Jacques,
I don't live in Idaho so I can't do any leg-work for you there, but I spent a few minutes looking for some info to help you get started. Here are a couple of links to the court and a legal aid organization in Boise (Meridian is in Ada County; Boise is the county seat). It looks like you may be able to file a small claims case online.
http://www.adaweb.net/CourtAssistanceOffice.aspx
http://www.idaholegalaid.org/SelfHelp/SmallClaims
Bonne chance!