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Note 5. Short-Term Investments | 9 Months Ended
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Sep. 29, 2013
Investments, Debt and Equity Securities [Abstract] |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] | 5. Short-Term Investments Short-term investments consist of commercial paper and corporate bonds which are classified as available-for-sale securities and are carried at current fair market value, with the resulting unrealized gains and losses excluded from earnings and reported, net of tax, as a separate component of shareholders' equity until realized. If the carrying value of an investment is in excess of its fair market value, an impairment charge to adjust the carrying value to the fair market value is recorded if the impairment is considered other-than-temporary. There were no other-than-temporary impairments related to declines in fair market value of short-term investments during the three or nine months ended September 29, 2013. All short-term investments held as of September 29, 2013 have original maturity dates of twelve months or less and are classified as current assets. The Company held no short-term investments as of December 30, 2012. As of September 29, 2013, short-term investments consisted of the following (in thousands):
|  | Amortized Cost |  |  | Fair Value |  |  | Unrealized Gain/(Loss) |
Commercial paper |  | $ | 19,984 |  |  | $ | 19,987 |  |  | $ | 3 |
Corporate bonds |  |  | 28,976 |  |  |  | 28,964 |  |  |  | (12) |
Balances at September 29, 2013 |  | $ | 48,960 |  |  | $ | 48,951 |  |  | $ | (9) |

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