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Note 12 - Fair Value Measurements (Details) (USD $)
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9 Months Ended | 12 Months Ended | |
|---|---|---|---|
|
Mar. 31, 2014
|
Mar. 31, 2013
|
Jun. 30, 2013
|
|
| Note 12 - Fair Value Measurements (Details) [Line Items] | |||
| Restricted Cash and Investments, Noncurrent | $ 8,900,000 | $ 15,400,000 | |
| Available-for-sale Securities | 20,138,000 | 15,529,000 | |
| Available-for-sale Securities, Gross Unrealized Gain (Loss) | 0 | 0 | |
| Impairment of Long-Lived Assets to be Disposed of | 1,600,000 | ||
|
Municipal Bonds [Member]
|
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| Note 12 - Fair Value Measurements (Details) [Line Items] | |||
| Available-for-sale Securities | 20,100,000 | 14,000,000 | |
|
Corporate Bond Securities [Member]
|
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| Note 12 - Fair Value Measurements (Details) [Line Items] | |||
| Available-for-sale Securities | $ 1,500,000 | ||