Note 2 - Available-for-sale Investments (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2015 |
Dec. 31, 2014 |
|
| Municipal Bonds and Notes [Member] | ||
| Adjusted cost | $ 10,003 | |
| Gross unrealized gains | 2 | |
| Fair value | 10,005 | |
| Financial Institution Instruments [Member] | ||
| Adjusted cost | $ 12,565 | $ 7,502 |
| Gross unrealized gains | ||
| Fair value | $ 12,565 | $ 7,502 |
| Adjusted cost | 22,568 | $ 7,502 |
| Gross unrealized gains | 2 | |
| Fair value | $ 22,570 | $ 7,502 |
| X | ||||||||||
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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