explaining the operating expense trend

Dec-17 Dec-18 Dec-19 Dec-20 Trend 2018 Trend 2019 Trend 2020 177,866,000 232,887,000 280,522,000 386,064,000 30.93% 20.45% 37.62% Revenues Revenues Operating expenses Sales and marketing Research and development General and administrative Other operating expenses Total operating expenses 10,069,000 13,814,000 18,878,000 22,620,000 28,837,000 35,931,000 3,674,000 4,336,000 5,203,000 214,000 296,000 201,000 36,577,000 47,283,000 60,213,000 22,008,000 42,740,000 6,668,000 (75,000) 71,341,000 37.19% 27.48% 18.02% 38.32% 29.27% 36.66% 24.60% 20.00% -32.09% 27.35% 16.58% 18.95% 28.16% -137.31% 18.48%