Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Fair Value Measurements (Detail)

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Note 12 - Fair Value Measurements (Detail) (USD $)
Mar. 31, 2013
Jun. 30, 2012
Restricted Cash and Investments, Noncurrent $ 15,400,000 $ 15,400,000
Available-for-sale Securities 18,176,000 9,005,000
Long Lived Assets Held-for-sale, Impairment Charge 1,600,000  
Municipal Bonds [Member]
   
Available-for-sale Securities 16,700,000 7,500,000
Corporate Bond Securities [Member]
   
Available-for-sale Securities $ 1,500,000 $ 1,500,000