Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Restricted Cash and Investments (Details Textual)

v3.3.0.814
Note 4 - Restricted Cash and Investments (Details Textual) - USD ($)
Sep. 30, 2015
Jun. 30, 2015
Sep. 30, 2014
Restricted Cash and Investments, Noncurrent $ 7,800,000 $ 8,000,000 $ 8,000,000