(5) Marketable Securities

At December 31, 2013 and June 30, 2013, the Company held marketable securities of $20.2 million and $15.5 million respectively, classified as current assets, consisting of U.S. municipal and corporate bonds with maturities ranging from less than one year to less than two years, which were rated A/A2 or better by the rating services Standard & Poors (“S&P”) and Moodys Investors Service (“Moodys”) respectively. There were no material realized or unrealized gains or losses for the six months ended December 31, 2013 and December 31, 2012. We do not believe there are any impairments considered to be other than temporary at December 31, 2013. See also Note 12, “Fair Value Measurements".