10 Revenue: Sales of fuel cell systems and related infrastructure $ 20,622 $ 8,560 $ 32,080 $ 10,757 Services performed on fuel cell systems and related infrastructure 7,188 5,049 13,786 10,198 Power Purchase Agreements 5,629 4,945 11,118 9,256 Fuel delivered to customers 6,488 3,986 12,023 7,477 Other — 64 — 151 Gross revenue 39,927 22,604 69,007 37,839 Provision for common stock warrants (3,921) (1,820) (5,806) (1,820) Net revenue 36,006 20,784 63,201 36,019 Cost of revenue: Sales of fuel cell systems and related infrastructure 15,377 6,441 25,499 8,727 Services performed on fuel cell systems and related infrastructure 7,125 5,068 13,995 11,634 Power Purchase Agreements 9,393 7,450 17,684 14,065 Fuel delivered to customers 6,421 5,303 12,317 9,452 Other — 65 — 163 Total cost of revenue 38,316 24,327 69,495 44,041 Gross loss (2,310) (3,543) (6,294) (8,022) Operating expenses: Research and development 8,427 6,625 17,075 12,623 Selling, general and administrative 12,241 17,904 20,550 27,049 Total operating expenses 20,668 24,529 37,625 39,672 Operating loss (22,978) (28,072) (43,919) (47,694) Interest and other expense, net (6,136) (2,251) (9,241) (4,388) Change in fair value of common stock warrant liability 334 (12,296) 1,592 (14,576) Loss before income taxes $ (28,780) $ (42,619) $ (51,568) $ (66,658) Income tax benefit 2,912 — 5,865 — Net loss attributable to the Company $ (25,868) $ (42,619) $ (45,703) $ (66,658) Preferred stock dividends declared and accretion of discount (13) (26) (26) (3,061) Net loss attributable to common shareholders $ (25,881) $ (42,645) $ (45,729) $ (69,719) Net loss per share: Basic and diluted $ (0.12) $ (0.19) $ (0.21) $ (0.34) Weighted average number of common shares outstanding 214,315,312 220,310,678 220,650,537 205,748,184 Plug Power Inc. and Subsidiaries Consolidated Statements of Operations (In thousands, except share and per share amounts) (Unaudited) 2018 2017 2018 2017 Three Months Ended Six Months Ended June 30, June 30, |