Convertible Debt (Tables)

12 Months Ended

Dec. 31, 2014

Short-term Debt [Line Items]

Schedule of Debt

As of December 31, 2014 and 2013, the Company had outstanding 2015 convertible senior notes with a combined face value of $18.0 million. Of these balances $18.0 million and $0.0 million were classified as current liabilities in the Consol

Convertible Senior Notes [Member]

Short-term Debt [Line Items]

Schedule of Debt

2013 Convertible Senior Notes

On February 15, 2013, the Company repaid at maturity the entire outstanding balance of the 2.75% convertible senior notes due 2013 (the "2013 convertible senior notes") in accordance with the terms thereof.

2015 Convertible Senior Notes

On June 20, 2012, the Company entered into subscription agreements with certain holders of the Company's 2013 convertible senior notes. Pursuant to the subscription agreements, on June 29, 2012 the Company exchanged $18.0 million aggregate principal amount of the 2013 convertible senior notes for $18.0 million aggregate principal amount of the Company's 2015 convertible senior notes. The 2015 convertible senior notes mature on February 15, 2015 and had a coupon rate of 4.5%.

As of December 31, 2014 and 2013, the Company had outstanding 2015 convertible senior notes with a combined face value of $18.0 million. Of these balances $18.0 million and $0.0 million were classified as current liabilities in the Consolidated Balance Sheets at December 31, 2014 and 2013. As of December 31, 2014 and 2013, the estimated fair value of the Company's 2015 convertible senior notes was $18.0 million and $17.8 million