Options to collect unpaid rent

[Jasper Franklin Heilig]

Hello, we had a renter not pay their last months rent and will not answer calls, texts or emails. They did vacate the property. 
We now know to get first and last months rent… but what can I as the landlord do? Can I contact their employer? Can I report them to the credit bureaus? Or would that all happen in small claims court? 

Thanks for any advice