As mentioned above, your employer has a reasonable amount of time, or a set time period, governed by state law, to give you your final paycheck. If that date or a reasonable amount of time has passed, then you should contact a government agency and/or a lawyer in your area to help you determine how to proceed. If you are only owed the amount of your last paycheck, the amount may be too small for a lawyer to pursue a case against your employer on your behalf, but there are federal and state government agencies that can help you, even if you do not have a lawyer.
If you do not get the help you need from the agencies you contact, small claims court is also an option. Because of the small amount of money involved, you may be able to pursue a claim against your employer more quickly and inexpensively in small claims court, and you may not need a lawyer.