (3,288) | (1,639)
Other expense, net | (2,001) | (197) | (6,884) | 179
Loss before income tax | (17,153) | (8,089) | (46,934) | (25,543)
Surgical Glaucoma |  |  |  |
Revenue |  |  |  |
Revenue | 12,446 | 7,883 | 32,573 | 17,282
Cost of goods sold |  |  |  |
Cost of goods sold | 1,621 | 1,946 | 5,252 | 4,968
Gross profit |  |  |  |
Gross profit | 10,825 | 5,937 | 27,321 | 12,314
Dry Eye |  |  |  |
Revenue |  |  |  |
Revenue | 655 | 768 | 1,698 | 1,367
Cost of goods sold |  |  |  |
Cost of goods sold | 441 | 674 | 1,416 | 1,865
Gross profit |  |  |  |
Gross profit | $ 214 | $ 94 | $ 282 | $ (498)

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