Annual report pursuant to Section 13 and 15(d)

Short-term Investments (Details)

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Short-term Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Mar. 31, 2015
Short-term investments    
Certificates of deposit   $ 7,912
Held-to-maturity, pre-refunded municipal bonds $ 10,555 15,994
Total investments $ 10,555 $ 23,906