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Note H - Marketable Securities
 3 Months Ended
Mar. 31, 2012
Marketable Securities [Text Block]

Note H – Marketable Securities


Marketable securities consist primarily of corporate bonds with maturities greater than three months and up to ten years at the time of purchase. These securities, which are classified as available-for-sale, are carried at fair value, with unrealized gains and losses, net of any tax effect, reported in stockholders’ equity as accumulated other comprehensive income (loss). These securities are classified as current and non-current marketable securities based upon their maturities. Amortization of premiums and discounts is included in interest income. For the three months ended March 31, 2012 and 2011, the amortization of bond premiums totals $250 and $343, respectively. The values of these securities may fluctuate as a result of changes in market interest rates and credit risk.