This excerpt taken from the KONA 10-K filed Mar 23, 2006.
Cash and Cash Equivalents
Cash and cash equivalents consist of cash, money market funds, and highly liquid short-term fixed income securities with a remaining maturity of 90 days or less when acquired. Amounts receivable from credit card processors are also considered cash equivalents because they are both short-term and highly liquid in nature and are typically converted to cash within one day of the sales transaction. Concentration of credit risk is limited by diversifying cash deposits among a variety of high credit-quality issuers.