Tenant broke lease

[Exavier Martinez]

So I am currently house hacking. One of the tenants I had signed a 3 month lease. After the second month he just up and disappeared. No warning, no heads up, nothing. In the lease there was an agreement that if it was terminated early it would cost him $1000. How do I go about receiving these funds? Or what are the next steps I have to take? Do I just eat the loss? Any information would be greatly appreciated.