How much is the Citi Bike stolen fee?

Excuse me, could you please clarify for me what exactly the Citi Bike stolen fee entails? I'm curious about the amount that would be charged if one's bike were to be unfortunately stolen while in use. Is there a specific amount that's typically assessed, or does it vary depending on certain factors? Additionally, is there any insurance coverage available that could potentially mitigate or cover the cost of such a fee? Thank you for your time and assistance in addressing my inquiry.