How did FTEK's revenue and expenses shift in Q4 2024?

Fuel Tech (FTEK) experienced a significant decline in revenue and a substantial increase in operating expenses in Q4 2024, leading to a substantial net loss of $1.88 million. |code|Ticker|Name|Date|Business Composition|Revenue By Business|market_code| |---|---|---|---|---|---|---| |FTEK|FTEK.O|Fuel Tech|20240101-2024|Other|0|186| |FTEK|FTEK.O|Fuel Tech|20240101-2024|Other|0|186| |FTEK|FTEK.O|Fuel Tech|20240101-2024|Other|0|186| |FTEK|FTEK.O|Fuel Tech|20240101-2024|Other|0|186| |FTEK|FTEK.O|Fuel Tech|20240101-2024|FUEL CHEM|2639000|186| |FTEK|FTEK.O|Fuel Tech|20240101-2024|Air Pollution Control|2318000|186| |FTEK|FTEK.O|Fuel Tech|20240101-2024|Other|0|186| |code|Ticker|Name|Date|Total Revenue YoY|Total Revenue|Net Income|market_code| |---|---|---|---|---|---|---|---| |FTEK|FTEK.O|Fuel Tech|2023 Q4|-9.628258082894174|6345000|-539000|186| |FTEK|FTEK.O|Fuel Tech|2024 Q1|-31.974749554000276|4957000|281000|186| |FTEK|FTEK.O|Fuel Tech|2024 Q2|28.950741622413478|7042000|-421000|186| |FTEK|FTEK.O|Fuel Tech|2024 Q3|-1.71507260891337|7851000|80000|186| |code|Ticker|Name|Date|Operating Expenses YoY|Total Revenue|Operating Expenses|market_code| |---|---|---|---|---|---|---|---| |FTEK|FTEK.O|Fuel Tech|2023 Q4||6345000||186| |FTEK|FTEK.O|Fuel Tech|2024 Q1||4957000||186| |FTEK|FTEK.O|Fuel Tech|2024 Q2||7042000||186| |FTEK|FTEK.O|Fuel Tech|2024 Q3||7851000||186|