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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Revenue:        
Revenue $ 24,621 $ 21,578 $ 41,046 $ 40,940
Cost of Revenue:        
Cost of revenue 15,008 12,716 26,316 24,782
Gross profit 9,613 8,862 14,730 16,158
Operating expense:        
Research and development 14,910 15,664 30,395 31,975
Sales, general and administrative 19,083 14,943 38,849 29,877
Total operating expense 33,993 30,607 69,244 61,852
Operating loss (24,380) (21,745) (54,514) (45,694)
Interest expense (644) (598) (1,269) (1,179)
Other income (expense), net 428 (197) 863 154
Net loss (24,596) (22,540) (54,920) (46,719)
Other comprehensive income (loss):        
Unrealized income on investments 11 22 53 16
Comprehensive loss $ (24,585) $ (22,518) $ (54,867) $ (46,703)
Net loss per share:        
Basic and diluted net loss per share $ (0.16) $ (0.17) $ (0.36) $ (0.37)
Shares used in computing basic and diluted net loss per share 152,776 131,882 152,029 127,847
Product [Member]        
Revenue:        
Revenue $ 21,250 $ 18,485 $ 34,707 $ 34,767
Cost of Revenue:        
Cost of revenue 11,980 9,858 20,598 18,877
Service and Other [Member]        
Revenue:        
Revenue 3,371 3,093 6,339 6,173
Cost of Revenue:        
Cost of revenue $ 3,028 $ 2,858 $ 5,718 $ 5,905