Annual report pursuant to Section 13 and 15(d)

Short-term Investments (Details)

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Short-term Investments (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Mar. 31, 2013
Short-term investments    
Certificates of deposit $ 1,476 $ 3,682
Held-to-maturity, pre-refunded municipal bonds 14,108 20,667
Total investments $ 15,584 $ 24,349