If you fail to submit a timely appeal, a certified copy of the award will be filed with the local superior court and then it will be enforceable like any other civil judgment. Interest will begin accruing at the legal rate of 10% until the judgment is paid. Company assets can be seized. If you are a sole proprietor, personal assets can be seized. Additional collection options are also available.
Ignoring this is an extremely bad idea. Pay the judgment or consult with a local attorney to determine whether an appeal is a viable option.
This answer is a general interpretation of the law and is not fact specific to your case. Likewise it does not create an attorney-client relationship. You should seek an attorney for a review of your specific facts and documents.
You should consider whether to appeal very carefully. If you appeal the labor commissioner's decision and still owe any money to the employee, you will be responsible for paying the employee's reasonable attorney's fees. This is true even if you reduce the amount owed. Thus, the appeal may cost you more than the original Labor Board decision.