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Note 12 - Fair Value Measurements (Details) (USD $)
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6 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2012
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Dec. 31, 2013
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Jun. 30, 2013
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| Note 12 - Fair Value Measurements (Details) [Line Items] | |||
| Restricted Cash and Investments, Noncurrent | $ 14,900,000 | $ 15,400,000 | |
| Available-for-sale Securities | 20,157,000 | 15,529,000 | |
| Impairment of Long-Lived Assets to be Disposed of | 1,600,000 | ||
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Municipal Bonds [Member]
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| Note 12 - Fair Value Measurements (Details) [Line Items] | |||
| Available-for-sale Securities | 19,100,000 | 14,000,000 | |
|
Corporate Bond Securities [Member]
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| Note 12 - Fair Value Measurements (Details) [Line Items] | |||
| Available-for-sale Securities | $ 1,000,000 | $ 1,500,000 |