Short-term Investments	6 Months Ended
Short-term Investments	Jun. 30, 2015
Short-term Investments [Abstract]
Short-term Investments	4. Short-term Investments The Company held $15.0 million of short-term investments at June 30, 2015, as compared to $45.6 million at December 31, 2014. The Company has classified these investments as available for sale. These investments are federally insured certificates of deposit with a maturity date of August 27, 2015.

The entire disclosure for investments in certain debt and equity securities.