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Certificates of Deposit	3 Months Ended
Certificates of Deposit	Mar. 31, 2015
Certificates of Deposit
Certificates of Deposit	(2)Certificates of Deposit At March 31, 2015, certificates of deposit totaling $3.0 million with an interest rate of 0.65% mature on September 13, 2015. In April 2015, $3.0 million in a money market account was transferred to a certificate of deposit maturing in April 2016 with an interest rate of 0.65%. Certificates of deposit are carried at cost which approximates fair value.