Cash, Cash Equivalents and Investments
Cash equivalents represent highly liquid investments, with original maturities of 90 days or less, primarily in bank deposits, U.S. and U.K. treasury bill money market funds and commercial paper. Investments with longer maturities are classified as investments, and are held primarily in U.S. treasury bills, Canadian government U.S. dollar-denominated treasury bills and commercial paper, bank deposits and corporate debt securities.
Investments are classified as available-for-sale in accordance with the accounting standards for investments in debt and equity securities. All available-for-sale securities are recorded at fair market value and any unrealized holding gains and losses, to the extent deemed temporary, are included in accumulated other comprehensive income in stockholders' equity, net of the related tax effects. If any adjustment to fair value reflects a decline in the value of the investment, the Company considers all available evidence to evaluate the extent to which the decline is “other than temporary” and marks the investment to market through a charge to the statement of operations. The Company classifies its investments exclusive of those categorized as cash equivalents.