Yep, that's my understanding -- it's basically "we spent $xx,xxx training you, then you left. We think you owe us $yy,yyy."

That being said, it's a company of humans. What good is a developer who's shackled to their desk while a spouse is distressed in another state? None. There will be a way to work it out. We want you to be happy and great at building software, not imprisoned.