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Note 6 - Available-for-Sale Investments (Tables) | 9 Months Ended
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Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract] |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
| Amortized cost |  | Fair value
| September 30, 2015 |  | December 31, 2014 |  | September 30, 2015 |  | December 31, 2014
Bonds, notes and other securities: |  |  |  |  |  |  |  |  |  |  |
U.S. government and agencies | $ | 573 |  | $ | 759 |  | $ | 573 |  | $ | 759
Total short-term investments | $ | 573 |  | $ | 759 |  | $ | 573 |  | $ | 759
Asset-backed securities | $ | 39 |  | $ | 42 |  | $ | 35 |  | $ | 38
Total long-term investments | $ | 39 |  | $ | 42 |  | $ | 35 |  | $ | 38
Investments Classified by Contractual Maturity Date [Table Text Block] |
Less than one year | $545
Due in 1-5 years | 28
Due in 5-10 years |
Due after 10 years (1) | 35
Total | $608

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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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