Convertible Debt (Tables)

12 Months Ended

Dec. 31, 2015

Convertible Senior Notes [Member]

Short-term Debt [Line Items]

Schedule of Debt

The following table outlines the effective interest rate, contractually stated interest costs, and costs related to the amortization of issuance costs for the Company's 2013 and 2015 convertible senior notes:

	Years Ended
	December 31,
	2015	2014	2013
Effective interest rate of 2013 convertible senior notes	NA	NA	2.75%
Effective interest rate of 2015 convertible senior notes	4.50%	4.50%	4.50%
Contractually stated interest costs	$101	$810	$810
Amortization of interest costs	$7	$43	$43