Note H - Marketable Securities	9 Months Ended
Sep. 30, 2011
Marketable Securities [Text Block]	Note H– Marketable Securities Marketable securities consist primarily of corporate and U.S. government and federal agency bonds with maturities greater than three months and up to six years at the time of purchase as well as marketable equity securities. 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- and nine-month periods ended September 30, 2011, the amortization of bond premiums totals $234 and $898, respectively, compared to $320 and $822 for the comparable periods in 2010. The values of these securities may fluctuate as a result of changes in market interest rates and credit risk.

Note H - Marketable Securities

9 Months Ended

Sep. 30, 2011

Note H– Marketable Securities

Marketable securities consist primarily of corporate and U.S. government and federal agency bonds with maturities greater than three months and up to six years at the time of purchase as well as marketable equity securities. 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- and nine-month periods ended September 30, 2011, the amortization of bond premiums totals $234 and $898, respectively, compared to $320 and $822 for the comparable periods in 2010. The values of these securities may fluctuate as a result of changes in market interest rates and credit risk.