Convertible Senior Notes (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Components of Total Interest Expense, Net Recognized

The following table sets forth the components of interest expense recognized in the accompanying Consolidated Statements of Operations for the 2013 Convertible Notes:

	December 31,
	2018			2017
Stated coupon interest expense	$	981		$	2,615
Amortization of debt issuance costs	220			567
Accretion of debt discount	1,931			4,890
Total interest expense	$	3,132		$	8,072
Effective interest rate	8.41		%	8.41		%