Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Cash and Cash Equivalents (Details)

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Note 2 - Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Cash [Member]    
Cash and cash equivalents $ 51,852 $ 37,314
Available-for-Sale Investments[ Member]    
Cash and cash equivalents 22,570 7,502
Cash and cash equivalents $ 74,422 $ 44,816