Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Restricted Cash and Investments (Details Textual)

v3.8.0.1
Note 4 - Restricted Cash and Investments (Details Textual) - USD ($)
$ in Millions
Dec. 31, 2017
Jun. 30, 2017
Restricted Cash and Investments, Noncurrent $ 7.1 $ 7.3