$Fuel Tech (FTEK.US)$Revenue has been fluctuating and declin...

$Fuel Tech (FTEK.US)$Revenue has been fluctuating and declining over the past 5 years, while operating profit has been narrowing its losses. Net income has been in a deficit for 3 years, with a balance of profits and losses for 2 years. In the first three quarters of 2022, revenue increased by 11.9%. However, both operating profit and net income have entered a small loss again. Currently, there is no visible investment value.