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 $)
Sep. 30, 2012
Jun. 30, 2012
Restricted Cash and Investments, Noncurrent $ 15,400,000 $ 15,400,000
Available-for-sale Securities 10,670,000 9,005,000
Municipal Bonds [Member]
   
Available-for-sale Securities 9,200,000 7,500,000
Corporate Bond Securities [Member]
   
Available-for-sale Securities $ 1,500,000 $ 1,500,000