Billions of dollars are lost every year to theft and embezzlement.  The vast majority of these crimes are, sadly, from within the company itself.  Small businesses are most vulnerable averaging losses of nearly $100,000 per incident.1  A single employee can bankrupt a small business and, if not acted upon quickly, the chances of recovering any losses decrease with time.
1. 2004 Report to the Nation on Occupational Fraud and Abuse.