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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Revenue:        
Revenue $ 21,915 $ 18,160 $ 62,961 $ 59,100
Cost of Revenue:        
Cost of revenue 15,001 14,968 41,317 39,750
Gross profit 6,914 3,192 21,644 19,350
Operating expense:        
Research and development 14,962 14,356 45,357 46,331
Sales, general and administrative 20,066 13,506 58,915 43,383
Total operating expense 35,028 27,862 104,272 89,714
Operating loss (28,114) (24,670) (82,628) (70,364)
Interest expense (664) (616) (1,933) (1,795)
Other income (expense), net (345) 242 518 396
Net loss (29,123) (25,044) (84,043) (71,763)
Other comprehensive income (loss):        
Unrealized income (loss) on investments (6) (8) 47 8
Comprehensive loss $ (29,129) $ (25,052) $ (83,996) $ (71,755)
Net loss per share:        
Basic and diluted net loss per share $ (0.19) $ (0.19) $ (0.55) $ (0.55)
Shares used in computing basic and diluted net loss per share 152,983 135,130 152,351 130,302
Product [Member]        
Revenue:        
Revenue $ 18,484 $ 15,150 $ 53,191 $ 49,917
Cost of Revenue:        
Cost of revenue 12,188 12,250 32,786 31,127
Service and Other [Member]        
Revenue:        
Revenue 3,431 3,010 9,770 9,183
Cost of Revenue:        
Cost of revenue $ 2,813 $ 2,718 $ 8,531 $ 8,623