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Note 2 - Cash and Cash Equivalents and Short-term Investments (Tables) | 3 Months Ended
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Mar. 31, 2013
Schedule of Cash, Cash Equivalents and Short-term Investments [Table Text Block] |
|  | March 31, 2013 |
|  | Total Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Gross Unrealized Gains (pre-tax) |  |  | Gross Unrealized Losses (pre-tax) |
Mutual funds |  | $ | -- |  |  | $ | -- |  |  | $ | -- |  |  | $ | -- |  |  | $ | -- |
Municipal bonds |  |  | 21,562 |  |  |  | -- |  |  |  | 21,562 |  |  |  | 769 |  |  |  | (189 | )
Total securities available-for-sale |  | $ | 21,562 |  |  | $ | -- |  |  | $ | 21,562 |  |  | $ | 769 |  |  | $ | (189 | )
|  | December 31, 2012 |
|  | Total Fair Value |  |  | Level 1 |  |  | Level 2 |  |  | Gross Unrealized Gains (pre-tax) |  |  | Gross Unrealized Losses (pre-tax) |
Mutual funds |  | $ | 27,582 |  |  | $ | 27,582 |  |  | $ | -- |  |  | $ | 337 |  |  | $ | 9 |
Municipal bonds |  |  | 21,629 |  |  |  | -- |  |  |  | 21,629 |  |  |  | 862 |  |  |  | 128 |
Total securities available-for-sale |  | $ | 49,211 |  |  | $ | 27,582 |  |  | $ | 21,629 |  |  | $ | 1,199 |  |  | $ | 137 |

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- Definition Tabular disclosure of the components of cash, cash equivalents, and short-term investments. Short-term investments may include current marketable securities. + References No definition available. + Details
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