Note 3 - Available-For-Sale Investments - Amortized Cost and Market Value of Available-For-Sale Securities by Major Security Type (Details) - USD ($) |
Jun. 30, 2015 |
Jun. 30, 2014 |
|---|---|---|
| US States and Political Subdivisions Debt Securities [Member] | ||
| Cost | $ 0 | $ 3,525,000 |
| Market | 0 | 3,525,000 |
| Domestic Corporate Debt Securities [Member] | ||
| Cost | 0 | 100,000 |
| Market | 0 | 100,000 |
| Certificates Of Deposit [Member] | ||
| Cost | 4,089,000 | 7,639,000 |
| Market | 4,089,000 | 7,639,000 |
| Equity Securities [Member] | ||
| Cost | 29,472,000 | 29,472,000 |
| Market | 52,300,000 | 37,097,000 |
| Cost | 33,561,000 | 40,736,000 |
| Market | $ 56,389,000 | $ 48,361,000 |
| X | ||||||||||
- Definition This item represents the cost of debt 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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- 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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